Friday, June 22, 2007

Welcome! Here are the answers to Thursday's Cisco CCNA and CCNP exam practice questions!

CCNA Certification Exam:

Two OSPF routers connected via an Ethernet segment are exchanging Hello packets. How often will these packets be sent?

A. Every 5 seconds.

B. Every 10 seconds.

C. Every 30 seconds.

D. Every 120 seconds.

E. OSPF speakers do not send Hellos on an Ethernet segment.

Answer: B. On a broadcast network such as an Ethernet segment, OSPF speakers send hellos every 10 seconds, as shown below.

R2#show ip ospf interface ethernet0
Ethernet0 is up, line protocol is up
Internet Address, Area 23
Process ID 1, Router ID, Network Type BROADCAST, Cost: 10 Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID), Interface address Backup Designated router (ID), Interface address
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5

CCNP Certification / BSCI Exam:

A non-Cisco router will consider what value first during the BGP best path selection process?

A. weight



D. origin



Answer: C. Weight is considered first, but weight is Cisco-proprietary. A non-Cisco router will not understand the weight attribute, so local preference (LOCAL_PREF) is then used.

CCNP Certification / BCMSN Exam:

Short answer: Identify and briefly describe the port security modes.

Answer: Protect drops data with non-secure MAC addresses; Restrict does the same while generating a syslog message; Shutdown places the port into error-disabled mode.

CCNP Certification / ISCW Exam:

Identify the true statements regarding IPSec Transport mode.

A. Uses the original IP header

B. Replaces the original IP header with a transport header

C. The IP header is encrypted

D. The IP header is not encrypted

Answers: A, D. Transport mode uses the original IP header, and the IP header is not encrypted.

CCNP Certification / ONT Exam:

What term refers to traffic being dropped because the queue is full?

Answer: That's tail drop, which can lead to all sorts of problems, which we'll talk about in future blog postings!

New questions later today!

To your success,

Chris Bryant
CCIE #12933

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