IPv4 Header Fields (IHL)

Total Len

Fragment ID

Source Address

Destination Address

Header

checksum

Frag Offset

TTL

protocol

TOS

ver

IHL

(options)

32 bits wide

IHL: # 32 bit words

in IP header. Min

is 5 (20 bytes),

max is 15 (60

bytes). Thus,

at most 40 bytes

of options.

Previous slide

Next slide

Back to first slide

View graphic version