Question

You want to create an ACL that prevents all traffic sent from network ___. Which wildcard mask value would you use?

1) 0.0.0.0
2) 255.255.255.255
3) 0.0.0.255
4) 255.255.255.0

Answer 1

To create an ACL that prevents all traffic sent from a specific network, a wildcard mask of 0.0.0.0 should be used, as it ensures an exact match with no variations allowed.

Step-by-step explanation:

The question is about creating an Access Control List (ACL) that prevents all traffic sent from a particular network. In the context of ACLs in networking, a wildcard mask is used to specify which bits of an IP address should be considered relevant when determining a match. To deny all traffic from a specific network, you'd want to match the entire network precisely, which means the wildcard mask should be 0.0.0.0. This mask indicates that all bits must match exactly, and no variation is allowed. Therefore, the correct answer is option 1) 0.0.0.0.