Ccna certification Practice Tests

290

 

Appendix 

■

  Answers to Practice Test Questions

 47.  C.  The command 

switchport trunk allowed vlan remove 2-4 will remove VLANs 

2 through 4 from the trunk. The command 

switchport trunk remove vlan 2-4 is 

incorrect. The command 

switchport remove vlan 2-4 is incorrect. The command 

switchport trunk allowed remove vlan 2-4 is incorrect.

 48.  D.  The command 

switchport trunk allowed vlan all will restore the allowed 

VLAN list back to default. The command 

no switchport trunk allowed is incorrect. 

The command 

no switchport trunk allowed all is incorrect. The command no 

switchport trunk allowed 1-4096 is incorrect.

 49.  A.  The command 

switchport trunk allowed vlan add 4 will add VLAN 4 to the 

existing list of VLANs already allowed on the interface. The command 

add allowed 

vlan 4 is incorrect. The command switchport trunk add vlan 4 is incorrect. The 

command 

switchport trunk allowed add vlan 4 is incorrect.

 50.  C.  The command will not complete because the interface is set to dynamic auto, which 

implies the trunk protocol will be negotiated. You cannot configure it with 

switchport 

mode trunk until you statically set the encapsulation via the command switchport 

trunk encapsulation dot1q. The command switchport mode trunk manual 

is incorrect. The command 

no switchport mode dynamic auto is incorrect. The 

command 

no switchport trunk encapsulation auto is incorrect.

 51.  B.  VLAN Trunking Protocol, or VTP, propagates the VLAN database from an initial 

master copy on the “server” to all of the “clients.” VTP does not help facilitate the 

dynamic trunking between links. VTP does not detect trunk encapsulation and negotiate 

trunks. VTP allows for the propagation of the VLAN database, not the trunking 

database.

 52.  B.  A switch in VTP transparent mode will not participate in VTP. However, if the VTP is 

v2, the switch will forward and receive VTP advertisements. The VTP server mode allows 

the switch to act as a master for the VTP domain. VTP proxy mode is not a real mode; 

therefore, it is incorrect. The VTP client mode allows the switch to act as a slave to the 

master server.

 53.  D.  Both switches have a native VLAN mismatch. Since Switch B has an inactive VLAN, it 

would be recommended to change the native VLAN back to 1 on Switch B. When VLAN 

pruning is enabled, it will not affect traffic between switches. Both switches show that a 

link has been enabled with 802.1Q; therefore, there are no incompatibility issues.

 54.  B.  VTP VLAN pruning removes forwarding traffic for VLANs that are not configured 

on remote switches. This saves bandwidth on trunks because if the remote switch does 

not have the VLAN configured on it, the frame destined for the VLAN will not traverse 

the trunk. VTP VLAN pruning does not remove VLANs from the database of other 

switches. VTP VLAN pruning also does not automatically change the allowed VLANs on 

interfaces.

---

Chapter 2: Network Access (Domain 2)