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Write all the parts answers in perfectly in text form. Question 4 Analyse the header of the IPv4 datagram shown in Figure 4.1 in order
Write all the parts answers in perfectly in text form.
Question 4 Analyse the header of the IPv4 datagram shown in Figure 4.1 in order to solve the following problems: (1) Prove using the information available there that the IPv4 datagram cannot carry payload obtained from the Transport Layer which is larger than 65, 495 bytes. [30%] 32 Bits 1 2 3 4 5 6 7 8 9 10 11 1213 14 15 16 17 18 19 20 21 22 23 24 2526 27 28 29 30 31 32 Version IHL Type of service Identification Time to live Protocol Source address Destination address Total length Fragment offset Header checksum Options (0 or more words) [25%] Figure 4.1 The IPv4 datagram header. (ii) The value of IHL field in a particular IPv4 datagram is 12. How many Option bytes are present in the datagram? (iii) Explain how the datagram security is implemented in IPv4 protocol. (iv) Explain what is the purpose and the main functions of the Options field in IPv4? [20%] [25%]
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