Layer 3 - IP datagram

• Protocol = 6 means data portion contains a TCP segment. Protocol = 17 means UDP.

IHL

Type of Service

Total Length

Version

Fragment Offset

Identification

Flags

Time to Live

Protocol

Header Checksum

Source Address

Destination Address

• Version = 4

• If no options, IHL = 5

• Source and Destination are 32-bit IP addresses

Data

Padding

Options

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