Wednesday, December 10, 2008

Here are the answers to the Cisco practice exam questions posted Tuesday, December 9!

CCNA And CCENT Certification:

What keystroke terminates an in-progress ping or traceroute?

Answer: Ctrl-C. The IOS mentions that there is an abort sequence, but doesn't tell you what it is!

CCNP Certification / BSCI Exam:

Name the four ISIS PDU types.


Link State Packet
Partial Sequence Number PDU (PSNP)
Complete Sequence Number PDU (CSNP)

CCNP Certification / BCMSN Exam:

You're running dot1x-based authentication on a host and Cisco switch. What protocol traffic, if any, will be accepted by the switch port prior to authentication?

Answer: Until the user is authenticated, only the following protocols can travel through the port:


CCNP Certification / ISCW Exam & CCNA Security:

What is DAI, and what purpose does it serve?

Answer: Enabling Dynamic ARP Inspection (DAI) prevents man-in-the-middle attacks on a switch by building a database of trusted MAC-IP address mappings.

CCNP Certification / ONT Exam:

What headers are compressed by cRTP?

Answer: cRTP actually works at both L3 and L4 of the OSI model, since it will compress the 40-byte IP/RTP/UDP headers.

I'll see you later today with new questions, and be sure to read the other recent blog posts for links to my newest Cisco certification videos - all yours, and all free!

To your success,

Chris Bryant
CCIE #12933

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