IPv4 Header Fields (Off/flags)

Total Len

Fragment ID

Source Address

Destination Address

Header

checksum

Frag Offset

TTL

protocol

TOS

ver

IHL

(options)

32 bits wide

Offset: offset of this

frag into original

datagram. If no

frag used, is zero.

MF bit: more frags

to come, zero if

last

DF bit: don’t fragment

me!

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