MTCNA Exam Dumps | Which Layer 4 protocol is used for a Telnet connection?

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Question 73

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Question 73/90

Which Layer 4 protocol is used for a Telnet connection?

A. IP

B. TCP

C. TCP/IP

D. UDP

Correct Answer: B

Telnet is a protocol used to access remote devices via command-line over the network. It operates over TCP at Layer 4, using port 23.
MTCNA Course Material - Layer 4 Protocols:
"Telnet uses TCP port 23 for remote shell access. TCP ensures ordered and reliable delivery of commands and responses." Rene Meneses MTCNA Study Guide - TCP/IP Protocols:
"Telnet is an Application Layer protocol using TCP as its transport protocol." MikroTik Wiki - Telnet Access:
"Telnet communicates over TCP. It does not use UDP."
Other options:
* A. IP is a Layer 3 protocol
* C. TCP/IP is a model, not a single protocol
* D. Telnet does not use UDP

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