CMIT 369 Week 6-1 TCP and UDP

Describe TCP and UDP, and how they differ. Why do both protocols exist?

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The easiest way for me to differentiate between TCP and UDP is to remember that TCP is connection oriented and UPD is connectionless. TCP is used by applications where reliability is crucial, but speed is not. TCP has high reliability because it uses the three-way handshake to maintain the connection while communication is taking place. It also rearranges the packets into a specific order and if a packet is received out of order or not a ll, it will request that missing packet to be retransmitted. TCP is used with HTTP, HTTPS, FTP, and SMTP because when accessing a webpage, you connect to the web page, request information and the web server responds to the request. This is an example of that connection oriented handshake that characterizes TCP.UDP is used when speed may be more important that whether or not the message was received. UDP is faster, but is less reliable

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