Ccna certification Practice Tests

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Appendix 

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  Answers to Practice Test Questions

 32.  C.  Switch B has the lowest MAC address of all of the switches. Therefore, Switch B will 

become the RSTP root bridge. All ports leading back to Switch B will become the root 

ports. Switch A interface Gi1/8, Switch D interface Fa2/16, and Switch C interface Gi1/3 

will become root ports. All of the other options are incorrect.

 33.  C.  The 802.1w Rapid Spanning Tree Protocol (RSTP) defines that designated switch 

ports always forward traffic. The designated port is a port that is forwarding traffic and is 

opposite of the root port or blocking port if it is a redundant link. A disabled switch port 

does not participate in RSTP or the forwarding of traffic. A backup port is a redundant 

port on the same switch and segment that is placed in a blocking mode in the event the 

forwarding port is unable to forward traffic. An alternate port is a redundant port on the 

same segment, but different switches. The alternate port is placed in a blocking mode, 

and in the event the forwarding port is unable to forward traffic, the alternate port will 

forward traffic.

 34.  A.  The command 

spanning-tree portfast default will configure all access ports on 

the switch as PortFast enabled. The command 

switchport spanning-tree portfast is 

incorrect. The command 

spanning-tree portfast enable is incorrect. The command 

spanning-tree portfast is incorrect.

 35.  A.  Monitor mode can be used for analysis of the radio spectrum. Analysis mode is not 

a real mode; therefore it is an incorrect answer. FlexConnect mode is a switching mode 

on the wireless access point (WAP) in which traffic is switched directly to the intended 

destination. Local mode is a switching mode on the wireless access point in which all traffic 

is directed to the wireless controller before being switched to the intended destination.

 36.  D.  WorkGroup Bridge mode allows you to connect an AP to another AP via an SSID. The 

Ethernet connection is then bridged over to allow other wired connections to share the 

wireless bridge. A wireless mesh is used for wireless coverage where wired APs cannot be 

installed. LightWeight mode is a wireless AP mode in which the wireless LAN controller 

controls the AP. Local mode is a switching mode on the wireless access point (WAP) in 

which all traffic is directed to the wireless controller before being switched to the intended 

destination.

 37.  B.  When an EtherChannel is configured to an “on mode,” it means that no negotiation 

protocol will be used to build the EtherChannel. If the mode of auto or desirable is 

configured on the EtherChannel interfaces, then the EtherChannel will participate in Port 

Aggregation Protocol (PAgP). If the mode of passive is configured on the EtherChannel 

interfaces, then the EtherChannel will participate in Link Aggregation Control Protocol 

(LACP).

 38.  C.  TACACS+ is a Cisco-defined protocol. One of the useful features it has is that it can 

authenticate a user and only allow that user to access certain commands on the router or 

switch. The TACACS+ protocol is not an open standard. The TACACS+ protocol encrypts 

the passwords for the user but does not support authenticating a user for a specific length 

of time.

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Chapter 7: Practice Exam 1