Which of the following is NOT a proper application of the UDP protocol?

• A. Streaming video
• B. Broadcast messaging
• C. Managing a server over SSH
• D. Online gaming

Answer: (C)

The use of the UDP (User Datagram Protocol) is particularly suited for applications where timely delivery is more critical than error-free delivery. This is because UDP is a connectionless protocol that does not establish a reliable connection before data transmission and does not guarantee that packets will arrive in order or even at all.

Managing a server over SSH (Secure Shell) is not a proper application of the UDP protocol as SSH requires a reliable and secure connection to ensure that commands and data are transmitted without loss or corruption. SSH relies on TCP (Transmission Control Protocol), which provides error-checking, guarantees delivery of packets, and maintains the order of the messages, making it ideal for remote server management where security and reliability are paramount.

In contrast, applications like streaming video, broadcast messaging, and online gaming can tolerate some level of data loss. For instance, streaming video can remain functional even if some frames are dropped, broadcast messaging can be sent to multiple recipients quickly without needing acknowledgment of receipt, and online gaming often requires low latency, where the speed of packet delivery is prioritized over accuracy.