Which protocol allows for secure access to a remote device?

Which protocol allows for secure access to a remote device?

• A. FTP
• B. Telnet
• C. SSH
• D. SNMP

Answer: (C)

SSH, or Secure Shell, is the protocol that enables secure access to a remote device. It provides a secure channel over an unsecured network by using encryption to protect the data being transmitted. This means that the communication between the client and the server is secure against eavesdropping and man-in-the-middle attacks. In addition to securing the connection, SSH also offers various authentication mechanisms, such as password-based and public key authentication, enhancing the security of user credentials. As a result, SSH is widely used for managing network devices and services securely, including remote login and command execution. The other protocols listed do not offer the same level of security for remote access. For example, FTP (File Transfer Protocol) transmits data in plain text, making it vulnerable to interception. Telnet, similar to FTP, also transmits data unencrypted, including sensitive information such as usernames and passwords. SNMP (Simple Network Management Protocol) is primarily used for network management and monitoring rather than for secure remote access, especially when not using SNMPv3 which includes some security features, but still not as focused on remote access as SSH. Therefore, SSH is the preferred choice for secure access to a remote device.

SSH, or Secure Shell, is the protocol that enables secure access to a remote device. It provides a secure channel over an unsecured network by using encryption to protect the data being transmitted. This means that the communication between the client and the server is secure against eavesdropping and man-in-the-middle attacks.

In addition to securing the connection, SSH also offers various authentication mechanisms, such as password-based and public key authentication, enhancing the security of user credentials. As a result, SSH is widely used for managing network devices and services securely, including remote login and command execution.

The other protocols listed do not offer the same level of security for remote access. For example, FTP (File Transfer Protocol) transmits data in plain text, making it vulnerable to interception. Telnet, similar to FTP, also transmits data unencrypted, including sensitive information such as usernames and passwords. SNMP (Simple Network Management Protocol) is primarily used for network management and monitoring rather than for secure remote access, especially when not using SNMPv3 which includes some security features, but still not as focused on remote access as SSH. Therefore, SSH is the preferred choice for secure access to a remote device.