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* [[Linux Network Concepts]] | * [[Linux Network Concepts]] | ||
* [[IP Address]] | * [[IP Address]] | ||
=IPv4 Header= | |||
==Version== | |||
==IHL== | |||
==DSCP== | |||
==ECN== | |||
==Total Length== | |||
==Identification== | |||
==Flags== | |||
==Fragment Offset== | |||
==Time To Live== | |||
Eight-bit counter that prevents the datagram being routed endlessly. It represents the ''hop count'': when the datagram arrives at a router, the router decrements TTL field by one. If the value after decrement is zero, the router drops the datagram and sends a "ICMP Time Exceeded" to the sender. The field is used by the [[traceroute]] implementation. | |||
==Protocol== | |||
==Header Checksum== | |||
==Source IP Address== | |||
==Destination IP Address== | |||
==Options== | |||
Latest revision as of 21:00, 3 April 2018
Internal
IPv4 Header
Version
IHL
DSCP
ECN
Total Length
Identification
Flags
Fragment Offset
Time To Live
Eight-bit counter that prevents the datagram being routed endlessly. It represents the hop count: when the datagram arrives at a router, the router decrements TTL field by one. If the value after decrement is zero, the router drops the datagram and sends a "ICMP Time Exceeded" to the sender. The field is used by the traceroute implementation.