In UDP, a port is a number that specifies the application which is using the UDP service. It can be assumed as an address of the applications. There are various applications that use UDP as their transport protocol, like Routing information protocol, Simple network management protocol, Dynamic host configuration protocol etc.

Traffic of voice and video over the network is generally transmitted by using UDP protocol. Comparison between some of protocols: TCP is a connection-oriented protocol that creates end to end communications. When there is a connection between the sender and receiver, the data may be sent over the connection.

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