Multiple choice

What is the result when the command permit tcp 192.168.4.0 0.0.3.255 any eq telnet is entered in an access control list and applied on the inbound interface of a router?

  1. All traffic that originates from 192.168.4.0/24 is permitted.

  2. All TCP traffic is permitted and all other traffic is denied.

  3. All Telnet traffic from the 192.168.0.0/16 network is permitted.

  4. All traffic from the 192.168.4.0/22 network is permitted on TCP port 23.

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The wildcard mask 0.0.3.255 corresponds to a /22 subnet mask (255.255.252.0), which covers the address range 192.168.4.0 through 192.168.7.255. Combined with eq telnet (TCP port 23), this ACL permits only Telnet traffic originating from anywhere in this /22 network to any destination.