Question (a) Consider that you enter the subsequent URL in the address bar of a popular web client and that both the server and client accepts HTTP version 1.1.

i. What can be the initial request made by the client?

ii. Describe how HTTP version 1.1 allows 'surfing' experience to be greatly improved.

iii. Provide a sample HTTP request message with at least 4 main header lines that is sent by the web client.

iv. Consider that the web resource is actually found on the server, give at least 3 header lines that you can expect in the sample response HTTP message.

Question (b) Integrity and Authentication are two important network security services.

i. Describe what you understand by authentication.

ii. Give one mechanism that will be used to enforce both authentication and data integrity and illustrate briefly how it works.

iii. Explain one mechanism that you can use to ensure data integrity alone during transmission.