Which transport protocols can port 88 be used by for Kerberos authentication?

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Study for the CPSA Port Numbers Exam. Practice with flashcards and multiple choice questions, each with hints and explanations. Get ready for your test!

Multiple Choice

Which transport protocols can port 88 be used by for Kerberos authentication?

Explanation:
Port 88 is Kerberos’ service port and can use both UDP and TCP for authentication traffic. UDP is efficient for small, quick exchanges, while TCP provides reliability and can handle larger messages when needed. Since Kerberos messages can be transported over either protocol, both UDP and TCP are valid options on that port. Some environments start with UDP for speed, then fall back to TCP if the message is too large or reliability is required. That’s why the best answer includes both protocols.

Port 88 is Kerberos’ service port and can use both UDP and TCP for authentication traffic. UDP is efficient for small, quick exchanges, while TCP provides reliability and can handle larger messages when needed. Since Kerberos messages can be transported over either protocol, both UDP and TCP are valid options on that port. Some environments start with UDP for speed, then fall back to TCP if the message is too large or reliability is required. That’s why the best answer includes both protocols.

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