The company internetwork is subnetted using 29 bits. Which wildcard mask should be used to
configure an extended access list to permit or deny access to an entire subnetwork?

A.
255.255.255.224

B.
255.255.255.248

C.
0.0.0.3

D.
0.0.0.224

E.
0.0.0.8

F.
0.0.0.7

Explanation:
Class C wild card masks start with 0.0.0.x. The subnet used in this example is 29 bits, or subnet
mask 255.255.255.248. Therefore, we are left with 7 hosts in the final octet (255-248) so the
answer is 0.0.0.7.