Ccna certification Practice Tests

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Appendix 

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  Answers to Practice Test Questions

 31.  A.  The Cisco Discovery Protocol (CDP) is required for Cisco VoIP phones. It allows 

the switch to learn capabilities and power requirements. The command 

spanning-tree 

portfast allows the interface on the switch to forward frames as it recalculates the 

switching topology. The command 

switchport nonegotiate stops the switch from 

participating in Dynamic Trunking Protocol (DTP) negotiation. The interface does 

not need to be configured as a trunk port for a VoIP phone to work; an access port is 

recommended.

 32.  D.  The command 

show interfaces switchport will display a detail of all ports in 

respect to VLAN operational status. The command will show the operational mode of the 

interface, such as trunk or access mode. The command 

show vlan will show all VLANs 

configured on the switch. Although the command 

show running-config will display 

the running configuration of the port, it will not display the status of the interface. The 

command 

show interfaces will not display the VLAN configured on the port.

 33.  D.  The proper way to enable a VLAN to forward traffic is to first enter the VLAN 

database for ID 3 and then issue the 

no shutdown command. On some IOS versions, this 

can also be done via the command 

no shutdown vlan 3 from global config mode. The 

command 

enable vlan 3 configured in privilege exec mode is not a valid command.  

The command 

enable vlan 3 configured in global configuration is not a valid command. 

Although the command 

no shutdown vlan 3 is valid on some IOS versions, it must be 

configured from global configuration mode.

 34.  C.  The command 

show interfaces FastEthernet 0/3 switchport will show the 

switch port details for only Fa0/3, to include its operational mode. This command is 

similar to 

show interfaces switchport, which will show all ports. The command 

show interfaces will not show the operation mode of only Fa0/3. The command show 

interfaces status | i 0/3 will filter the results and only display the line with the 

matching text of 0/3. These lines will not give you the operational mode of the interface.

 35.  B.  The VLAN is disabled from forwarding traffic as shown in the VLAN database. The 

no shutdown vlan 5 must be performed in global config. The VLAN interface being 

shut down would have no effect on traffic being forwarded on the VLAN, only routed. If 

the guest ports are associated with the proper VLAN in the exhibit, routing will function 

as normal. There could be a problem elsewhere, but the exhibit shows the VLAN as shut 

down.

 36.  A.  You should first create the VLAN in the VLAN database and add its name. These 

actions should be performed on the VTP server, when multiple switches are installed in 

the network. Then you need to enter the interface and configure the port for the VLAN. 

All other answers are incorrect.

 37.  B.  VLAN 4 is an active VLAN. However, it has not been given a name, so the default 

name is VLAN0004. The VLAN is not shut down as it has a status of active. The VLAN 

could have been created on a non-Cisco switch. However, the exhibit is from a Cisco 

switch, and the friendly name is not configured. VLANs cannot be suspended, only shut 

down, which is clearly not the problem in the exhibit.

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Chapter 2: Network Access (Domain 2)