Networking Concepts第 21 / 100 题
Which protocol uses TCP port 22 to provide encrypted remote command-line access?
a.Telnet
b.FTP
c.RDP
d.SSH
解析
SSH uses TCP port 22 to provide an encrypted remote shell, replacing insecure protocols like Telnet. Telnet on port 23 sends data in clear text. SSH is the standard for secure device management.
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