Chapter 7

1. A and D. The wildcard mask is used for matching the prefix only, and not the prefix length. As such, 172.16.1.0 0.0.0.255 matches all addresses that begin with 172.16.1, and 172.16.0.0 0.0.255.255 matches all addresses that begin 172.16. Also, OSPF reviews the network command with the most specific wildcard masks (wildcard masks with the most binary 0s) first, so an interface IP address beginning with 172.16.1 matches the command that references area 8.

2. D. ABRs, by definition, connect the backbone area to one or more nonbackbone areas. To perform this function, a router must have at least one interface assigned to the backbone area and at least one interface assigned to a nonbackbone area.

3. B and C. First, for the two correct ...

Get CCNP Routing and Switching ROUTE 300-101 Official Cert Guide now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.