Explain about threads in computer networks?

A thread is the sequence of instructions followed by a CPU, and is an independently dispachable unit in the run queue. A process can start and manage multiple threads, each managing an aspect of the overall processing. The operating system can schedule the threads independently, allowing them CPU time if they are ready, or blocking them if they are waiting on something, such as an IO completion. In a network process, such as a web server, there can be many things going on at the same concurrent time. Threads are an ideal solution to the problem of managing all of these things, because the main process does not need to poll each sub-process (thread) to see if it needs or is ready to do work.