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Take Assessment - ERouting Practice Final Exam - CCNA Exploration: Routing Protocols and Concepts(Version 4.0)

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1 What are three features of CDP? (Choose three.)

tests Layer 2 connectivityprovides a layer of securityoperates a OSI layers 2 and 3enabled by default on each interfaceused for debugging Layer 4 connectivity issuesprovides information on directly connected devices that have CDP enabled

2

Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command?(Choose two.)

A static route will be updated in the routing table.The traffic from the Internet will be directed to R2.The traffic from the source network 172.16.0.0/22 will be blocked.The route will be specified as the default route for all networks not defined in the routing table.All the broadcasts will be forwarded via the S0/0/0 interface of R2.

3 How does route poisoning prevent routing loops?New routing updates are ignored until the network has converged.Failed routes are advertised with a metric of infinity.A route is marked as unavailable when its Time to Live is exceeded.The unreachable route is cleared from the routing table after the invalid timer expires.

4 Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choosethree.)

The router modifies the TTL field, decrementing it by one.The router changes the source IP to the IP of the exit interface.The router maintains the same source and destination IP.The router changes the source physical address to the physical address of the exit interface.The router changes the destination IP to the IP of the exit interface.The router sends the packet out all other interfaces, besides the one it entered the router on.

5

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1 of 5 10-12-08 11:54 PM

Refer to the exhibit. The network administrator is planning IP addressing of a new network. What part of this addressing scheme must bechanged to allow communication between host A and the server?

the IP address of the serverthe default gateway of host Athe IP address of host Athe default gateway of the server

6

Refer to the exhibit. The network administrator issues the command no ip classless on Router1. What forwarding action will take placeon a packet that is received by Router1 and is destined for host 192.168.0.26?

The packet will be dropped.The packet will be forwarded to the gateway of last resort.The packet will match the 192.168.0.0 network and be forwarded out Serial 0/0.The packet will most closely match the 192.168.0.8 subnet and be forwarded out Serial 0/1.

7

Refer to the exhibit. All routes are advertised and fully operational on all routers. Which statement is true about the path that the data willtake from router A to router B?

If EIGRP is used with default configurations, the data will be equally distributed between two paths — A, D, B and A, C, B.


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If RIPv1 is used with default configurations, the data will be load-balanced on all paths.If EIGRP and OSPF are both used with default configurations, the data will be sent through paths learned by the OSPF protocol.If RIPv2 is used with default configurations, the data will be equally distributed between two paths — A, D, B and A, C, D.

8

Refer to the exhibit. R1 knows two routes, Path A and Path B, to the Ethernet network attached to R3. R1 learned Path A to network10.2.0.0/16 from a static route and Path B to network 10.2.0.0/16 from EIGRP. Which route will R1 install in its routing table?

Both routes are installed and load balancing occurs across both paths.The route via Path B is installed because the EIGRP route has the best metric to network 10.2.0.0/16.The route via Path A is installed because the static route has the best metric to network 10.2.0.0/16.The route via Path B is installed because the EIGRP route has the lowest administrative distance to network 10.2.0.0/16.The route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16.

9

Refer to the exhibit. A network administrator is troubleshooting the OSPF network. The 10.10.0.0/16 network is not showing up in therouting table of Router1. What is the probable cause of this problem?

The serial interface on Router2 is down.The OSPF process is not running on Router2.The OSPF process is configured incorrectly on Router1.There is an incorrect wildcard mask statement for network 10.10.0.0/16 on Router2.

10


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Refer to the routing table shown in the exhibit. What is the meaning of the highlighted value 192?It is the value assigned by the Dijkstra algorithm that designates the number of hops in the network.It is the value used by the DUAL algorithm to determine the bandwidth for the link.It is the metric, which is cost.It is the administrative distance.

11 Which routing protocol maintains a topology table separate from the routing table?IGRPRIPv1RIPv2EIGRP

12

Refer to the exhibit. A static route was configured on router R1 to forward packets to the remote networks. During a network upgrade, thenetwork administrator configured RIPv2 on all routers in the network. What will router R1 do with a packet that is sourced from PC1 anddestined for PC3?

The packet will be forwarded out the Serial0/0/0 interface via the static route.The packet will be forwarded out the FastEthernet0/1 interface via the static route.The packet will be forwarded out the Serial0/0/0 interface via the route that is learned through RIP.The packet will be forwarded out the FastEthernet0/1 interface via the route that is learned through RIP.

13 A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 hosts for localLANs. Which subnet mask should the administrator use to create the new subnets?

255.255.224.0255.255.240.0255.255.248.0255.255.252.0

14


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Refer to the exhibit. Which network command will prevent EIGRP on router RA from advertising the Ethernet networks but will allow theadvertisement of all networks on the WAN links?

RA(config-router)# network 172.16.1.0 0.0.0.0RA(config-router)# network 172.16.1.0 0.0.0.15RA(config-router)# network 172.16.1.0 0.0.0.63RA(config-router)# network 172.16.1.128 255.255.255.128RA(config-router)# network 172.16.1.0 255.255.255.240

15

Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been configured.

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16 What are two tasks that must be completed before two routers can use OSPF to form a neighbor adjacency? (Choose two.)

The routers must elect a designated router.The routers must agree on the network type.The routers must use the same dead interval.The routers must exchange link state requests.The routers must exchange database description packets.

17 A network technician must reduce the amount of broadcast traffic on the network while maintaining full connectivity between all differentnetwork segments. Which device should the administrator deploy?

hubrouterLayer 2 switchmultiport repeater

18

Refer to the exhibit. What information can be determined from the highlighted output?R1 is originating the route 172.30.200.32/28.Automatic summarization is disabled.The 172.30.200.16/28 network is one hop away from R1.A classful routing protocol is being used.

19


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Refer to the exhibit. An administrator is attempting to configure a router by copying and pasting the commands that are shown in theexhibit. However, only one of the FastEthernet interfaces is coming up. What is the problem?

Both interfaces are in the same IP subnet.FastEthernet0/1 does not have a description.There can be only one FastEthernet interface enabled on a router at one time.The administrator did not exit to global configuration mode before configuring FastEthernet0/1.

20

Refer to the exhibit. What happens to a packet that has 172.16.0.0/16 as the best match in the routing table that is shown?The packet is discarded.The packet is flooded out all interfaces.The packet is forwarded via Serial0/0/0.The packet is forwarded via FastEthernet0/0.

21

Refer to the exhibit. All router interfaces are configured with an IP address and are operational. If no routing protocols or static routes areconfigured, what information will be included in the show ip route command output for router A?

All of the 192.168.x.0 networks will be in the routing table.Routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table.The routing table will be empty because routes and dynamic routes have not been configured.A default route is automatically installed in the routing table to allow connectivity between the networks.

22


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The network shown in the diagram is having problems routing traffic. It is suspected that the problem is with the addressing scheme.What is the problem with the addressing used in the topology?

The address assigned to the Ethernet0 interface of Router1 is a broadcast address for that subnetwork.The subnetwork configured on the serial link between Router1 and Router2 overlaps with the subnetwork assigned to Ethernet0 ofRouter3.The subnetwork assigned to the Serial0 interface of Router1 is on a different subnetwork from the address for Serial0 of Router2.The subnetwork assigned to Ethernet0 of Router2 overlaps with the subnetwork assigned to Ethernet0 of Router3.

23

Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28?Router1Router2Router3Router4

24


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Refer to the exhibit. RIPv1 has been used as a routing protocol on the network. A new 172.16.2.0/24 network has been added on routerR2 and configured under the RIP routing process. When will R1 converge?

after 13 secondsafter 30 secondsafter 180 secondsafter R1 receives triggered updates from R2

25 Which range of IP addresses will be used by RIPv2, EIGRP, and OSPF routing protocols to send routing advertisements?

26


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Refer to the exhibit. All routers are running the same routing protocol. Based on the exhibit and its displayed commands, whichstatement is true?

The wildcard mask is incorrectly configured.A default route must be configured on every router.Routers B, C, and D have no access to the Internet.The network address for the connection to the ISP is not advertised by the routing protocol process.

27

Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are displayed. All routersare operational and pings are not blocked on this network.

Which ping will fail?from R1 to 172.16.1.1from R1 to 192.168.3.1from R2 to 192.168.1.1from R2 to 192.168.3.1

28


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Refer to the exhibit. A network administrator has configured R1 as shown, and all interfaces are functioning correctly. A ping from R1 to172.16.1.1 fails. What could be the cause of this problem?

The serial interface on R1 is configured incorrectly.The default route is configured incorrectly.The default-information originate command must be issued on R1.Autosummarization must be disabled on R1.

29 Which two statements are true regarding link-state routing protocols? (Choose two.)They are aware of the complete network topology.They offer rapid convergence times in large networks.They do not include subnet masks in their routing updates.They rely on decreasing hop counts to determine the best path.They do not work well in networks that require special hierarchical designs.They pass their entire routing tables to their directly connected neighbors only.

30 A network administrator needs to configure a single router to load-balance the traffic over unequal cost paths. Which routing protocolshould the administrator use?

EIGRPOSPFRIPv1RIPv2


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31

Refer to the exhibit. A company uses static routing for its internal network. The network administrator at the HR branch decides to modifythe static routes by adding two commands ip route 172.16.1.0 255.255.255.0 serial 0/0/0 and ip route 172.16.3.0 255.255.255.0 serial0/0/0 on the HR router. What is the effect in the running configuration after adding these two commands?

A total of four static routes will appear.The original two static routes will be replaced by two new static routes.Only the two original static routes will appear. The two new static routes will be discarded.The two new static routes will not appear in the configuration, but are kept in the database as backup.

32


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Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices areproperly configured and the destination network is advertised by both protocols.

Which path will be used to transmit the data packets between PC1 and PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.

33 What are two functions of a router? (Choose two.)It connects multiple IP networks.It controls the flow of data via the use of Layer 2 addresses.It determines the best path to send packets.It manages the VLAN database.It increases the size of the broadcast domain.

34

Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router withoutentering a password?

The login command was not entered on the console line.The enable password should be an enable secret password.No username and password combination has been configured.Console connections cannot be configured to require users to provide passwords.


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35 Which prompt is used to allow a user to change the IP address of an interface on a router?Router>Router#Router(config)#Router(config-if)#

36 Which statement correctly describes a feasible successor in EIGRP?It is a primary route that is stored in the routing table.It is a backup route that is stored in the routing table.It is a primary route that is stored in the topology table.It is a backup route that is stored in the topology table.

37

Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is true regardinghow the routers in this topology will respond to this event?

Router5 flushes the unreachable route from its routing table in 30 seconds.Router4 will learn about the failed route 30 seconds later in the next periodic update.Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0.Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expires.

38

Refer to the exhibit. The network has three connected routers: R1, R2 and R3. The routes of all three routers are displayed. What can beverified from the output?

R1 and R3 are connected to each other via the S0/0/0 interface.The IP address of the S0/0/0 interface of R1 is 10.1.1.2.The IP address of the S0/0/1 interface of R2 is 10.3.3.2.R2 is connected to the S0/0/1 interface of R3.

39


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Refer to the exhibit. All routers are configured with RIPv2 active on all interfaces. Automatic summarization is in effect. Why does therouting table on R3 include the 209.165.200.228/30 network but not the 172.30.1.0/24 and 172.30.2.0/24 networks?

CIDR is required to route supernets.There is no default gateway configured.The 172.30.0.0/16 subnets are discontiguous.RIPv2 cannot route networks with variable subnets.

40

A network administrator has enabled RIP on routers B and C in the network diagram. Which of the following commands will prevent RIPupdates from being sent to Router A?

A(config)# router ripA(config-router)# passive-interface S0/0B(config)# router ripB(config-router)# network 192.168.25.48B(config-router)# network 192.168.25.64A(config)# router ripA(config-router)# no network 192.168.25.32B(config)# router ripB(config-router)# passive-interface S0/0A(config)# no router rip

41 Which multicast address does EIGRP use to send hello and updates packets?224.0.0.5224.0.0.6224.0.0.9


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224.0.0.10

42 Which router component is used to store the routing table?FlashNVRAMROMSDRAM

43

Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routingprotocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighboradjacency.

What action should be taken to solve this problem?Enable the serial interfaces of both routers.Configure EIGRP to send periodic updates.Configure the same hello interval between the routers.Configure both routers with the same EIGRP process ID.

44 What command would the network administrator apply to a router that is running OSPF to advertise the entire range of addressesincluded in 172.16.0.0/19 in area 0?

R1(config-router)# network 172.16.0.0 0.0.0.255 area 0R1(config-router)# network 172.16.0.0 0.0.3.255 area 0R1(config-router)# network 172.16.0.0 0.0.15.255 area 0R1(config-router)# network 172.16.0.0 0.0.31.255 area 0

45

Refer to the exhibit. All routers are configured for OSPF area 0. The network administrator requires that R2 always be the DR andmaintain adjacency.


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Which two configurations can achieve this? (Choose two.)Change the OSPF area of R2 to a higher value.Change the router ID for R2 by assigning the IP address 172.16.30.5/24 tothe Fa0/0 interface.Change the priority values of the Fa0/0 interfaces of R1 and R3 to 0.Configure a loopback interface on R2, with an IP address higher than any IPaddress on the other routers.Configure R1 and R3 with an IP address whose value is higher than that of R2.


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6 of 6 10-12-09 12:07 AM

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46

Refer to the exhibit. What summary address can Router2 advertise to Router1 to reach the three networks on Routers 3, 4, and 5without advertising any public address space or overlapping the networks on Router1?

172.16.0.0/8172.16.0.0/10172.16.0.0/13172.16.0.0/20172.16.0.0/24

47

Refer to the exhibit. RTB is assigned Priority 10 and all other routers use the default priority setting. How will OSPF select the DR onnetwork 10.10.8.4/30?


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The router with the highest priority will become the DR.The router with the highest IP address will become the BDR.Network 10.10.8.4/30 does not require a DR.The router with the highest loopback address will become the DR.

48

Refer to the exhibit. Which two routes are child routes? (Choose two.)10.0.0.010.1.2.010.2.2.0192.168.1.0192.168.2.0

49

Refer to the exhibit. The show cdp neighbors command was run at R1. Which two facts about the newly detected device can bedetermined from the output? (Choose two.)

ABCD is a router that is connected to R1.ABCD is a non-CISCO device that is connected to R1.The device is connected at the Serial0/0/1 interface of R1.R1 is connected at the S0/0/1 interface of device ABCD.ABCD does not support switching capability.

50


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Refer to the exhibit. Hosts on the BOS Fa0/0 LAN are able to ping the Fa0/1 interface on the JAX router and all interfaces on the BOSand ORL routers. Why would hosts from the 10.0.0.0/24 network not be able to ping hosts on the Fa0/0 LAN of the JAX router?

The JAX router has the wrong process ID.The JAX router needs the network 10.0.0.0 0.0.0.255 area 0 command.The JAX router needs the network 192.168.3.0 0.0.0.255 area 0 command.The BOS router needs the network 192.168.3.0 0.0.0.255 area 0 command.


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