Answer :
User Datagram Protocol (UDP) and the TCP are the basic transport-level protocols for making connections between Internet hosts.
What are the characteristics of TCP?
TCP is reliable protocol.
TCP ensures that the data reaches intended destination in the same order it was sent.
TCP is connection oriented.
TCP provides error-checking and recovery mechanism.
TCP provides end-to-end communication.
TCP provides flow control and quality of service.
What are the main characteristics of UDP?
Provides connectionless, unreliable service.
So UDP faster than TCP.
Adds only checksum and process-to-process addressing to IP.
Used for DNS and NFS.
Used when socket is opened in datagram mode.
It sends bulk quantity of packets.
No acknowledgment.
Good for video streaming it is an unreliable protocol.
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