312-49 · Question #356
What does ICMP Type 3/Code 13 mean?
The correct answer is A. Administratively Blocked. ICMP Type 3 indicates a 'Destination Unreachable' message. The Code value specifies the reason. Code 13 means 'Communication Administratively Prohibited,' commonly referred to as 'Administratively Blocked.' This is typically returned when a firewall or ACL (Access Control List)…
Question
What does ICMP Type 3/Code 13 mean?
Options
- AAdministratively Blocked
- BHost Unreachable
- CProtocol Unreachable
- DPort Unreachable
How the community answered
(22 responses)- A95% (21)
- B5% (1)
Explanation
ICMP Type 3 indicates a 'Destination Unreachable' message. The Code value specifies the reason. Code 13 means 'Communication Administratively Prohibited,' commonly referred to as 'Administratively Blocked.' This is typically returned when a firewall or ACL (Access Control List) rule explicitly blocks the traffic. Other common codes under Type 3 include Code 1 (Host Unreachable), Code 2 (Protocol Unreachable), and Code 3 (Port Unreachable).
Topics
Community Discussion
No community discussion yet for this question.