Tuesday, August 14, 2007

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

CCNA 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).

New questions posted later today!

To your success,

Chris Bryant
CCIE #12933

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