Destination Address
6 bytes
6 bytes
2 bytes
Ether
IP
vers
len
TOS
Total length (bytes)
identification
flags
fragment offset
TTL
protocol
checksum
Source IP Address
Destination IP Address
4
4
8
16
16
3
13
8
8
16
32
32
Telnet, SMTP, etc
TCP, UDP
IP, ICMP
Device Driver,
Interface card
4 layers of TCP/IP
protocol suite
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