SSH, or Secure Shell, is commonly used for secure remote access to network devices. It allows users to log into another computer or device securely over a network. SSH provides a secure channel by encrypting the data transmitted between the client and the server, which is crucial for maintaining the confidentiality and integrity of information, especially when it involves sensitive operations like device management or configuration.
In contrast, SNMP (Simple Network Management Protocol) is primarily used for network management tasks, such as monitoring the health and performance of network devices, rather than providing direct access for remote control. ICMP (Internet Control Message Protocol) is used for network diagnostics, such as sending ping requests, and does not facilitate remote access. SIP (Session Initiation Protocol) is involved in initiating, maintaining, and terminating real-time sessions involving audio, video, and messaging, making it unrelated to remote access for network devices. Thus, SSH stands out as the correct protocol for secure remote access.