Ex2

1

Which interface is the default location that would contain the IP address used to manage a 24-port Ethernet switch?

VLAN 1

Fa0/0

Fa0/1

interface connected to the default gateway

VLAN 99

Observable

Description

Max Value

correctness of response 2 points for Option 1

0 points for any other option 2

2

Which three statements are true about using full-duplex Fast Ethernet? (Choose three.)

Performance is improved with bidirectional data flow.

Performance is improved because the collision detect function is disabled on the device.

Nodes operate in full-duplex with unidirectional data flow.

Performance is improved because the NIC is able to detect collisions.

Full-duplex Fast Ethernet offers 100 percent efficiency in both directions.

Latency is reduced because the NIC processes frames faster.

Observable

Description

Max Value

correctness of response Option 1, Option 2, and Option 5 are correct.

1 point for each correct option.

0 points if more options are selected than required. 3

3

What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?

automatically detects duplex settings

automatically detects interface speed

automatically detects copper cable type

automatically assigns the first detected MAC address to an interface

Observable

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4

Which type of cable does a network administrator need to connect a PC to a switch to recover it after the Cisco IOS software fails to load?

a coaxial cable

a console cable

a crossover cable

a straight-through cable

Because there is no Cisco IOS software running on the switch, the administrator needs a console cable to connect the PC to the switch console port to transfer the software from the PC to the switch.

Observable

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5

While troubleshooting a connectivity problem, a network administrator notices that a switch port status LED is alternating between green and amber. What could this LED indicate?

The port has no link.

The port is experiencing errors.

The port is administratively down.

A PC is using the wrong cable to connect to the port.

The port has an active link with normal traffic activity.

Observable

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6

A production switch is reloaded and finishes with a Switch> prompt. What two facts can be determined? (Choose two.)

POST occurred normally.

The boot process was interrupted.

There is not enough RAM or flash on this router.

A full version of the Cisco IOS was located and loaded.

The switch did not locate the Cisco IOS in flash, so it defaulted to ROM.

Observable

Description

Max Value

correctness of response Option 1 and Option 4 are correct.



7

Which command displays information about the auto-MDIX setting for a specific interface?

show interfaces

show controllers

show processes

show running-config

To examine the auto-MDIX setting for a specific interface, the show controllers ethernet-controller command with the phy keyword should be used.

Observable

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8

Refer to the exhibit. What media issue might exist on the link connected to Fa0/1 based on the show interface command?

The bandwidth parameter on the interface might be too high.

There could be an issue with a faulty NIC.

There could be too much electrical interference and noise on the link.

The cable attaching the host to port Fa0/1 might be too long.

The interface might be configured as half-duplex.

Escalating CRC errors usually means that the data is being modified during transmission from the host to the switch. This is often caused by high levels of electromagnetic interference on the link.

Observable

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9

Refer to the exhibit. The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet connections. How should the network administrator change the displayed configuration to satisfy the requirement?

Use SSH version 1.

Reconfigure the RSA key.

Configure SSH on a different line.

Modify the transport input command.

Observable

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10

Which protocol or service sends broadcasts containing the Cisco IOS software version of the sending device, and the packets of which can be captured by malicious hosts on the network?

CDP

DHCP

DNS

SSH

CDP sends periodic broadcasts that contain information such as the device IP address and Cisco IOS software version. A node that is running a packet capturing application can receive these packets and use them for malicious purposes.

Observable

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11

In which type of attack does a malicious node request all available IP addresses in the address pool of a DHCP server in order to prevent legitimate hosts from obtaining network access?

CAM table overflow

MAC address flooding

DHCP starvation

DHCP snooping

In a DHCP starvation attack, a malicious node sends enough DHCP requests to exhaust the available address pool on the DHCP server. With no available IP addresses for the server to assign to nodes attempting to join the network, the attacker has accomplished a denial-of-service attack.

Observable

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12

Which method would mitigate a MAC address flooding attack?

increasing the size of the CAM table

configuring port security

using ACLs to filter broadcast traffic on the switch

increasing the speed of switch ports

Port security can be configured on switches to assist in preventing the MAC address table from being overwhelmed with invalid MAC addresses. ACLs will not assist a switch in filtering broadcast traffic, and increasing the size of the CAM table or the speed of switch ports will not resolve this issue.

Observable

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13

Which two basic functions are performed by network security tools? (Choose two.)

revealing the type of information an attacker is able to gather from monitoring network traffic

educating employees about social engineering attacks

simulating attacks against the production network to determine any existing vulnerabilities

writing a security policy document for protecting networks

controlling physical access to user devices

Network security tools should be used to measure the vulnerability of the current network. They perform two basic functions: security auditing and penetration testing. Security auditing reveals which sort of information an attacker can gather simply by monitoring network traffic. Penetration testing is a simulated attack against the network to determine how vulnerable it would be in a real attack.

Observable

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14

Which action will bring an error-disabled switch port back to an operational state?

Remove and reconfigure port security on the interface.

Issue the switchport mode access command on the interface.

Clear the MAC address table on the switch.

Issue the shutdown and then no shutdown interface commands.

When a violation occurs on a switch port that is configured for port security with the shutdown violation action, it is put into the err-disabled state. It can be brought back up by shutting down the interface and then issuing the no shutdown command.

Observable

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15

Refer to the exhibit. Which S1 switch port interface or interfaces should be configured with the ip dhcp snooping trust command if best practices are implemented?

only the G0/1 port

only unused ports

only the G0/1 and G0/24 ports

only the G0/2, G0/3, and G0/4 ports

only the G0/1, G0/2, G0/3, and G0/4 ports

Switch ports that should be trusted for DHCP messages are those that will receive incoming DHCP messages from DHCP servers. This includes any ports that are directly connected to a DHCP server as well as uplinks to other switches where DHCP servers are connected.

Observable

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16

Refer to the exhibit. Port Fa0/2 has already been configured appropriately. The IP phone and PC work properly. Which switch configuration would be most appropriate for port Fa0/2 if the network administrator has the following goals?

No one is allowed to disconnect the IP phone or the PC and connect some other wired device.

If a different device is connected, port Fa0/2 is shut down.

The switch should automatically detect the MAC address of the IP phone and the PC and add those addresses to the running configuration.

SWA(config-if)# switchport port-security

SWA(config-if)# switchport port-security mac-address sticky


SWA(config-if)# switchport port-security maximum 2







SWA(config-if)# switchport port-security violation restrict

The default mode for a port security violation is to shut down the port so the switchport port-security violation command is not necessary. The switchport port-security command must be entered with no additional options to enable port security for the port. Then, additional port security options can be added.

Observable

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17

Refer to the exhibit. What can be determined about port security from the information that is shown?

The port has been shut down.

The port has two attached devices.

The port violation mode is the default for any port that has port security enabled.

The port has the maximum number of MAC addresses that is supported by a Layer 2 switch port which is configured for port security.

The Port Security line simply shows a state of Enabled if the switchport port-security command (with no options) has been entered for a particular switch port. If a port security violation had occurred, a different error message appears such as Secure-shutdown. The maximum number of MAC addresses supported is 50. The Maximum MAC Addresses line is used to show how many MAC addresses can be learned (2 in this case). The Sticky MAC Addresses line shows that only one device has been attached and learned automatically by the switch. This configuration could be used when a port is shared by two cubicle-sharing personnel who bring in separate laptops.

Observable

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18

Refer to the exhibit. Which event will take place if there is a port security violation on switch S1 interface Fa0/1?

A notification is sent.

A syslog message is logged.

Packets with unknown source addresses will be dropped.

The interface will go into error-disabled state.

Interface FastEthernet 0/1 is configured with the violation mode of protect. If there is a violation, interface FastEthernet 0/1 will drop packets with unknown MAC addresses.

Observable

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19

The network administrator enters the following commands on a Cisco switch:

Switch(config)# interface vlan1

Switch(config-if)# ip address 192.168.1.2 255.255.255.0

Switch(config-if)# no shutdown

What is the effect of entering these commands?

All devices attached to this switch must be in the 192.168.1.0/24 subnet to communicate.

The switch is able to forward frames to remote networks.

The address of the default gateway for this LAN is 192.168.1.2/24.

Users on the 192.168.1.0/24 subnet are able to ping the switch at IP address 192.168.1.2.

Observable

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20

Which two statements are true regarding switch port security? (Choose two.)

The three configurable violation modes all log violations via SNMP.

Dynamically learned secure MAC addresses are lost when the switch reboots.

The three configurable violation modes all require user intervention to re-enable ports.

After entering the sticky parameter, only MAC addresses subsequently learned are converted to secure MAC addresses.

If fewer than the maximum number of MAC addresses for a port are configured statically, dynamically learned addresses are added to CAM until the maximum number is reached.

Observable

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21

Fill in the blank.

_____________________________communication allows both ends of a connection to transmit and receive data simultaneously.

Full-duplex communication improves the performance of a switched LAN, increasing effective bandwidth by allowing both ends of a connection to transmit and receive data simultaneously.

Observable

Description

Max Value

correctness of response Observable 1 receives +1 point if it was answered correctly.

Observable 1 receives +0 points if it was answered incorrectly. 1

22

Fill in the blank.

When port security is enabled, a switch port uses the default violation mode of ________________ until specifically configured to use a different violation mode.

If no violation mode is specified when port security is enabled on a switch port, then the security violation mode defaults to shutdown.

Observable

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The steps are:

1. execute POST

2. load the boot loader from ROM

3. CPU register initializations

4. flash file system initialization

5. load the IOS

6. transfer switch control to the IOS

Observable

Description

Max Value

Options placed in correct order. Click on the question mark at the bottom of the item for the correct answer. There is no partial credit. 2

24

The PT initialization was skipped. You will not be able to view the PT activity.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

Fill in the blank.

Do not use abbreviations.What is the missing command on S1?______________________

The ip address 192.168.99.2 255.255.255.0 command is missing on interface vlan 99, the management VLAN.

Observable

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Documents

Ex2