Sunday, July 30, 2006

I seem to have had some posts disappear, so once again, here are the answers to Friday's Cisco CCNA and CCNP practice questions!

CCNA:

What are the default criteria used to permit or deny traffic in an extended ACL?

Answer: In an extended ACL, both the source and destination IP addresses will be considered.

CCNP / BSCI:

What BGP attribute is specifically designed to prevent routing loops?

Answer: The AS_PATH attribute; if a router receives a BGP packet and sees its own AS number in the AS_PATH, that router knows a routing loop has occurred.

CCNP / BCMSN:

What interface-level command would place a port into a mode where it could send or receive data, but not do so simultaneously?

Answer: This describes half-duplex Ethernet, so the correct command will be duplex half.

CCNP / BCRAN:

What form of load balancing uses NAT as its primary mechanism?

Answer: TCP Load Distribution uses NAT.

CCNP / CIT:

What command output contains the following TCP and UDP statistics?

UDP statistics:
Rcvd: 0 total, 0 checksum errors, 0 no port
Sent: 2 total, 0 forwarded broadcasts

TCP statistics: Rcvd: 0 total, 0 checksum errors, 0 no port
Sent: 0 total

Answer: That's the partial output of show ip traffic.

I'll have Saturday's answers up in just a few minutes!

Chris Bryant
CCIE #12933
www.thebryantadvantage.com

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