VPN est l’abréviation de « virtual private network » (réseau privé virtuel) et désigne un service qui protège votre connexion Internet et votre confidentialité en ligne. Il crée un tunnel chiffré pour vos données, protège votre identité en ligne en masquant votre adresse IP et vous permet d’utiliser les points d’accès Wi-Fi publics en toute sécurité.
Pourquoi avez-vous besoin d’un VPN ?
Personne n’aime être surveillé ou suivi, même s’il n’a rien à cacher. C’est pourquoi il est important de renforcer vos défenses en matière de confidentialité. Lorsque vous naviguez via un VPN, votre activité sur Internet est chiffrée de sorte que personne ne peut voir ce que vous faites en ligne. Voici d’autres raisons pour lesquelles vous avez besoin d’un VPN :
En général, lorsque vous essayez d’accéder à un site Web, votre FAI (fournisseur d’accès à Internet) reçoit la demande et vous redirige vers votre destination. Tandis que lorsque vous vous connectez à un VPN, il redirige d’abord votre activité Internet à travers un serveur VPN, avant de l’envoyer à votre destination. Voici ce qui se passe lorsque vous vous connectez à un VPN :
Le VPN change votre adresse IP et masque votre emplacement
Les personnes travaillant dans des pays où la liberté d’expression est limitée dépendent d’une connexion Internet privée pour leur travail. Leur vie peut même parfois en dépendre. Les personnes qui vivent sous un régime autoritaire devraient utiliser un VPN pour masquer leur adresse IP et garantir une sécurité supplémentaire pour leurs messages sensibles.
Fonctionnement d’un VPN
Il existe de nombreux types de VPN différents, mais nous allons nous concentrer ici sur le VPN grand public, celui que NordVPN offre. Lorsque vous téléchargez un logiciel VPN basé sur le client sur votre appareil, il effectue la majeure partie du travail à votre place : il vous suffit de vous identifier et de vous connecter.Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
Lorsque vous vous connectez à un service de réseau privé virtuel, celui-ci authentifie votre client auprès d’un serveur VPN.
Le serveur applique ensuite un protocole de chiffrement à toutes les données que vous envoyez et recevez.
Le service VPN crée un « tunnel » chiffré sur Internet. Cela sécurise les données qui circulent entre vous et votre destination.
Pour garantir la sécurité de chaque paquet de données, un VPN l’enveloppe dans un paquet externe, qui est ensuite chiffré par encapsulation. C’est l’élément central du tunnel VPN, qui assure la sécurité des données pendant leur transfert.
Lorsque les données parviennent au serveur, le paquet externe est supprimé via un processus de déchiffrement.
Comment fonctionne le tunneling VPN ?
Le tunnel VPN est créé en authentifiant d’abord votre client (un ordinateur, un smartphone ou une tablette) auprès d’un serveur VPN. Le serveur utilise ensuite l’un des nombreux protocoles de chiffrement pour s’assurer que personne ne puisse surveiller les informations qui circulent entre vous et votre destination en ligne.
N’oubliez pas qu’avant d’être envoyées et reçues sur Internet, les données doivent d’abord être divisées en paquets. Pour garantir que chaque paquet de données reste sécurisé, un service VPN l’enveloppe dans un paquet extérieur, qui est ensuite chiffré par un processus appelé encapsulation.
Ce paquet extérieur maintient la sécurité des données pendant le transfert, et il constitue l’élément central du tunnel VPN. Lorsque les données arrivent sur le serveur VPN, le paquet extérieur est retiré pour accéder aux données qu’il contient, ce qui nécessite un processus de déchiffrement.
Comment fonctionnent les serveurs VPN ?
Une fois le tunnel VPN établi, votre appareil envoie des informations chiffrées (comme le site Web que vous voulez visiter) au serveur VPN. Celui-ci les déchiffre et transmet les informations au serveur Web désigné. Il masque également votre véritable adresse IP avant d’envoyer les données. Au lieu de cela, vous utiliserez l’adresse IP du serveur VPN auquel vous êtes connecté(e).
Lorsque le serveur Web répond, le serveur VPN chiffre les données et vous les envoie par le biais de votre FAI. Votre client VPN déchiffre les données lorsqu’elles atteignent votre appareil.
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Gynecology and obstetrics belong to the same family, and the obstetrics department currently does not have a senior director, which is not very reassuring.As soon as they arrived at the door, Wu Buwei, who had completed the formalities, just came back.
Thank you, doctor, thank you doctor. It can be cured and the problem is not big.But this time, it was Li Jianwei calling. Du Heng said sorry, took the phone and walked out of the ward.
He instantly had the idea of giving up the idea and not wanting to do it.Du Heng s mood was a little complicated, but seeing that Wu Shengnan had no big problem, he didn t say anything more.
The team led by the two directors, It is the team with the highest treatment rate, the best praise rate, and the highest hospitalization rate.
Hearing what Xu Pinglin said, he quickly said, Director, let s go take a look.He said and marked the height on the cup for them. The family members were also attentive and hurriedly went out to borrow a pen from Wang Lili and drew a line on the cup.
Combined with the symptoms of the elderly, it is a deficiency of qi.And as time goes by, when the patient wakes up, the feeling of his tongue being pulled becomes even more uncomfortable.
Wang Shuqiu, who was making a clanging noise in the kitchen, immediately replied, I made lunch for you.Why, it wasn t that old horse who drank boy s urine It ll be fine.
Auntie, what s wrong with you Where do you feel uncomfortable Wu Buwei finished the pulse diagnosis and began to inquire.Good morning I just arrived and no one has arrived yet.
As long as you re not busy, please take a day off and come to my place.But it s not Wang Shuqiu and Zhao Xinfang, but the mother in law and father in law.
It was so greasy to eat. Last month he said that the food at the police station was good, but now he is not envious at all.Is it too late Du Heng was no longer reserved. Others are giving me face, but I am a bit too pretentious in being reserved.
Then he patted his white coat calmly, I said it before.I also feel uncomfortable after standing for a long time.
Du Heng pulled his little nephew out of the bed and started to dress him.The intrusion of heat and moisture is particularly likely to cause intestinal discomfort.
As long as there is a little delay, the police who have already gone upstairs can completely control Duda.But the only ones working were himself and Wu Buwei.
Although the beam is very close to the forehead, the weight of that large beam is not something that a person s head can bear.Wrapped too tightly. But now in the ward, the little babies, in addition to the cotton clothes on their bodies, also have their own quilt, a small blanket, and the health center s own quilt on the outside.
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This Xiaokang is my assistant, who is responsible for shooting and Editing.This ward should be designed to make full use of space, to place as many machines and equipment as possible, so that doctors and nurses have room to move around, and there are no large beds like those in ordinary wards.
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Cependant, il est utile de savoir comment fonctionne un VPN pour mieux comprendre le service. Voici ce qui se passe en coulisses :
