Friday, June 13, 2008

Welcome back! It's Friday, June 13, and here are the answers to yesterday's practice exam questions.

Over the weekend, I'll post a new set of CCNA questions on the main site - watch for the link here on the blog! Server 2008 Certification questions are on their way as well....

CCENT And Network+ Certification:

Name the three RFC 1918 private address ranges from which host addresses can be assigned. Include the masks.

Also, name the address ranges from which host addresses cannot be assigned, and briefly describe the purpose of each.

Answer: The three private address ranges we can assign to hosts are...

Class A: /8

Class B: /12

Class C: /16

The ranges that can't be assigned are ..

Class D: Reserved for multicasting, -

Class E: Experimental, -

Also, the /8 range is reserved for loopback addresses.

CCNA Certification:

By default, how many paths does RIP use for unequal-cost load-sharing?

A. 2

B. 3

C. 4

D. 6

E. 8

F. None of the above.

Answer: F. RIP performs no default unequal-cost load-sharing.

CCNP Certification / BSCI Exam:

An OSPF-enabled router receives an LSA. The sequence number is lower that the most recent LSA received for that link. What will the receiving router do?

A. Accept the update and update its OSPF database.

B. Accept the update and take no further action.

C. Accept the update, update its database, and flood the changes.

D. Ignore the update and take no further action.

E. Ignore the update and send an LSU back to the original sender.

Answer: E. If a router running OSPF receives an update with an LSA that has a lower sequence number than the one it already has in its database, that indicates that the just-received LSA is not the latest information regarding that link.

The receiving router will not only ignore the update, but will send an LSU containing the latest LSA regarding that link back to the original sender.

CCNP Certification / BCMSN Exam:

Identify the true statements regarding SPAN.

A. There can be multiple source ports per session.

B. There can be only one source port per session.

C. There can be multiple destination ports per session.

D. There can be only one destination port per session.

Answers: A, D. You can have multiple source ports, but only one destination port.

CCNP Certification / ISCW Exam:

Which of the following are asymmetric keys?


B. Diffie-Hellman




Answers: B, C. These keys use separate values to encrypt and decrypt data. Symmetric keys use the same value for both operations. DES, 3DES, and AES are all symmetric.

CCNP Certification / ONT Exam:

Which of the following are examples of Layer Two traffic marking?

A. CoS





F. IP Precedence


Answers: A, B, D, E, G. Both DSCP and IP Precedence are Layer Three traffic marking techniques.

New questions posted later today, and be sure to read today and yesterday's blog postings for link to new CCNA practice exam questions that have been posted on the main site!

To your success,

Chris Bryant
CCIE #12933

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