Complete work contains four files named: -->server_tcp.cpp -->client_tcp.cpp -->server_udp.cpp -->client_upd.cpp

Execution of the files is as shown below: -->./server port -->./client host port -->./server port packetSize sleepTime -->./client host port packetSize

TCP Server: -->The TCP/IP server basically creates server instance which listens to port specified as an argument and waits for a client to connect to it. -->Once a client connects to it and sends a message it prints the details of the client to its standard error and the message received to its standard output. -->And continues to listen as long as the client sends data. -->Once the client is done and disconnects, server closes the sockets and exits. -->If the data is piped from a file then the server detects the end of file and closes the connection.

TCP client: -->The TCP client connects to a given TCP server and starts the conversation. -->Once done terminates the connection with the server. -->The buffer size for the TCP server and client communication is hard coded to 1024.

UPD Server: -->The UDP server creates a server instance which listens to port specified as argument. -->Once it receives a message from the client it goes to sleep for a specified time (in milli secs) and then sends an acknowledgement back to the client with a sequence number of the message. -->It repeats the same for 30 messages, closes the connection and then exits.

UPD Client: -->The UDP client creates a client instance which sends 30 messages of specified size to the server and waits for the acknowledgements -->Calculates the throughput for the execution and displays it on the standard output.

References: http://www.cplusplus.com, Linux manual for attributes and command usage.