Which of the following firewall rules will block destination telnet traffic to any host with the source
IP address 1.1.1.2/24?
A.
Deny any source host on source port 23 to destination any
B.
Deny any source network 1.1.1.0/24 to destination any on port 23
C.
Deny source host 1.1.12 on source port 23 to destination any
D.
Deny any source network 1.1.1.0/24 with source port 23 to destination any
Answer B denies the entire 1.1.1.0/24 network from accessing any telnet service. Telent operates on port 23. Destination any prevent the network from accessing any node via telnet.
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