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Which of the following protocols could be used to secur…

A company’s legacy server requires administration using Telnet. Which of the following protocols could be used
to secure communication by offering encryption at a lower OSI layer? (Choose two.)

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A.
IPv6

B.
SFTP

C.
IPSec

D.
SSH

E.
IPv4

Explanation:
Telnet supports IPv6 connections.
IPv6 is the communications protocol that provides an identification and location system for computers on
networks and routes traffic across the Internet. IPsec is a protocol suite for securing Internet Protocol (IP)
communications by authenticating and encrypting each IP packet of a communication session. IPsec is a
compulsory component for IPv6.
IPsec operates at Layer 3 of the OSI model, whereas Telnet operates at Layer 7.

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