Tuesday, February 26, 2008

Here are the answers to your free Cisco and CompTIA certification exam practice questions from Monday, February 25!

CCENT And Network+ Certification Exam:

Name three major differences between TCP and UDP.

While you're at it, name one similarity between them as well!

Answer:

Differences - TCP guarantees delivery, UDP uses best-effort to deliver segments. TCP offers detection and retransmission of lost segments, UDP does not. TCP allows windowing, UDP does not. There are other differences as well.

Similarities - Both operate at the Transport layer of the OSI model, both handle data segments.


CCNA Exam:

At what speed does a T1 line run?

Answer: A T1 line runs at 1.544 MBPS.


CCNP Certification / BSCI Exam:

Short answer: By default, iBGP routers cannot propagate routes to iBGP neighbors that were originally learned from another iBGP router. Name two methods of circumventing this rule.

Answers: Depending on the scenario, you could use route reflectors or BGP confederations.


CCNP Certification / BCMSN Exam:

Identify the true statements regarding SPAN.

A. There can be multiple destination ports for a session.

B. There can be only one destination port for a session.

C. There can be only one source port for a session.

D. There can be multiple source ports for a session.

Answers: B, D. There can be multiple source ports for a given SPAN session, but only one destination port.


CCNP Certification / ONT Exam:

Which of the following queueing methods poses the greatest threat of TCP Global Synchronization?

A. CBWFQ

B. PQ

C. RED

D. WRED

Answer: A. CBWFQ uses Tail Drop as its default method of packet drop. In turn, Tail Drop can lead to TCP Global Synchronization.


See you later today with new questions!

To your success,

Chris Bryant
CCIE #12933
http://www.thebryantadvantage.com/

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