Consider applications running on two hosts connected as per Figure 2 (7wo applications communicating across a network. The applications are communicating with each other across the network using TCP/IP. This communication results in a number of encapsulated PDUs moving across the network with each PDU containing addressing information, You are required to: (i) Identify and illustrate, for each direction of communication, the correct sequence of encapsulated PDUs contained in the transmitted PDUs X and Y as per the figure. In your illustration identify the type of PDU used at each of the protocol layers and identify all addressing identifiers (source and destination) used in cach of the PDU headers. Assumo that the Data Field is on the right hand side of PDUs X and Y. (5 marks) (ii) For PDUs X and Y, explain where and how any of the addresses contained in the PDU headers (including the encapsulated PDUs) may change. (5 marks) (11) Identify, for each of the hosts, how the local TCP entity would represent the connection using Socket Pair notation. (5 marks) Refer to the diagram for Port and IP address identifiers. For MAC addresses, use the terms "Host A MAC", "Router A-side MAC" etc, Host A Application running on Port 1234 200.100.0.55 Host B Application running on Port 80 147.252.10.30 200.100.0.1 S 2 Router 147.252.10.1 r Figure 2: Two applications communicating across a network