Telnet Explained

what is telnet so that is a topic of this video now telnet is a terminal emulation program that is used to access remote servers it's a simple command-line tool that runs on your computer and it'll allow you to send commands remotely to a server and administer that server just as if you were sitting in front of it so when you connect remotely to a server using telnet you would just use commands with a keyboard to tell that server what to do so you can use those commands to run programs create folders delete files create files transfer files browse directories start or stop services and so on so pretty much you can do everything even if you're a thousand miles away from that server and in addition to communicating with servers telnet is also used to manage and configure other network devices such as routers and switches and you can also use it to check if ports are open or closed on a server now telnet can be used with operating systems such as Windows and Mac OS but it's largely used on Linux and UNIX systems so as I stated before telnet is a command-line tool there is no graphical user interface it's just a very simple text oriented utility that will run on a computer in fact you don't even have to have a computer to run telnet you can just use a simple dumb terminal and all the commands are sent by using a keyboard and because it only sends commands and not graphics telnet is very fast now telnet stands for teletype network and it was developed back in 1969 and because it was developed prior to the internet security was not really an issue so with telnet all the commands are sent in clear text so there is no encryption so if you were to use telnet today to communicate with a server over the internet someone could easily eavesdrop and grab any sensitive data that you're sending to that server such as username and passwords so because of the lack of encryption telnet is outdated and it should not be used over the public Internet but some people still use it today but largely in a local area network and not over the internet but also they may have to use it if they are working with older equipment that can't support modern protocols such as SSH now SSH or secure shell is a better alternative to telnet secure shell protects the data from being attacked or stolen as it's being transferred over a network so as I stated before if you are sending sensitive data like a login or password a hacker could be listening and steal the data and that is the reason for secure shell secure shell encrypts the data during the transfer and protects it from potential threats and in addition to encryption it also provides password and public key authentication so secure shell does everything that telnet does but it's a secure protocol and that's what people use today instead of telnet now if you want to see some interesting examples of telnet you can do this on your computer and in my example we're going to do this on a Windows machine now first you have to enable the telnet client in the Windows operating systems so you first go into programs and features and then you would click on turn Windows Features on or off and from here you have to enable the town that client feature and then you would just open up a command prompt as an administrator and then you can start some telnet commands so for example if you want to see a Star Wars movie in a full ASCII version at a command prompt you just type town it space towel dot blinking lights dot NL and then you press ENTER and it'll show you an ASCII version of a Star Wars movie which is really interesting or you can also play a game of chess using town net so you would just type town net free chess org and then the port number which is 5,000 and then you can play a telnet version of chess or if you want to know the weather forecast for a specific city you can do that also so you can just type telnet rainmaker dot wonder ground comm and then press ENTER and then just enter a city code and it'll give you the weather for that city so thank you everyone for watching this video on telnet and ssh please subscribe follow me on twitter and thank you for watching

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