It looks like the blog entry with answers to Wednesday's questions disappeared, so here it is again !

CCNA:

What protocol runs on the D-channel in BRI to help set up and tear calls down?

A. ISDN

B. LAPB

C. LAPD

D. PPP

E. HDLC

Answer: C. The exchange of control information used in setting up and tearing down phone calls is out-of-band signaling. The single D-channel in BRI handles this control information, and the two b-channels carry the data.




CCNP / BSCI:

On what OSPF router types can the area range command be used?

A. ABRs only.

B. ASBRs only.

C. ABRs and backbone routers only.

D. Internal routers only.

E. External routers only.

Answer: A. The only router that can run the area range command is the ABR.



CCNP / BCMSN:

When dot1x port-based authentication is in effect, what combination of protocols can pass through the port prior to authentication?

A. STP, CDP, VTP

B. EAPOL, STP, CDP

C. STP, CDP

D. CDP, VTP

Answer: B. EAPOL, STP, and CDP can pass right through the port.


CCNP / BCRAN:

Of the following methods of data transport, which is inherently the least secure?

A. RFC 1483 bridging

B. PPPoE

C. PPPoA

Answer: A. While PPPoE still uses bridging, RFC 1483 bridging is the least secure option.


See you later today with more questions and the answers to Friday's questions!

To your Cisco certification success,

Chris Bryant
CCIE #12933
www.thebryantadvantage.com

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