Wednesday, April 02, 2008

Here are the answers to the first of two sets of Cisco certification exam practice questions that were posted Tuesday, April 1!

CCNA And CCENT Certification Exam:

Host A wants to send data to Host B. Host A knows Host B's IP address, but not its MAC address. There are two switches and a hub between the two hosts. What protocol will allow Host A to transmit data successfully to Host B?


B. Inverse ARP


D. Proxy ARP

Answer: A. ARP can work successfully in this situation, since there are no routers in the path between Host A and Host B. ARP broadcasts will successfully be forwarded by the switches.

CCNP Certification / BSCI Exam:

Given the following routing table excerpt, what local interface will traffic destined for use to exit the router?

R /24 [120/2] via ethernet0
I /23 [100/4253] via ethernet1
R /24 [120/2] via serial0
O /23 [110/20]via serial1

Answer: The load will be shared over the two RIP paths. They have the longest prefix for the route (/24), and since the metrics are equal, they will equal-cost load-share over the two paths. Hopefully you'll only see a routing table like that on an exam or here in a practice question!

CCNP Certification / BCMSN Exam:

Short answer: You want to connect a router's AUI port to a switch port. What kind of cable will you need?

Answer: You'll need a straightthrough cable as well as a transceiver.

CCNP Certification / ISCW Exam:

Short answer: Packet filtering can use information from what OSI model layer headers to permit or deny traffic?

Answers: Packet filtering can match against both L3 and L4 criteria.

CCNP Certification / ONT Exam:

Cisco routers support three types of digital phone ports. Name them.

Answer: Our old friend ISDN, along with Common Channel Signaling (CCS) and Channel Associated Signaling (CAS).

Answers to the second set of yesterday's questions coming right up!

To your success,

Chris Bryant
CCIE #12933

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