Originally published at: http://www.howtogeek.com/190014/htg-explains-what-is-the-difference-between-tcp-and-udp/
You’ve probably seen references to TCP and UDP when setting up port-forwarding on a router or when configuring firewall software. These two protocols are used for different types of data.
This was actually an interview question I had to answer for my recent advancement to Network & Security Administrator. Thankfully, I already knew enough of the answer to get it right (at least for interview purposes).
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