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CCNA Practice Test - 22
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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?
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A
Traffic using port 25 from the 10.25.132.0/24 is permitted to all destinations.
💡 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.