Unlike SSH which provides a secure connection, Telnet does not, it simply provides a basic unsecured connection.Many lower level network devices support Telnet and not SSH as it required some additional processing.This article takes a look at these protocols, provides a basic description of their function and lists the port numbers that they are commonly associated with.
Your web browser attempts to create a connection on port 80 (the port used for HTTP traffic) for each element of the web page.
When your browser receives the data it requested from the HTTP server, such as an image, it closes the connection.
Caution should be used when connecting to a device using Telnet over a public network as the login credentials will be transmitted in the clear.
The DNS is used widely on the public internet and on private networks to translate domain names into IP addresses, typically for network routing.
FTP is one of the most commonly used file transfer protocols on the Internet and within private networks.
An FTP server can easily be set up with little networking knowledge and provides the ability to easily relocate files from one system to another.
Last but not least, get in touch with us by sharing other methods for listing open ports in Linux or asking a question via the response form below. S enthusiast, an upcoming Linux Sys Admin, web developer, and currently a content creator for Tec Mint who loves working with computers and strongly believes in sharing knowledge.
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One of the many fundamental things to know as a network engineer is the function and port number used by a number of common services as well as many that are typically implemented during the course of a network engineer’s career.