Multiple choice

What is the result when the command permit tcp 10.25.132.0 0.0.0.255 any eq smtp is added to a named access control list and applied on the inbound interface of a router?

  1. TCP traffic with a destination to the 10.25.132.0/24 is permitted.

  2. Only Telnet traffic is permitted to the 10.24.132.0/24 network

  3. Ttraffic from 10.25.132.0/24 is permitted to anywhere on using any port.

  4. Traffic using port 25 from the 10.25.132.0/24 is permitted to all destinations.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The ACL command 'permit tcp 10.25.132.0 0.0.0.255 any eq smtp' permits TCP traffic from source network 10.25.132.0/24 (wildcard mask 0.0.0.255) to any destination, but only for port 25 (SMTP). Option A is wrong because it reverses source/destination. Option B is wrong because it specifies Telnet (port 23) and the wrong network. Option C is wrong because it claims 'any port' when only SMTP (25) is permitted. Option D correctly identifies that traffic from 10.25.132.0/24 using port 25 can go to any destination.

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