Sunday, November 09, 2008

Here are the answers to the Cisco practice exam questions posted on Friday, November 7!

Look for new CCNA tutorials, Video Pop Quizzes, and Video Tutorials coming up later this week!

CCNA Certification And CCENT Certification:

When a Cisco router attempts to load an IOS, from what three locations can it choose (by default), and in what order? Obviously, not all choices here will be used!



C. Flash



F. FTP Server

G. TFTP Server

Answer: After the router passes the POST, it looks for a source from which to load a valid Internetwork Operating System (IOS) image. The router has three sources from which it can load an IOS image, and it's a good idea to know these sources and the order in which the router will look in each for that image:

1. Flash memory (the default).

2. A TFTP server. (Trivial File Transfer Protocol)

3. Read-Only Memory (ROM)

CCNA Security Certification / CCNP ISCW Exam:

You've specified a RADIUS server as the first AAA authentication option in your method list, and then a TACACS+ server. The authentication attempt to the RADIUS server times out. What is the net result?

A. The TACACS+ server will be used for authentication.

B. The authenticating user is denied access.

C. By default, the timeout results in the user being authenticated with full privileges.

D. The timeout results in the user being authenticated, but with restricted privileges.

Answer: A. If the first authentication method listed in the method list times out, the second is used. If the first method returns an authentication failure, that's a different story - the user's authentication attempt fails and the second method is not consulted.

CCNP Certification / BSCI Exam:

When a BGP route reflector receives a route from a RR client, to what BGP router types will the RR reflect that route?

A. clients only

B. nonclients only

C. clients and nonclients

D. neither clients nor nonclients

Answer: C.

CCNP Certification / BCMSN Exam:

Describe what makes Rapid Spanning Tree Protocol more "rapid" than regular STP.

Answer: When a switch running RSTP misses three BPDUs, it will immediately age out the superior BPDU's information and begin the STP recalculation process. Since the default hello-time is 2 seconds for both STP and RSTP, it takes an RSTP-enabled switch only 6 seconds overall to determine that a link to a neighbor has failed.

CCNP / ONT Exam:

What is "TKIP", and what is its role in wireless networking?

Answer: TKIP is the Temporal Key Integrity Protocol, the protocol developed to improve major security issues with WEP. TKIP uses a longer key than WEP and also allows for the use of dynamic keys.

More questions later today!

To your success,

Chris Bryant

CCIE #12933

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