a. Describe the flow control mechanism and Sliding window protocol in step by step process.Construct a network with two nodes let it be client and server. Assign IP address for each node using Class B addressing and send packets from node client to server.Check Control flow mechanism between node client and server to avoid packet loss. DATA :12345678 WINDOW SIZE : 4 b. A router with IPV4 address 125.45.23.12 and Ethernet physical address 23:45:AB:4F:67:CD has received a packet for a host destination with IP address 125.11.78.10 .Shows the entries in the ARP request packet sent by the router .Assume no subnetting a. Generate the code word using CRC for Data:100100 and divisor-1101. b. Explain in detail about the protocol using in transport layer ,for connection oriented services while transmitting the data from sender to receiver after identify the path using the routing protocol in network layer.