UDP vs TCP

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Last updated 1:03 PM on 5/31/26
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8 Terms

1
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What is TCP?

Transmission Control Protocol

  • Connection oriented transport-layer protocol

  • Ensures reliable, ordered, and error checked delivery of data between devices

2
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What does a 3-way handshake mean in the context of TCP?

  • 3-way handshake = Are you there > yes, I’m here > great, let’s talk

3
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What are key characteristics of TCP?

  • Connection oriented

  • Error-checking

  • Data arrives in order

  • Slower but reliable

4
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What is UDP?

User Datagram Protocol

  • Connectionless transport-layer protocol that sends data without guaranteeing delivery order, order, or error checking

5
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What are the key characteristics of UDP?

  • Connectionless

  • No delivery guarantee

  • No retransmission

  • Data can arrive out of order or be lost

  • Faster and lightweight

6
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What is TCP used in?

  • Web browsing

  • Email

  • File transfer

  • Remote access

7
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What is UDP used for?

  • DNS

  • DHCP

  • VoIP

  • Streaming and online gaming

8
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Which protocol is good for gaming and why?

UDP

  • Speed and timing matter more than accuracy

  • Low latency