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      Question

      What is the difference between TCP and UDP

      protocols?
      A TCP operates at the Network layer with no guaranteed delivery of packets; UDP operates at the Transport layer with guaranteed delivery of packets Correct Answer Incorrect Answer
      B TCP is connectionless and fast; UDP is connection-oriented and reliable Correct Answer Incorrect Answer
      C TCP is connection-oriented and reliable with error checking; UDP is connectionless and faster with no guaranteed delivery Correct Answer Incorrect Answer
      D TCP is used only for file transfer; UDP is used only for email Correct Answer Incorrect Answer
      E TCP uses IP addresses; UDP uses MAC addresses Correct Answer Incorrect Answer

      Solution

      TCP (Transmission Control Protocol) establishes a connection via three-way handshake (SYN → SYN-ACK → ACK), guarantees delivery, orders packets, and performs error checking making it ideal for banking transactions, HTTP, FTP, email. UDP (User Datagram Protocol) sends packets without connection setup. It is faster, has lower overhead and is ideal for DNS, VoIP, video streaming, and online gaming where speed matters more than reliability.

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