Here are the answers to Thursday's CCNA, CCNP, and Network+ exam questions!

CCNA:

Short answer: What's the MAC address of a broadcast?

Answer: ff-ff-ff-ff-ff-ff, also expressed as FF-FF-FF-FF-FF-FF. The case of a hex value does not affect its value.

Network+:

Which of the following devices run at Layer 1 of the OSI model?

A. hub

B. repeater

C. switch

D. router

Answers: A, B. Repeaters and hubs are both L1 devices.


CCNP / BSCI:

By default, iBGP routers cannot propagate routes to iBGP neighbors that were originally learned from another iBGP router. Which of the following describe methods of circumventing this rule?

A. turning synchronization off

B. turning synchronization on

C. turning split horizon on

D. turning split horizon off

E. configuring route reflectors

F. changing the weight attribute

G. configuring confederations

Answers: E, G. Route reflectors and confederations are two popular methods of getting around the BGP split horizon rule.


CCNP / BCMSN:

Short answer: R3's port fast 0/10 is configured with Root Guard. An inferior BPDU is received on that port. What will happen?

Answer: Nothing. Root Guard protects against superior BPDUs, but takes no action on a port receiving an inferior BPDU.


CCNP / BCRAN:

Once a cable modem is powered on, what's the first thing it needs to do?

A. Acquire QAM Lock

B. Send a SYNC message

C. Send a SYN-ACK message

D. Send a MAP message

E. Acquire an RF signal

Answer: E.


CCNP / CIT:

Short answer: You're running a traceroute, and you start getting asterisks on line 2. To avoid watching asterisks all the way to line 30, what key combination should you use to abort the traceroute?

Answer: Just enter twice in rapid succession.


See you in just a few minutes with the answers to Friday's CCNA, CCNP, and Network+ exam questions!

To your certification exam success,

Chris Bryant
CCIE #12933
www.thebryantadvantage.com