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A user issues a ping 2001:db8:3040:114::88 command and receives a response that includes a code of 4. What does this code represent?

  • port unreachable
  • host unreachable
  • protocol unreachable
  • network unreachable
Explanation & Hint:

An ICMPv6 code of 4 in a ping response typically represents “port unreachable.” This code indicates that the destination host has received the ICMPv6 Echo Request, but the specific port or service requested by the ping is unreachable or not available on the destination host. It’s commonly used in situations where a network device or firewall has blocked access to the specified port or service on the destination host.

 

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CCNA 1 v7 – ITN v7.02 – Modules 11 – 13: IP Addressing Exam Answers Full 100%