Tuesday, May 02, 2006

Here are the answer to yesterday's CCNA / CCNP practice questions.

CCNA:

How many valid host IP addresses exist on the 221.10.89.0 255.255.255.248 subnet?

Answer: Six. This is a Class C network, with a network mask of 255.255.255.0 (/24). Comparing the network and subnet masks in binary shows that there are 5 subnet bits and 3 host bits. Using the formula [ (2 to the nth power) - 2 ] to determine the number of valid host addresses, there are six valid addresses on this subnet.

CCNP / BSCI:

There are four routers on an OSPF broadcast network segment. If all OSPF settings are at their default, how many DROTHERS will be on the segment?

Answer: There will be one DR, one BDR, and two DROTHERS - routers that are neither the DR nor the BDR.


CCNP / BCMSN:

What's the name for the network design where the core switches are also the distribution switches?

This is a collapsed core network design.

To your Cisco success,

Chris Bryant
CCIE #12933
www.thebryantadvantage.com

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