Tuesday, April 15, 2008

Here are the answers to Monday's Cisco CCNA and CCNP practice questions!

CCNA Certification:

What mode of switching gives the most protection against damaged frames?

A. store-and-forward

B. expedited

C. fragment-free

D. cut-through

E. Cisco Accelerated Switching (CAS)

Answer: A. Store-and-forward switching temporarily stores a packet and checks it against the Cyclical Redundancy Check (CRC) field. The entire frame is stored before transmission begins.

The amount of latency with store-and-forward switching is dependent upon the length of the frame; the larger the frame, the greater the latency.

CCNP Certification / BSCI Exam:

The administrative distance of ISIS is ____________.

Answer: 115.

CCNP Certification / BCMSN Exam:

R3's port fast 0/10 is configured with Root Guard. An inferior BPDU is received on that port. What will happen?

A. Nothing.

B. The port will go into root-inconsistent state.

C. The port will go into err-disabled state.

D. The port will go into blocking state.

Answer: A. Root Guard takes no action when an inferior BPDU is received. When a superior BPDU is received, though, the port will go into root-inconsistent state.

CCNP Certification / ISCW Exam:

When you're running an IPSec VPN, what happens to "uninteresting traffic"?

A. It is not sent across the VPN.

B. It is not sent across the VPN and a syslog message is generated.

C. The traffic is transmitted, but it is not protected by IPSec.

D. The traffic is transmitted and protected by IPSec.

Answer: C. The traffic will pass over the VPN but will not be protected by IPSec.

CCNP Certification / ONT Exam:

NBAR can analyze payload contents up to a certain number of bytes. What is that number?

Answer: 400 bytes, but some recent Cisco IOS releases offer a larger capability.

New questions posted later today!

To your success,

Chris Bryant
CCIE #12933

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