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What is the difference between TCP and UDP ?
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Answer Posted / surendran
1. TCP(Transmission Control Protocol). TCP is a
connection-oriented protocol, a connection can be made from
client to server, and from then on any data can be sent
along that connection.
o Reliable - when you send a message along a TCP
socket, you know it will get there unless the connection
fails completely. If it gets lost along the way, the server
will re-request the lost part. This means complete
integrity, things don't get corrupted.
o Ordered - if you send two messages along a
connection, one after the other, you know the first message
will get there first. You don't have to worry about data
arriving in the wrong order.
o Heavyweight - when the low level parts of the
TCP "stream" arrive in the wrong order, resend requests
have to be sent, and all the out of sequence parts have to
be put back together, so requires a bit of work to piece
together.
2. UDP(User Datagram Protocol). A simpler message-
based connectionless protocol. With UDP you send messages
(packets) across the network in chunks.
o Unreliable - When you send a message, you don't
know if it'll get there, it could get lost on the way.
o Not ordered - If you send two messages out, you
don't know what order they'll arrive in.
o Lightweight - No ordering of messages, no tracking
connections, etc. It's just fire and forget! This means
it's a lot quicker, and the network card / OS have to do
very little work to translate the data back from the
packets.
| Is This Answer Correct ? | 78 Yes | 12 No |
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