An IP datagram has arrived with the following information in the header(hex):
45000054 00030000 2006...
A.) What is the header size?
B.) Are there any options in the packet?
C.)What is the size of the data?
D.)Is the packet fragmented?
E.)How many more routers can the packet travel to?
F.)What is the protocol number of the payload being carried by the packet?
Solution
Answer:
We have given IP datagram derived with the information in Hex : 45000054 00030000 2006
Now , here we divide this information as the following :
A) Size of the header = 5 x 4 bytes = 20 Bytes
B) No, As you can see above
C) Length of the data = Total Length - HLEN = 84 - 20 = 64 Bytes
D) Yes
E) 32 Hops , so 32 routers . The last router will discard the datagram.
4 5 00 0054 0003 0000 20 06

Type Version HLEN Service Total Fragment Offset ID Flag TTL Protocol