EWAN Practice Final Exam

EWAN Practice Final Exam

1

What will be the result of adding the command ip dhcp excluded-address 172.16.4.1 172.16.4.5 to the

configuration of a local router that has been configured as a DHCP server?

Traffic that is destined for 172.16.4.1 and 172.16.4.5 will be dropped by the router.

Traffic will not be routed from clients with addresses between 172.16.4.1 and 172.16.4.5.

The DHCP server function of the router will not issue the addresses between 172.16.4.1 and 172.16.4.5.

The router will ignore all traffic that comes from the DHCP servers with addresses 172.16.4.1 and

172.16.4.5.

Observable Description Max Value

1 correctness of response 2 points for Option 3

0 points for any other option 2

This item references content from the following areas:

CCNA Exploration: Accessing the WAN

7.1.4 Configuring a DHCP Server

2

An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The

administrator receives an error message when trying to enter the IPv4 routes into RIPng. What is the

cause of the problem?

RIPng is incompatible with dual-stack technology.

All interfaces have been configured with the incorrect IPv4 addresses.

RIPv1 or RIPv2 needs to be configured in addition to RIPng to successfully use IPv4.

When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are shut down in favor

of the newer technology.






7.3.6 Routing Considerations with IPv6

3

Refer to the exhibit. Which DHCP requests will R1 answer?

all DHCP requests that R1 receives

requests that are broadcast to 10.0.1.255

DNS requests with a destination of 10.0.1.3

requests that are received on the FastEthernet 0/0 interface

requests that come from any networks that are not listed as excluded







4

Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from the DHCP

server. The output of the debug ip dhcp server command shows "DHCPD: there is no address pool for

10.1.1.1". What is the problem?

The 10.1.1.1 address is already configured on Fa0/0.

The default router for the 10Network pool is incorrect.

The ip helper-address must be added to Fa0/0 interface.

The pool of addresses for the 10Network pool is incorrect.






7.1.8 Troubleshooting DHCP

5

Refer to the exhibit. The hosts in network A all have static addresses that are assigned in the

192.168.2.0./24 network. The hosts in network B are DHCP clients in the 192.168.1.0/24 network.

After router R1 has been configured with the statements as shown in the exhibit, the DHCP clients are

reporting that they cannot access any network resources. The hosts with static addresses cannot

access any resources outside network A. What is the problem?

The DHCP scope has the wrong address pool.

The interfaces on R1 are incorrectly addressed.

The assignable DCHP addresses are all excluded.

The DCHP clients are receiving the wrong default router address.







6

Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. HostA has sent

a packet to Web Server. What is the destination IP address of the return packet from Web Server when

it is received at the NIC on HostA?

10.1.1.2:1234

172.30.20.1:1234

172.30.20.1:3333

192.168.1.2:80






7.2.2 What is NAT?

7

At what physical location does the responsibility for a WAN connection change from the service

provider to the user?

DMZ

local loop

CSU/DSU

demarcation point






2.1.3 Demarcation Point

8

What three statements describe the roles of devices in a WAN? (Choose three.)

A CSU/DSU terminates a digital local loop.

A modem terminates a digital local loop.

A CSU/DSU terminates an analog local loop.

A modem terminates an analog local loop.

A router is commonly considered a DTE device.

A router is commonly considered a DCE device.


1 correctness of response Option 1, Option 4, and Option 5 are correct.

1 point for each correct option.

0 points if more options are selected than required. 3



1.2.2 WAN Physical Layer Concepts

9

Refer to the exhibit. Which statement is true about the WAN switch device?

It uses a multiport internetworking device to switch traffic such as Frame Relay, ATM or X.25 over the

WAN.

It provides internetworking and WAN access interface ports that are used to connect to the service

provider network.

It provides termination for the digital signal and ensures connection integrity through error correction

and line monitoring.

It converts the digital signals produced by a computer into voice frequencies that can be transmitted

over the analog lines of the public telephone network.







10

Refer to the exhibit. An administrator is trying to connect Router1, a Cisco router, to a non-Cisco

router using a serial connection. Why is the connection failing?

A loopback is not set.

The interface has been shut down.

The wrong encapsulation is being used.

Queuing cannot be used when connecting to non-Cisco devices.






2.1.7 Troubleshooting a Serial Interface

11

Which device encodes data for transmission across the WAN service provider transmission link?

CPE

DTE

DCE

UART






2.1.4 DTE and DCE

12

Refer to the exhibit. Why are the routers unable to establish a PPP session?

The usernames are misconfigured.

The IP addresses are on different subnets.

The clock rate is configured on the wrong end of the link.

The CHAP passwords must be different on the two routers.

Interface serial 0/0/0 on Router1 must connect to interface serial 0/0/1 on Router2.






2.4.5 Configuring PPP with Authentication

13

What are the symptoms when the s0/0/0 interface on a router is attached to an operational CSU/DSU

that is generating a clock signal, but the far end router on the point-to-point link has not been

activated?

show controllers indicates cable type DCE V.35. show interfaces s0/0/0 indicates serial down, line

protocol down.

show controllers indicates cable type DCE V.35. show interfaces s0/0/0 indicates serial up, line

protocol down.

show controllers indicates cable type DTE V.35. show interfaces s0/0/0 indicates serial up, line

protocol down.

show controllers indicates cable type DTE V.35. show interfaces s0/0/0 indicates serial down, line

protocol down.







14

Refer to the exhibit. Router1 is not able to communicate with its peer that is connected to this

interface. Based on the output as shown, what is the most likely cause?

interface reset

improper LMI type

encapsulation failure

local cable unplugged






8.4.3 Data Link Layer Troubleshooting

15

Which protocol is used to authenticate connections over serial links securely?

CHAP

HDLC

SLIP

PAP






2.4.1 PPP Authentication Protocols

2.4.3 Challenge Handshake Authentication Protocol (CHAP)

16

Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from

the DC office of ABC Company to the Orlando office?

MAC address of the Orlando router

MAC address of the DC router

192.168.1.25

192.168.1.26

DLCI 100

DLCI 200






3.1.3 Frame Relay Encapsulation

17

While configuring a Frame Relay connection, when should a static Frame Relay map be used?

the remote router is a non-Cisco router

the local router is configured with subinterfaces

broadcast traffic and multicast traffic over the PVC must be controlled

globally significant rather than locally significant DLCIs are being used






3.1.5 Frame Relay Address Mapping

18

Refer to the exhibit. Branch A has a Cisco router and Branch B has a non-Cisco router that is using

IETF encapsulation . After the commands that are shown are entered, R2 and R3 fail to establish the

PVC. The R2 LMI is Cisco, and the R3 LMI is ANSI. The LMI is successfully established at both

locations. Why is the PVC failing?

The PVC to R3 must be point-to-point.

LMI types cannot be different on each end of a PVC.

A single port can only support one encapsulation type.

The IETF parameter is missing from the frame-relay map ip 192.168.1.3 203 command.







19

Refer to the exhibit. Which statement is true about the status of the Frame Relay connection?

The Frame Relay connection is in the process of negotiation.

Only packets with control bit DE set are sent over the PVC. No data traffic traverses the link.

Packets marked as FECN and BECN indicate that a congestion control mechanism is enabled on the

Frame Relay PVC.

The “DLCI USAGE = LOCAL” status indicates that the PVC link is not established between the

interface S0/0/0.1 and the Frame Relay switch.






3.3.3 Frame Relay Flow Control

20

Refer to the exhibit. You are a network administrator who has been tasked with completing the Frame

Relay topology that interconnects two remote sites. How should the point-to-point subinterfaces be

configured on HQ to complete the topology?

HQ(config-subif)#frame-relay interface-dlci 103 on Serial 0/0/0.1



HQ(config-subif)# frame-relay interface-dlci 302 on Serial 0/0/0.2

HQ(config-subif)#frame-relay map ip 172.16.1.1 103 broadcast on Serial 0/0/0.1









3.4.1 Configuring Frame Relay Subinterfaces

21

A router in a Frame Relay network needs to forward a message received from a host. What two

methods does the router use to identify the correct VC to forward the message? (Choose two.)

The router forwards the frame to all ports in the network and learns the address from the reply frame.

The destination host IP address is embedded in the DLCI.

The router searches Inverse ARP tables for maps of DLCIs to IP addresses.

A table of static mappings can be searched.

The router broadcasts a request for the required IP address.


1 correctness of response Option 3 and Option 4 are correct.






22

A company is looking for a WAN solution to connect its headquarters site with four remote sites. What

advantage would dedicated leased lines provide to the customer compared to a shared Frame Relay

solution?

lower cost

lower latency and jitter

variable bandwidth capacity

fewer physical router interfaces






1.3.2 Dedicated Connection Link Options

23

Which two functions are provided by the Local Management Interface (LMI) that is used in Frame

Relay networks? (Choose two.)

flow control

error notification

congestion notification

the mapping of DLCIs to network addresses

the sending of keepalive packets to verify operation of the PVC








24

A technician is talking to a colleague at a rival company and comparing DSL transfer rates between

the two companies. Both companies are in the same city, use the same service provider, and have the

same rate/service plan. What is the explanation for why Company A reports higher download speeds

than Company B?

Company B has a higher volume of POTS voice traffic than Company A.

Company B shares the conection to the DSLAM with more clients than Company A.

Company A only uses microfilters on branch locations.

Company A is closer to the service provider.






6.2.3 DSL

25

Refer to the exhibit. A packet is being sent from Host A to Host B through the VPN tunnel between R1

and R3. When the packet first arrives at R3, what are the source and destination IP addresses of the

packet?

Source 192.168.1.2 - Destination 192.168.4.2









6.3.5 VPN Tunneling

26

What are two characteristics of DSL technology? (Choose two.)

Uploads typically offer larger transfer rates than downloads.

Service providers deploy DSL in the local loop of the telephone network.

DSL download rates are reduced by large volumes of POTS voice traffic.

Filters and splitters allow POTS and DSL traffic to share the same medium.

DSL is a shared medium that allows many users to share bandwidth available from the DSLAM.







6.2.3 DSL

27

What is a major characteristic of a worm?

malicious software that copies itself into other executable programs

tricks users into running the infected software

a set of computer instructions that lies dormant until triggered by a specific event

exploits vulnerabilities with the intent of propagating itself across a network






4.1.3 Types of Network Attacks

28

Refer to the exhibit. The network administrator is adding R1 to an existing network. As a part of the

corporate IT procedures, the administrator attempts to back up the router Cisco IOS software of R1

and receives the output shown. The network administrator then attempts unsuccessfully to ping the

TFTP server from the console session. What should be done next to isolate this problem?

From R2, validate that interface Fa0/0 is operational.

From the TFTP server, verify that the software on the TFTP server is operational.

From the TFTP server, confirm there is enough room on the TFTP server for the Cisco IOS software.

From the console session, make sure that R1 has a route to the network where the TFTP server

resides.






4.5.3 Managing Cisco IOS Images

29

A technician has been asked to run the Cisco SDM one-step lockdown on the router of a customer.

What will be the result of this process?

The router will download the latest security patches from the specified FTP server.

All security configurations that are offered by the Cisco AutoSecure feature will be automatically

implemented.

All traffic that enters the router is quarantined and checked against the possible security problems

before being forwarded.

The existing router configurations will be examined and all potential security-related configuration

changes will be automatically implemented.






4.4.6 Locking Down a Router with Cisco SDM

30

Refer to the exhibit. A network administrator is trying to configure a router to use SDM, but the

network administrator cannot access the SDM interface of the router. What is the cause of the

problem?

The VTY lines are misconfigured.

The HTTP timeout policy is misconfigured.

The authentication method is misconfigured.

The username and password are misconfigured.






4.4.2 Configuring Your Router to Support Cisco SDM

31

Which three statements accurately describe attributes of a security policy? (Choose three.)

It creates a basis for legal action if necessary.

It should not be altered once it is implemented.

It defines a process for managing security violations.

It focuses primarily on threats from outside of the organization.

It defines acceptable and unacceptable use of network resources.

It provides step-by-step procedures to harden routers and other network devices.







4.1.6 The Enterprise Security Policy

32

Where will a router operating system image be copied after the copy flash: tftp command is issued?

flash

DRAM

NVRAM

remote server






4.5.4 Backing up and Upgrading Software Image

33

When configuring remote access to a router, what is the significance of the no password command on

a VTY line?

Logins are prevented on that line.

No password is required to log in to that line.

The remote user is not allowed to change the password for that line.

The remote user is prompted to change the line password after connecting to the router.






4.2.4 Securing Remote Administrative Access to Routers

34

What effect would the Router1(config-ext-nacl)# permit tcp 172.16.4.0 0.0.0.255 any eq www

command have when implemented inbound on the f0/0 interface?

All TCP traffic is permitted, and all other traffic is denied.

The command is rejected by the router because it is incomplete.

All traffic from 172.16.4.0/24 is permitted anywhere on any port.

Traffic originating from 172.16.4.0/24 is permitted to all TCP port 80 destinations.






5.3.4 Creating Named Extended ACLs

35

Which statement is true about wildcard masks?

Inverting the subnet mask will always create the wildcard mask.

A wildcard mask identifies a network or subnet bit by using a "1".

The same function is performed by both a wildcard mask and a subnet mask.

When a "0" is encountered in a wildcard mask, the IP address bit must be checked.






5.2.3 ACL Wildcard Masking

36

Refer to the exhibit. An ACL called Managers already exists on this router. What happens if the

network administrator issues the commands as shown in the exhibit?

The new ACL overwrites the existing ACL.

The network administrator will receive an error message.

The existing ACL is modified to include the new command.

A second Managers ACL is created that contains only the new command.






5.2.8 Editing Named ACLs

37

Refer to the exhibit. The network administrator creates a standard access control list on Router1 to

prohibit traffic from the 172.16.1.0/24 network from reaching the 172.16.2.0/24 network while still

permitting Internet access for all networks. On which router interface and in which direction should it

be applied?

interface Fa0/0, inbound

interface Fa0/0, outbound

interface Fa0/1, inbound

interface Fa0/1, outbound






5.1.8 Where to Place ACLs

38

Refer to the exhibit. The SSH connections between the remote user and the server are failing. The

correct configuration of NAT has been verified. What is the most likely cause of the problem?

SSH is unable to pass through NAT.

There are incorrect access control list entries.

The access list has the incorrect port number for SSH.

The ip helper command is required on S0/0/0 to allow inbound connections.






8.4.5 Transport Layer Troubleshooting

39

Refer to the exhibit. Partial results of the show access-list and show ip interface fastethernet 0/1

commands for router R3 are shown. There are no other ACLs in effect. Host A is unable to telnet to

host B. Which action will correct the problem but still restrict other traffic between the two networks?

Modify the second entry in the list to permit tcp host 192.168.10.10 any eq telnet .

Reverse the order of the TCP protocol statements in the ACL.

Apply the ACL on the FastEthernet 0/0 interface.

Apply the ACL in the inbound direction.






5.4.5 Troubleshooting Common ACL Errors

40

Which protocol is implicitly denied at the end of an IPv4 access list?

IP

TCP

UDP

HTTP






5.1.4 ACL Operation

41

What type of ACL can be used to force a user to authenticate to the router before accessing a network?

standard

dynamic

reflexive

time-based






5.4.2 Dynamic ACLs

42

Refer to the exhibit. Which two statements correctly describe how Router1 processes an FTP request

that enters interface S0/0/0 and is destined for an FTP server at IP address 192.168.1.5? (Choose

two.)

The packet does not match an access list condition.

The router matches the incoming packet to the statement that is created from the access-list 201

permit ip any any command.


permit ip any 192.168.1.0 0.0.0.255 command.

The router matches the incoming packet to the statement that is created from the access-list 201 deny

icmp 192.168.1.0 0.0.0.255 any command.

The packet is allowed into Router1.







5.1.4 ACL Operation

43

An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator is

able to ping the local mail server IP address successfully from a remote network and can successfully

resolve the mail server name to an IP address via the use of the nslookup command. At what layer of

the OSI model is the problem most likely to be found?

application

transport

network

data link






8.4.6 Application Layer Troubleshooting

44

Refer to the exhibit. Router1 and Router2 each support separate areas of a data center, and are

connected via a crossover cable. Resources attached to Router1 are unable to connect to resources

attached to Router2. What is the likely cause?

The crossover cable is faulty.

The IP addressing is incorrect.

There is a Layer 2 problem with the router connection.

The upper layers are experiencing an unspecified problem.

One or both of the Ethernet interfaces are not working correctly.






8.4.4 Network Layer Troubleshooting

45

While troubleshooting a problem with an e-mail server, an administrator observes that the switch port

used by the server shows "up, line protocol up". The administrator cannot ping the server. At which

layer of the OSI model is the problem most likely to be found?

application layer

network layer

data link layer

physical layer








46

A network administrator is analyzing the data from a network performance baseline. Which condition

will not be indicated in the baseline data?

the IP addressing scheme of the network

the most heavily used parts of the network

congested areas of the network

error rates in different parts of the network






8.1.3 Why is Establishing a Network Baseline Important?

47

Because of a remote-procedure call failure, a user is unable to access an NFS server. At what layer of

the TCP/IP model does this problem occur?

network layer

data link layer

physical layer

application layer







48

Refer to the exhibit. Routers R1 and R2 have been configured with EIGRP in the same autonomous

system. Computers PC1 and PC2 are not able to ping each other. Further investigation has revealed

that the route to 192.168.10.0 is missing from the routing table on R2. What is the cause of the

problem?

The networks are not correctly summarized.

The FastEthernet interfaces on R1 are configured as passive.

The network statements on R2 are incorrectly configured.

EIGRP on R1 does not recognize the 192.168.10.0 network.






8.5.2 Troubleshooting Enterprise Networks 2

49

Refer to the exhibit. Routers R1 and R2 are both configured for single area OSPF. Users who are

connected to switch S1 are unable to access database applications that run on servers that are

connected to S2. The network engineer is working remotely and only has the information that is

shown in the exhibit to direct initial troubleshooting efforts. Based on the exhibit, which OSI layer is

the most appropriate to start with for a divide-and-conquer approach?

network layer

application layer

data-link layer

physical layer







50

Refer to the exhibit. An administrator has added the exhibited commands to routers A and B, but no

routing updates are exchanged between the two routers. Based on the information that is given, what

is the likely cause of the problem?

Router A is advertising the wrong network.

The authentication key strings do not match.

The serial interfaces of routers A and B are not on the same network.

The authentication key numbers do not match the EIGRP process number for both routers.




1 Which address provides an example of an IPv6 link-local address?

FE80::1324:ABCD

2001:2345:AB12:1935::FEFF

2001:1234:0000:9CA::0876/64

1234:ABCD:5678:EF00:9234:AA22:5527:FC35






7.3.2 IPv6 Addressing

2 While configuring a router using RIPng and dual-stack technology with IPv4 and IPv6, the

administrator receives an error message when inputting IPv4 routes. What could cause the error

message?

IPv4 is not compatible with RIPng

RIPng is incompatible with dual-stack technology.

The router interfaces have been configured with incorrect addresses.

When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are shut down in favor

of the newer technology.






7.3.6 Routing Considerations with IPv6

3 Which statement is true about an interface that is configured with the IPv6 address command?

IPv6 traffic-forwarding is enabled on the interface.

A link-local IPv6 address is automatically configured on the interface.

A global unicast IPv6 address is dynamically configured the interface.

Any IPv4 addresses that are assigned to the interface are replaced with an IPv6 address.






7.3.7 Configuring IPv6 Addresses

4 What will be the result of adding the command ip dhcp excluded-address 172.16.4.1 172.16.4.5 to the

configuration of a local router that has been configured as a DHCP server?

Traffic that is destined for 172.16.4.1 and 172.16.4.5 will be dropped by the router.

Traffic will not be routed from clients with addresses between 172.16.4.1 and 172.16.4.5.

The DHCP server function of the router will not issue the addresses between 172.16.4.1 and

172.16.4.5.

The router will ignore all traffic that comes from the DHCP servers with addresses 172.16.4.1 and

172.16.4.5.







5

Refer to the exhibit. A host that is connected to Fa0/0 is unable to acquire an IP address dynamically

from the DHCP server. The output of the debug ip dhcp server command shows "DHCPD: there is no

address pool for 172.16.1.1". What is the problem?

The default router for the 172Network pool is incorrect.

The 172.16.1.1 address is already configured on Fa0/0.

The pool of addresses for the 172Network pool is incorrect.

The ip helper-address command should be implemented on the Fa0/0 interface.






7.1.8 Troubleshooting DHCP

6 What does an access control list determine when used with NAT on a Cisco router?

addresses that are to be translated

addresses that are assigned to a NAT pool

addresses that are allowed out of the router

addresses that are accessible from the inside network






7.2.5 Configuring Dynamic NAT

7 A system administrator must provide Internet connectivity for ten hosts in a small remote office.

The ISP has assigned two public IP addresses to this remote office. How can the system administrator

configure the router to provide Internet access to all ten users at the same time?

Configure static NAT.

Configure dynamic NAT.

Configure static NAT with overload.

Configure dynamic NAT with overload.






7.2.6 Configuring NAT Overload

8 What three statements describe the roles of devices in a WAN? (Choose three.)

A CSU/DSU terminates a digital local loop.

A modem terminates a digital local loop.

A CSU/DSU terminates an analog local loop.

A modem terminates an analog local loop.

A router is commonly considered a DTE device.

A router is commonly considered a DCE device.








9 At what physical location does the responsibility for a WAN connection change from the service

provider to the user?

DMZ

local loop

CSU/DSU

demarcation point






2.1.3 Demarcation Point

10

Refer to the exhibit. Which statement is true about the WAN switch device?

It uses a multiport internetworking device to switch traffic such as Frame Relay, ATM or X.25 over the

WAN.

It provides internetworking and WAN access interface ports that are used to connect to the service

provider network.

It provides termination for the digital signal and ensures connection integrity through error correction

and line monitoring.

It converts the digital signals produced by a computer into voice frequencies that can be transmitted

over the analog lines of the public telephone network.







11

Refer to the exhibit. A network administrator is using two routers to test a WAN connection . What

can be concluded based on the output of the show running-config commands?

The WAN link is using PPP encapsulation.

The WAN link speed is faster than a T1 line.

The router R2 serves as the DCE for the WAN link.

The WAN link is configured with the Cisco default encapsulation protocol.






2.1.5 HDLC Encapsulation

12 Which important piece of troubleshooting information can be discovered about a serial interface

using the show controllers command?

queuing strategy

serial cable type

interface IP address

encapsulation method







13 Which combination of Layer 2 protocol and authentication should be used to establish a link

between a Cisco and a non-Cisco router without sending authentication information in plain text?

HDLC with PAP

HDLC with CHAP

PPP with PAP

PPP with CHAP






2.4.1 PPP Authentication Protocols

2.4.3 Challenge Handshake Authentication Protocol (CHAP)

14 Which three items are LCP options that can be configured for PPP? (Choose three.)

CHAP

Stacker

IPCP

CDPCP

Multilink







2.2.5 Establishing a Link with LCP

15 At what point in the PPP connection process does the authentication phase occur?

after NCP establishes Layer 3 parameters

before LCP begins the link establishment process

after the initial Configure-Request message from the link initiator

after the link initiator receives a Configure-Ack message from the responder






2.2.5 Establishing a Link with LCP

16

Refer to the exhibit. Why are the routers unable to establish a PPP session?

The usernames are misconfigured.

The IP addresses are on different subnets.

The clock rate is configured on the wrong end of the link.

The CHAP passwords must be different on the two routers.

Interface serial 0/0/0 on Router1 must connect to interface serial 0/0/1 on Router2.






2.4.5 Configuring PPP with Authentication

17

Refer to the exhibit. What would be the result of entering the exhibited configuration on a Frame

Relay router?

The local interface DLCI will be set to 102.

All traffic that is destined to 172.16.16.8 will be sent as broadcast.

Only broadcast traffic will be recieved on the Frame Relay interface.

Routing protocol multicast updates can be forwarded across the Frame Relay PVC.






3.2.2 Configuring Static Frame Relay Maps

18

Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from

the DC office of ABC Company to the Orlando office?

MAC address of the Orlando router

MAC address of the DC router

192.168.1.25

192.168.1.26

DLCI 100

DLCI 200






3.1.3 Frame Relay Encapsulation

19 A company uses a PVC with a committed information rate (CIR) of 128 kb/s and a committed burst

information rate (CBIR) of 64 kb/s. The link is used to periodically send updates at a rate of 144 kb/s.

What will happen to the update traffic?

The traffic will be sent, but the company will be charged a penalty.

The traffic will be sent using the additional CBIR and will be guaranteed delivery.

The traffic will be dropped at the CO for exceeding the committed information rate.

The traffic will be sent, but the burst traffic will be marked for discard if congestion is encountered.






3.3.2 Paying for Frame Relay

20 Which two functions are provided by the Local Management Interface (LMI) that is used in Frame

Relay networks? (Choose two.)

flow control

error notification

congestion notification

the mapping of DLCIs to network addresses

the sending of keepalive packets to verify operation of the PVC








21

Refer to the exhibit. You are a network administrator who has been tasked with completing the Frame

Relay topology that interconnects two remote sites. How should the point-to-point subinterfaces be

configured on HQ to complete the topology?




HQ(config-subif)# frame-relay interface-dlci 302 on Serial 0/0/0.2










3.4.1 Configuring Frame Relay Subinterfaces

22

Refer to the exhibit. Branch A has a Cisco router. Branch B has a non-Cisco router set for IETF

encapsulation. After the commands shown are entered, R2 and R3 fail to establish the PVC. The R2

LMI is Cisco, and the R3 LMI is ANSI. The LMI is successfully established at both locations. Why is

the PVC failing?

The PVC to R3 must be point-to-point.

LMI types must match on each end of a PVC.

The ietf parameter is missing from the frame-relay map ip 10.10.10.3 203 command.

The PVCs at R2 use different encapsulation types. A single port can only support one encapsulation

type.







23

Refer to the exhibit. A technician is teaching a trainee to interpret the results of various Frame Relay

troubleshooting commands. What conclusion can be drawn from the output that is shown?

Neighboring routers should use DLCI 177 to reach the Branch router.

DLCI 177 will be used to identify all broadcasts that are sent out the Branch router.

The Branch router has the address 192.168.3.1 configured for the S0/0/0 interface.

To reach 192.168.3.1, the Branch router will use the virtual circuit that is identified by DLCI 177.







24

Refer to the exhibit. Which statement is true about the status of the Frame Relay connection?

The Frame Relay connection is in the process of negotiation.

Only packets with control bit DE set are sent over the PVC. No data traffic traverses the link.

Packets marked as FECN and BECN indicate that a congestion control mechanism is enabled on the

Frame Relay PVC.

The “DLCI USAGE = LOCAL” status indicates that the PVC link is not established between the

interface S0/0/0.1 and the Frame Relay switch.






3.3.3 Frame Relay Flow Control

25 Which wireless solution can provide mobile users with non line-of-sight broadband Internet access

at speeds comparable to DSL or cable?

Wi-Fi

WiMAX

satellite

Metro Ethernet






1.3.5 Internet Connection Options

26 What are two characteristics of DSL technology? (Choose two.)

Uploads typically offer larger transfer rates than downloads.

Service providers deploy DSL in the local loop of the telephone network.

DSL download rates are reduced by large volumes of POTS voice traffic.

Filters and splitters allow POTS and DSL traffic to share the same medium.

DSL is a shared medium that allows many users to share bandwidth available from the DSLAM.







6.2.3 DSL

27

Refer to the exhibit. A packet is being sent from Host A to Host B through the VPN tunnel between R1

and R3. When the packet first arrives at R3, what are the source and destination IP addresses of the

packet?










6.3.5 VPN Tunneling

28 What is a major characteristic of a worm?

malicious software that copies itself into other executable programs

tricks users into running the infected software

a set of computer instructions that lies dormant until triggered by a specific event

exploits vulnerabilities with the intent of propagating itself across a network






4.1.3 Types of Network Attacks

29 What is the function of an IDS?

to report the attack after it happens

to stop the attack prior to its completion

to quarantine the virus or worm so as not to infect any other host

to reconfigure the security policy of a firewall to prevent another attack






4.1.4 General Mitigation Techniques

30 When configuring remote access to a router, what is the significance of the no password command

on a VTY line?

Logins are prevented on that line.

No password is required to log in to that line.

The remote user is not allowed to change the password for that line.

The remote user is prompted to change the line password after connecting to the router.






4.2.4 Securing Remote Administrative Access to Routers

31 What will be the result of the enable secret command when added at the global configuration mode

on the router?

It will use MD5 encryption to protect the privileged EXEC level access.

It will use type 7 encryption and will encrypt only the privileged EXEC level passwords.

It will use type 7 encryption to prevent all passwords that are displayed on the screen from being

readable.

It will use MD5 encryption to protect the passwords that are only used in the PAP and CHAP

authentication process.






4.2.3 Manage Router Security

32

Refer to the exhibit. A network administrator is trying to backup the IOS software on R1 to the TFTP

server. He receives the error message that is shown in the exhibit, and cannot ping the TFTP server

from R1. What action can help to isolate this problem?

Check that R1 has a route to the 10.10.10.0 network.

Verify that the TFTP server software supports binary file transfers.

Make sure that the TFTP server has 192.168.1.1 as its default gateway.

Ensure that the laptop has an IP address in the 192.168.1.0/24 network.






4.5.4 Backing up and Upgrading Software Image

33 A network technician accidentally deleted the IOS image from flash and rebooted the router. Which

two options can be used to restore the IOS image? (Choose two.)

Perform a system restore through SDM.

Download the image from a TFTP server through a network connection.

Download the image from a TFTP server through a console connection.

Establish an FTP session through an SSH connection for the image download.

Use the Xmodem protocol to download the image through a console connection.







4.5.5 Recovering Software Images

34

Refer to the exhibit. The network administrator creates a standard access control list to prohibit traffic

from the 192.168.1.0/24 network from reaching the 192.168.2.0/24 network while still permitting

Internet access for all networks. On which router interface and in which direction should it be

applied?

interface fa0/0/0, inbound

interface fa0/0/0, outbound

interface fa0/0/1, inbound

interface fa0/0/1, outbound






5.1.8 Where to Place ACLs

35 What effect would the Router1(config-ext-nacl)# permit tcp 172.16.4.0 0.0.0.255 any eq www

command have when implemented inbound on the f0/0 interface?

All TCP traffic is permitted, and all other traffic is denied.

The command is rejected by the router because it is incomplete.

All traffic from 172.16.4.0/24 is permitted anywhere on any port.

Traffic originating from 172.16.4.0/24 is permitted to all TCP port 80 destinations.






5.3.4 Creating Named Extended ACLs

36

Refer to the exhibit. Which two statements correctly describe how Router1 processes an FTP request

that enters interface S0/0/0 and is destined for an FTP server at IP address 192.168.1.5? (Choose

two.)

The packet does not match an access list condition.


permit ip any any command.


permit ip any 192.168.1.0 0.0.0.255 command.

The router matches the incoming packet to the statement that is created from the access-list 201 deny

icmp 192.168.1.0 0.0.0.255 any command.

The packet is allowed into Router1.







5.1.4 ACL Operation

37

Refer to the exhibit. An ACL numbered 101 already exists on this router. What happens if the network

administrator issues the commands that are shown in the exhibit?

The new ACL overwrites the existing ACL.

The network administrator will receive an error message.

The existing ACL is modified to include the new commands.

A second ACL that is numbered 101 is created and contains only the new commands.






5.2.5 Editing Numbered ACLs

38

Refer to the exhibit. What is the effect of the extended ACL when applied inbound on the S0/0/0

interface on R2?

All IP traffic will be permitted during the specified days and time range.

Both IP and Telnet traffic will be permitted during the specified days and time range.

Only Telnet traffic destined for 172.16.10.0/24 will be permitted during the specified days and time

range.

Telnet traffic will be permitted only during the specified days and time range. All other network traffic

will be permitted any time.






5.4.4 Time-based ACLs

39 Which wildcard mask would specify all IP addresses from 192.168.8.0 through 192.168.15.255?

0.0.0.7

0.0.7.255

0.0.8.255

0.0.15.255

0.0.255.255






5.2.3 ACL Wildcard Masking

40

Refer to the exhibit. The SSH connections between the remote user and the server are failing. The

correct configuration of NAT has been verified. What is the most likely cause of the problem?

SSH is unable to pass through NAT.

There are incorrect access control list entries.

The access list has the incorrect port number for SSH.

The ip helper command is required on S0/0/0 to allow inbound connections.






8.4.5 Transport Layer Troubleshooting

41 A network administrator added two switches and a new VLAN over the past weekend. How can the

administrator determine if the additions and changes improved performance and availability on the

company intranet?

Perform a baseline test and compare the current values to values that were obtained in previous

weeks.

Interview departmental secretaries and determine if they think load time for web pages is improved.

Compare the hit counts on the company web server for the current week to the values that were

recorded from previous weeks.

Performance on the intranet can be determined by monitoring load times of company web pages from

remote sites.






8.1.3 Why is Establishing a Network Baseline Important?

42 A company has its headquarters office in Dallas and five branch offices located in New York,

Chicago, Los Angeles, Seattle, and Atlanta. WAN links are used for communications among offices in

six sites. In planning the WAN links, the network designer is given two requirements: (1) minimize

cost and (2) provide a certain level of WAN link reliability with redundant links. Which topology

should the network designer recommend?

star

full mesh

hierarchical

partial mesh






8.3.4 WAN Topology Considerations

43

Refer to the exhibit. Router1 and Router2 each support separate areas of a data center, and are

connected via a crossover cable. Resources attached to Router1 are unable to connect to resources

attached to Router2. What is the likely cause?

The crossover cable is faulty.

The IP addressing is incorrect.

There is a Layer 2 problem with the router connection.

The upper layers are experiencing an unspecified problem.

One or both of the Ethernet interfaces are not working correctly.







44 An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator

is able to ping the local mail server IP address successfully from a remote network and can

successfully resolve the mail server name to an IP address via the use of the nslookup command. At

what layer of the OSI model is the problem most likely to be found?

application

transport

network

data link







45

Refer to the exhibit. A network technician has been called in to resolve a problem with this network

segment. The symptoms include a loss of connectivity throughout the network segment, high link

utilization, and syslog messages that indicate constant MAC address relearning. What is the likely

cause of these symptoms?

cable fault

faulty NIC card

IP addressing error

spanning tree problem

NAT configuration error






8.4.3 Data Link Layer Troubleshooting

46

Refer to the exhibit. The corporate network that is shown has been assigned network 172.16.128.0/19

for use at branch office LANs. VLSM is not being used. Which subnet mask will allow the most

efficient utilization of IP addresses?

/21

/22

/23

/24

/25

/26







47

Refer to the exhibit. Which VLAN will carry untagged traffic on FastEthernet 0/1?

VLAN 1

VLAN 2

VLAN 11

VLAN 12

VLAN 30

VLAN 999







48

Refer to the exhibit. In the partial router configuration that is shown, what is the purpose of access list

BLOCK_XYZ?

to prevent source IP address spoofing by hosts on the Fa0/0 LAN

to block access by Fa0/0 LAN hosts to all network services beyond the router

to prevent users on the Fa0/0 LAN from opening Telnet sessions on the router

to secure Fa0/0 hosts by allowing only locally sourced traffic into the Fa0/0 LAN






5.2.6 Creating Standard Named ACLs

49

Refer to the exhibit. Routers R1 and R2 are both configured for single area OSPF. Users who are

connected to switch S1 are unable to access database applications that run on servers that are

connected to S2. The network engineer is working remotely and only has the information that is

shown in the exhibit to direct initial troubleshooting efforts. Based on the exhibit, which OSI layer is

the most appropriate to start with for a divide-and-conquer approach?

network layer

application layer

data-link layer

physical layer







50

Refer to the exhibit. An administrator has added the exhibited commands to routers A and B, but no

routing updates are exchanged between the two routers. Based on the information that is given, what

is the likely cause of the problem?

Router A is advertising the wrong network.

The authentication key strings do not match.

The serial interfaces of routers A and B are not on the same network.

The authentication key numbers do not match the EIGRP process number for both routers.




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EWAN Practice Final Exam