Fragmentation overhead

Question

Suppose a 1500 Byte datagram were to be sent over a link with MTU size of 296. We define IP control overhead as the ratio of control information you add in the form of IP header(s) to the IP payload length. What is the IP overhead of the original datagram i.e. the 1500 Byte datagram? Express answer as a percentage. What is IP control overhead associated with all the fragments? Express overhead in percentage.

Comments

manisha11

you're correct but here it's mentioned

overhead as the ratio of control information you add in the form of IP header(s) to the IP payload length

= 120 /1500

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Yeah @Magma thankyou

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TCP+IP Header=20+20=40

Overhead=6*40/1500=0.16 =16%

Answer 1

Here in this question datagram will be fragmented into 6 parts so considering 20 bytes header of each packet so total it will be 20*6=120 bytes of header or control information and total payload length is 1500 bytes so 120/1500=0.08 if we convert into % it will be 12000/1500=8%.