Sunday, July 15, 2007

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

CCNA Exam:

Short answer: The binary string 11010101, converted to hex, equals ____________ .

Answer: The bits set to 1 are 128, 64, 16, 4, and 1 -- add 'em up and they equal 213.

CCNP Certification / BSCI Exam:

Short answer: The default OSPF cost of an ethernet interface is ____________.

Answer: The formula OSPF uses to calculate an interface's cost is 100,000,000 / bw in bits, which comes out to 10 for an ethernet interface.

CCNP Certification / BCMSN Exam And ONT Exam:

Identify the true statements regarding RED.

A. Packets are dropped before the queue fills completely.

B. Packets are dropped only when the queue fills completely.

C. CoS and IP Precedence identify the packets to be dropped.

D. CoS and IP Precedence cannot be used with RED.

E. RED is effective with TCP-based traffic.

F. RED is effective with UDP-based traffic.

Answers: A, D, E. Random Early Detection (RED) does drop packets before the queue is completely full - that's where the "early detection" part comes in! RED doesn't take IP Precedence or CoS into account - that's where the "random" part comes in! : )

Both RED and WRED (Weighted Random Early Detection) are valid only with TCP-based traffic.

CCNP Certification / ISCW Exam:

Which of the following best describes the characters available to use as "delimiting characters" in a login banner?

A. You can only use the "%" sign.

B. You can use any character.

C. You can use any non-numeric character.

D. You can use any character that doesn't appear in the login message itself.

Answer: D. While you do usually see the "%" sign used in login banner documentation, it's not required. What is required is that you don't use a character that appears in the login message.

New questions posted later today!

To your success,

Chris Bryant
CCIE #12933

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