Telnet

Telnet (sometimes stylized TELNET) is a client-server application protocol that provides access to virtual terminals of remote systems on local area networks or the Internet. It is a protocol for bidirectional 8-bit communications. Its main goal was to connect terminal devices and terminal-oriented processes.

computer server

PuTTY () is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port. The name "PuTTY" has no official meaning.

text based online virtual world

cURL (pronounced like "curl", ) is a free and open source CLI app for uploading and downloading individual files. It can download a URL from a web server over HTTP, and supports a variety of other network protocols, URI schemes, multiple versions of HTTP, and proxying. The project consists of a library (libcurl) and command-line tool (curl), which have been widely ported to different computing platforms. It was created by Daniel Stenberg, who is still the lead developer of the project.

enables organizations to connect devices with an RS-232, RS-422 or RS-485 serial interface to a local area network

open-source, free, software implemented, terminal emulator program

simple Internet service that generates test traffic

Linux.Wifatch is an open-source piece of malware which has been noted for not having been used for malicious actions, instead attempting to secure devices from other malware.