Users cannot access a webserver and after the traffic is captured, the capture too* shows an ICMP packet that reports "communication administratively prohibited" What Is the cause of this webserver…

Question

Options

• AAn access list along the path is blocking the traffic
• BThe traffic is not allowed to be translated with NAT and dropped.
• CUsers must authenticate on the webserver to access It
• DA router along the path is overloaded and thus dropping traffic

• A
  95% (59)
• C
  3% (2)
• D
  2% (1)

Explanation

The correct answer is A. The ICMP 'Destination Unreachable - Communication Administratively Prohibited' message (Type 3, Code 13) is explicitly generated when an Access Control List (ACL) on a router or firewall denies a packet. The word 'administratively' is the key indicator-it means a network policy or rule (i.e., an ACL) is intentionally blocking the traffic, not a routing or reachability failure. Answer B (NAT) is incorrect; NAT failures produce different errors or silent drops. Answer C is incorrect; web authentication is an application-layer mechanism and does not generate ICMP messages. Answer D is incorrect; an overloaded router would drop packets without sending ICMP 'administratively prohibited'.

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