A systems administrator must remotely manage a Linux server that can be reached only over the public internet. Which of the following protocols will provide an encrypted channel that protects the administrator's credentials and all session data from eavesdropping?
Telnet
HTTP
SNMPv1
SSH
Secure Shell (SSH) establishes an encrypted session-typically over TCP port 22-that protects login credentials and all commands exchanged between the client and the server. Telnet, HTTP, and SNMPv1 transmit data in plaintext, making them vulnerable to interception and man-in-the-middle attacks. For that reason, SSH is the industry-standard choice for secure remote administration.
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