A user issues a ping fe80:65ab:dcc1::100 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 represents “port unreachable.” This code is typically used to indicate 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. |