Q.2. Computer A is communicating with Compeiter II over the fiterset as illustrated in Fize Q2a. Bob created a web server at Compater B for af polyar com. Alice opens a web browser at Compater. A and input hrgp:/Nwwait pobar.enm to browse the website (a) What is the application layer protocol for: (i) identifying the IP address of the web server from the inpot of Alice? (ii) defining the data sent between the client and the web server for the web browsing? (2 magks) (2 trarksi) (b) What are the corresponding transport layer protocols for the application layer protocols in Q2(a)/i) and Q2(a)(ii). respectively? (4 markis) (c) The web server (Computer B) receives the request from the clicnt (Coinguter A). The server applieation then gencrates a block of dara, D, in the application layer, which is to be delivered to the elicnt. (i) With the aid of a diagram similar to that in Fig. Q2b, deseribe the data encapsulation process when data D moves from the application layer to the transport layer, and then to the network layer inside the web server. Describe also the important fields in the headers added in each layer that would be critical for the delivery of the data to the corresponding client application in the client computer (9 marks) (ii) When the data block reaches the data link layer inside the web server, an Ethemet frame is generated. Fig. Q2c shows the structure of an Ethemet frame. What are the functions of the Preamble and FCS fielde? (4 marks) ii) What is stored in the destination address field (in Fig. Q2c) in the Ethernet frame sent out from the web server (Computer B) to the client (Computer A)? What is the role of the owner of this destination address to Computer B? (4 marks)