Friday, July 20, 2007

Here are the answers to Thursday's Cisco exam practice questions!

CCNA Certification:

What value(s) does a Cisco switch use to dynamically build its bridging table?

A. Source MAC address

B. Destination MAC address

C. Source IP address

D. Destination IP address

Answer: A. One reason switches examine the source MAC address of a frame first is to use that information to build and refresh its bridging table (MAC address table).

CCNP Certification / BSCI Exam:

Short answer: What LSA type describes links external to the OSPF domain?

Answer: Type 5 LSAs describe links external to the OSPF domain.

CCNP Certification / BCMSN Exam:

RADIUS uses which of the following?






Answer: B.

CCNP Certification / ISCW Exam:

What form of packet switching is considered the fastest?

A. Process switching

B. CEF switching

C. Fast switching

D. CDP switching

Answer: B. CEF switching is faster than fast switching, which in turn is faster than process switching. There's no such thing as CDP switching.

CCNP Certification / ONT Exam:

Short answer: What is VAD, and what is its basic purpose? Hint: The "V" stands for Voice.

Answer: Voice Activity Detection (VAD) does much what it sounds like it does - it detects when you're talking and when you're not. VAD stops transmission when you're not saying anything in a VoIP conversation, which helps to save bandwidth.

New questions posted later today!

To your success,

Chris Bryant
CCIE #12933

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