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Networking (TCP/IP, DNS, DHCP) · question
Q.02 of 52

Explain the difference between TCP and UDP protocols.

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Answer: TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are transport layer protocols with key differences:
TCP:

  • Connection-oriented (requires handshake)
  • Reliable delivery with error checking
  • Flow control and congestion control
  • Ordered packet delivery
  • Higher overhead
  • Used for: HTTP, HTTPS, FTP, SSH
    UDP:
  • Connectionless protocol
  • No guarantee of delivery
  • No flow control or error recovery
  • Faster with lower overhead
  • Used for: DNS queries, DHCP, streaming media, gaming
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