Telnet Vs SSH ?
Telnet Vs SSH ?
Telnet is a client-server protocol used to establish a bidirectional, interactive, text-oriented communication session with a remote device over a network. It operates using the Transmission Control Protocol (TCP) on port 23 and enables a user, typically a network administrator, to remotely access and manage devices such as routers and servers through a command-line interface.
To initiate a Telnet session, a user runs a Telnet client application and connects to the IP address or hostname of the target remote device. The remote device must have a Telnet server configured and running to accept and handle the connection request.
SSH is a protocol designed for remote access and management of devices. It employs encryption to ensure that all data transmitted across the network remains protected from unauthorized interception.
Similar to Telnet, users need to have an SSH client installed to access a remote device, while the remote device must have an SSH server running. By default, SSH operates on TCP port 22.
Unlike Telnet, which lacks security features, SSH provides robust security mechanisms that safeguard users from malicious threats. Due to the inherent vulnerabilities of Telnet, SSH has become the preferred choice for securing network communications.
Similarities
- Both use a client-server architecture. A user runs a client application to connect to a server on the remote device.
- Both are application-layer (Layer 7) protocols used for remote interaction with network devices.
- Both Telnet and SSH use the Transmission Control Protocol (TCP) to establish a connection.
- Both support a bidirectional, interactive text-based communication session between the local user and the remote device.
- Allows users to execute commands on a remote machine as if they were physically present.
- Both are commonly used by network administrators to manage and configure network devices, such as routers and servers.
Differences
