Marka dadka intooda badan ay ka fikiraan internetka, waxa ay runtii ka fekerayaan waa shabakadda^(Web) . Si kastaba ha ahaatee shabakada muuqalka ah ee ka kooban intarneedku waxa ay xambaarsan tahay in ka badan oo kaliya mareegaha iyo adeegyada dadweynaha soo food saara ee aynu dhammaan isticmaalno maalin kasta. 

Dhab ahaantii, inta badan^{(most )} intarneedku kuma xidhna shabkada gabi ahaanba, balse waxa la laayay gebi ahaanba adeegyada kale ee intarneedka ee isticmaala “ protocols ” kala duwan. HTTP ama borotokoolka wareejinta hypertext^{(hypertext transfer protocol )} waxaa loo isticmaalaa in loogu adeego shabakadaha browserkaaga, tusaale ahaan. Telnet sidoo kale waa borotokool internet, laakiin leh taariikh kale iyo adeegsi xiiso leh. 

Laakiin waa maxay telnet? Maqaalkan waxaad ku baran doontaa taas.

Waa maxay Telnet?

Tim Starling (WMF) / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0)

Telnet waa hab-maamuuska shebekad qoraal-ku-saleysan kaasoo u ogolaanaya macmiilka (waa adiga) inuu la xiriiro kumbiyuutarka fog, meel ka baxsan internetka. Caadiyan, isku xirka Telnet wuxuu dul maraa ^(Telnet)Dekedda^(Port) 23 iyo, sida mareegaha, adeegyada Telnet waxay leeyihiin ciwaan gaar ah.

Waagii hore, waxa laga yaabaa inaad adeegsatay terminal go'an si aad u gasho adeega Telnet . Terminalku run ahaantii ma aha kombiyuutaro buuxa, laakiin waa qalab siinaya "weji" fog oo kombuyuutar fog ah. 

Maalmahan, wax kasta oo laga bilaabo smartwatch ilaa TV smart^{(smart TV)} ayaa leh awood xisaabeed buuxa, sidaa darteed terminaalka carrabka ah run ahaantii aad uma faa'iidaysto. Si aad maanta u isticmaasho adeegga Telnet , waxaad u baahan doontaa arji loo yaqaan emulator terminal^{(terminal emulator)} . Warka wanaagsani waa in ay jiraan tiro dhan oo ah emulators terminal bilaash ah oo bilaash ah^{(great free terminal emulators)} oo loogu talagalay nidaam kasta oo qalliin ah.

Waxaa laga yaabaa inaad u maleyneyso in Telnet uusan u muuqan wax ku habboon hadda. In kasta oo uu yahay adeeg internet oo dahsoon, waxaa jira bulsho weyn oo Telnet ah oo adduunka oo dhan ah.

Waxa kale oo ay wali ku leedahay door aad muhiim u ah maaraynta kombuyuutarka fog ee bandwidth-yar. Taas oo la macno ah in aanay Telnet ka fogayn dhimashadeeda, balse ay wali leedahay mustaqbal ifaya. Inta aynaan u gudbin, si kastaba ha ahaatee, aan si degdeg ah u eegno halka ay Telnet ka timid.

Taariikhda Telnet oo Kooban

Erik Pitti / CC BY (https://creativecommons.org/licenses/by/2.0)

Intarneedka maanta ka hor, waxaa jiray ARPANET . Isku xirka kombuyuutarrada militariga iyo tacliinta waqti dadka kaliya ee kombuyuutarku ay u shaqeynayeen hay'adaha ama hay'adaha dawladda. Kombuyuutarrada la hadal hayaa waxay ahaayeen mashiinno waaweyn oo buuxiyey dhammaan qolalka. Tani waxay ahayd ka hor intaanay fikradda kombuyuutar shakhsi ahaaneed ku jirin qof kasta maskaxdiisa.

Helitaanka kombuyuutarrada inay ku wada hadlaan shabakadan cusub hawl fudud ma ahayn. Inta badan sababtoo ah mishiinadani mid walbaa wuxuu lahaa nashqadaha iyo naqshadaha midba midka kale.

Waxa loo baahnaa waa af keliya oo la wadaago. 1971 kii, soo jeedintii ugu horaysay ee borotokoolka Telnet waa la diyaariyay. Si kastaba ha ahaatee, waxay qaadan doontaa in ka badan toban sano in Telnet lafteeda lagu sii daayo tignoolajiyada shaqaynaysa. Sannadkii 1983-kii, hab-raacii ugu horreeyay ee borotokoolka telnet ayaa loo sii daayay adduunka.

Telnet Sida Aaladda Maareynta Fog

Telnet waxaa loo isticmaali karaa in lagu diro amarada nidaamyada fog fog, sidaas darteedna lagu xakameeyo iyada oo loo marayo interface terminal. Tan marar dhif ah ayaa la sameeyaa maalmahan, iyadoo nidaamka SSH ( Secure Shell ) uu badiyaa beddelayo ujeeddada iyo shaqada Telnet . 

Si kastaba ha ahaatee, Telnet wali waa muhiim, sababtoo ah nidaamyada ku shaqeeya nidaamka hawlgalka wakhtiyadii hore, laakiin weli la isticmaalo maanta, waxaa laga yaabaa in la heli karo oo keliya Telnet . Qalabka internet-ka qaarkood, sida router-yada qaarkood, waxa laga yaabaa inay sidoo kale ka jawaabaan oo keliya amarrada  Telnet .

Taasi dhab ahaantii waa mid ka mid ah faa'iidooyinka muhiimka ah ee Telnet . Waa hab-maamuus duug ah oo asaasi ah oo inta badan lagu hallayn karo inuu u shaqeeyo si la isku halleyn karo oo joogto ah. Ka dib oo dhan, ujeeddadu waxay ahayd inay noqoto luqad caalami ah oo kombuyuutarku si ay u soo diraan oo ay helaan amarrada. Si kastaba ha ahaatee, waa inaan loo isticmaalin tignoolajiyada safka hore haddii ay suurtogal tahay. Secure Shell guud ahaan waa doorashada ugu fiican ku dhawaad ​​xaalad kasta,

Waa maxay Telnet vs Secure Shell

Telnet waxaa la sameeyay waqti fikradda amniga internetka aysan runtii qofna maskaxdiisa ku jirin. Maadaama oo kaliya jilayaasha la aamini karo ay haysteen kombiyuutaro leh marin shabakadeed, fikradda ah in qof uu jabsado kombuyuutarka ayaa ahayd mid aad u fog. 

Maanta balaayiin dad ah ayaa haysta kombuyuutar iyo sidoo kale xiriir internet. Hackers waxay si joogto ah u weeraraan nidaamyada fog fog, taas oo macnaheedu yahay inay had iyo jeer raadinayaan nuglaanshaha cusub. Mar haddii Telnet ay amarkeeda ku soo dirto qoraal cad oo qof kastaa garanayo dekedda shabakadeed ee ay si caadi ah u isticmaasho, waa wax fudud in la farageliyo ama la beddelo xogta.

Secure Shell waxay xallisaa arrintan iyadoo adeegsanaysa sir adag dhammaan xogta ay dirto oo ay hesho. Tani waa mid ka mid ah sababaha ugu waaweyn ee ay u bedeshay Telnet^(Telnet) . Taas oo la yiraahdo, maalmahan waxaa sidoo kale jira habab loo isticmaalo sirta Telnet , inkastoo aysan ahayn qayb isku dhafan oo ka mid ah borotokoolka.

Sida Loo Helo Adeegga Telnetka

Si aad ugu xidho adeega Telnet , waxa kaliya ee aad u baahantahay waa emulator terminal iyo ciwaanka kombayutarka aad rabto in aad ku xidho.

Waxaa jira emulators badan oo terminal ah. Badankoodu waa bilaash. Xaaladdan oo kale waxaan isticmaaleynaa ereyga caanka ah ee Tera Term . Mudaaharaad ahaan, waxaanu ku xidhi doonaa adeega Telnet ee adeegsada qoraalka ASCII si uu dib ugu sheego dhamaan filimkii ugu horeeyay ee Star ^(ASCII)Wars .

Caadi ahaan, codsiga terminalka dhaqameed waxaad ku qori kartaa "telnet" oo ay ku xigto meel bannaan iyo ciwaanka adeegga. Waxa kale oo laga yaabaa inaad ku qeexdo dekedda amarka, taas oo inta badan ah dekedda 23 ee Telnet . Si kastaba ha noqotee, Tera Term wuxuu leeyahay interface garaaf ah, markaa waxa kaliya ee aan sameyno waa buuxinta shaashadda sidaas oo kale.

Sida aad sheegi karto, ciwaanka adeegani waa towel.blinkenlights.nl. Iyadoo wax walba loo habeeyey sida kor ku xusan, kaliya dhagsii OK oo tani way dhacdaa.

Cajiib! Sax? Yaynaan ku joojin madadaalo. Waa kuwan qaar kale oo adeegyo Telnet ah oo aad la ciyaari karto inta aad ka maqan tahay app-ka terminalka.

Cool Telnet Services

Hadda oo aan soo koobnay xaqiiqooyinka muhiimka ah ee ku saabsan Telnet , ma jirto hab ka wanaagsan oo lagu dhammeeyo koorsadan shilka ah oo aan ahayn in lagu tilmaamo jihada meelaha xiisaha leh ee aad hadda booqan karto. 

Telnet.org waxa^(Telnet.org) ay haysaa liis aad u weyn oo ah meelaha Telnet la booqdo. Waa inaad u gudubtaa halkaas si aad u hesho meelo badan oo dahsoon, laakiin waa kuwan waxyaabaha ugu muhiimsan ee dadka intooda badan ay heli doonaan laad:

•  Ches-ka bilaashka ah^{(Free Chess)}
• Check the weather!
• ANSI Nyancat meme

Halkan kaligaa ayaad tahay. Laakiin haddii aad leedahay dulqaad, dunida Telnet waxay noqon kartaa mid aad u faa'iido leh inaad sahamiso oo aad tijaabiso. Waxaad ku riyoon doontaa ASCII waqti yar gudahood!

HDG Explains: What Is Telnet?

When most people think of thе internet, what they’re really thinking of is the Web. However the physical network that makes up the internet carriеs far more than just websites and the public-facing services we all υse еvery day. 

In fact, most of the internet isn’t related to the web at all, but rather a whole slew of other internet services that use various “protocols”. HTTP or hypertext transfer protocol is used to serve websites to your browser, as one example. Telnet is also an internet protocol, but one with a different history and some interesting uses. 

But what is telnet? In this article you’ll learn just that.

What Is Telnet?

Tim Starling (WMF) / CC BY-SA (https://creativecommons.org/licenses/by-sa/4.0)

Telnet is a text-based network protocol that lets a client (that’s you) communicate with a remote computer, somewhere out there on the internet. Usually, Telnet connections run over Port 23 and, just like websites, Telnet services have a specific address.

In the past, you may have used a dedicated terminal to access a Telnet service. Terminals aren’t really full computers, but simply devices that provide a remote “face” for a distant computer. 

These days, just about everything from a smartwatch to a smart TV has full computing power, so dumb terminals don’t really get much use anymore. In order to use a Telnet service today, you’ll need an application known as a terminal emulator. The good news is that there are a whole bunch of great free terminal emulators out there for every operating system.

You might be thinking that Telnet doesn’t sound all that relevant anymore. While it is a more obscure internet service, there’s a sizable and dedicated Telnet community worldwide.

It also still has a very important role in low-bandwidth remote computer management. Which means that not only is Telnet far from dead, it still has a bright future ahead of it. Before we get to that, however, let’s take a quick look at where Telnet came from.

A Brief History Of Telnet

Erik Pitti / CC BY (https://creativecommons.org/licenses/by/2.0)

Before the internet of today, there was ARPANET. A military and academic computer network at a time when the only people who had computers worked for government agencies or institutions. The computers in question were massive machines that filled entire rooms. This was before the idea of a personal computer was on anyone’s mind.

Getting computers to talk to each other over this new network was no easy task. Mainly because these machines each had very different designs and architectures from one another.

What was needed is a single shared language. In 1971, the first proposal for the Telnet protocol was drafted. However, It would take more than a decade for Telnet itself to be released as a working technology. In 1983, the very first iteration of telnet protocol was released to the world.

Telnet As A Remote Management Tool

Telnet can be used to send commands to remote systems and therefore control them through the terminal interface. This is rarely done these days, with the SSH (Secure Shell) protocol mostly replacing the purpose and function of Telnet. 

However, Telnet is still important, because systems that run operating systems from previous eras, but are still in use today, might only be accessible through Telnet. Some internet appliances, such as certain routers, might also only respond to Telnet commands. 

That’s actually one of the key advantages of Telnet. It’s such an old and fundamental protocol that it can often be relied upon to work reliably and consistently. After all, it’s purpose was to be a universal language for computers to send and receive commands. However, it should not be used as a first-line technology if at all possible. Secure Shell is generally the best choice in almost every situation,

What Is Telnet vs Secure Shell

Telnet was developed at a time when the idea of cyber security wasn’t really on anyone’s mind. Since only trusted actors had computers with network access, the idea that someone would hack into a computer was pretty far-fetched. 

Today billions of people have a computer as well as an internet connection. Hackers are constantly attacking remote systems, which means that they are always looking for a new vulnerability. Since Telnet sends its commands in plain text and everyone knows which network port it uses by default, it’s fairly trivial to intercept or modify the data.

Secure Shell solves this issue by using strong encryption on all the data it sends and receives. This is one of the main reasons it has supplanted Telnet. That being said, these days there are also ways of applying encryption to Telnet, though it’s not an integrated part of the protocol

How To Access A Telnet Service

To connect to a Telnet service, all you need is a terminal emulator and the address of the computer you want to connect to.

There are plenty of terminal emulators. Most of them are free. In this case we’re going to use the popular Tera Term. As a demonstration, we’ll connect to a Telnet service that uses ASCII text to retell the entire first Star Wars film.

Usually, with a traditional terminal application you’d type “telnet” followed by a space and the address of the service. You may also have to specify the port in the command, which is usually port 23 for Telnet. However, Tera Term has a graphical interface, so all we have to do is fill in the screen like so.

As you can tell, the address for this service is towel.blinkenlights.nl. With everything configured as above, just click OK and this happens.

Awesome! Right? Let’s not stop the fun there. Here are some more Telnet services you can play around with while you have that terminal app out.

Cool Telnet Services

Now that we’ve covered the essential facts about Telnet, there’s no better way to round off this crash course than to point you in the direction of some interesting places you can visit right now. 

Telnet.org maintains a huge list of Telnet places to visit. You should head over there to get the more obscure destinations, but here are the highlights most people will get a kick out of:

•  Free Chess
• Check the weather!
• ANSI Nyancat meme

From here you’re on your own. But if you’ve the patience, the world of Telnet can be pretty rewarding to explore and experiment with. You’ll be dreaming in ASCII in no time!

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