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Wendell Odom. Cisco CCNA Exam
Q. 52
What is a benefit of a virtual LAN (VLAN)?
A.It increases the number of broadcast domains.
B.It decreases the number of broadcast domains.
C.It increases the number of collision domains.
D.It decreases the number of collision domains.
E.Since it is a virtual interface, it never shuts down.
Answer: A
Explanation: A VLAN is a logical broadcast domain that can span multiple physical LAN segments. A VLAN can be designed to provide independent broadcast domains for stations logically segmented by function, project teams, or application without regard to the physical location of the users. Due to this the number of broadcast domains increase.
Incorrect Answers:
B is incorrect; the broadcast domains actually increase not decrease.
C is incorrect; there is no direct effect on collision domains.
D is incorrect; there is no direct effect on collision domains.
E is incorrect; virtual interfaces can be shut down.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages
Q. 53
IP RIP routing is configured on a router, but all interfaces attach to RIP network. What should you use to prevent all RIP routing updates from being sent through selected interfaces without using access lists?
A.Passive route
B.Default routes
C.Passive interface
D.Route update filtering
Answer: C
Explanation: The passive interface command will prevent the sending of RIP updates.
Incorrect Answers:
A is incorrect; passive routes as used with IGRP and not RIP.
B is incorrect; default/static routes will not prevent RIP updates.
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