Here are the answers to Tuesday's Cisco certification training questions!

CCNA:

Short answer: What's the default priority of an OSPF-enabled Ethernet interface?

Answer: The same as any other type of OSPF-enabled interface - one.


CCNP / BSCI:

RouterA is the DR for a broadcast segment, with RouterB as the BDR. RouterA is rebooted. While RouterA is rebooting, RouterB becomes the DR and RouterC becomes the BDR. What describes RouterA's role five minutes after it comes back online?

A. DR

B. BDR

C. DROther

D. Standby

E. Active

Answer: C. RouterA will become a DROTHER, as it will be neither the DR nor the BDR. With OSPF, a DR/BDR election is not held when a router comes online, or when a router that was previously a DR or BDR comes back online.


CCNP / BCRAN:

Short answer: Given a CIR of 128 KBPS and a time interval of 1/8th of a second, what is the Bc?

Answer: The formula: Bc = CIR x Tc. That makes the Bc (128000 x .125), which equals 16000 - NOT 16000 bps.


CCNP / BCMSN:

Which of the following is defined by IEEE 802.3ad?

A. Portfast

B. LACP

C. PAgP

D. Backbonefast

Answer: B. The Etherchannel negotiation protocol LACP is defined by IEEE 802.3ad.


CCNP / CIT:

Which of the following allows the closest DCE to perform loopback testing?

A. BERT

B. TDR

C. volt-ohm meter

D. cable tester

Answer: A. That's the purpose of a Bit Error Rate Tester (BERT).


See you later today with another set of CCNA and CCNP practice questions!

To your certification exam success,

Chris Bryant
CCIE #12933
http://www.thebryantadvantage.com