İntranet ve Sanal Özel Ağ (VPN)

WEBVTT 00:00:01.829 --> 00:00:05.852 Was ist ein Intranet und ein Virtual Private Network VPN? 00:00:06.473 --> 00:00:10.396 Ein Intranet ist ein geschlossenes Netzwerk. 00:00:11.857 --> 00:00:18.322 Ein Beispiel dafür wäre ein Computernetzwerk, das nur von den Mitarbeitern eines Unternehmens genutzt wird. 00:00:19.142 --> 00:00:28.810 In einem solchen Netzwerk wird das TCP-IP-Protokoll verwendet, über das wir in den folgenden Abschnitten unseres Moduls mehr erfahren werden. 00:00:29.670 --> 00:00:36.893 Aufgrund dieser technischen Ähnlichkeit ähnelt die Verwaltung des Internets stark dem Internet. 00:00:00.093 --> 00:00:41.694 Wenn Sie sich das Internet als Welt vorstellen, können Sie das Internet als Land betrachten. 00:00:43.895 --> 00:00:46.056 Wofür wird ein Intranet verwendet und wo wird es eingesetzt? 00:00:49.059 --> 00:01:03.412 Wir haben gesagt, dass das Internet in Unternehmen, insbesondere in Regierungsbehörden oder Bildungseinrichtungen, ein Netzwerk ist, das von einem Unternehmen erstellt wurde. 00:01:03.432 --> 00:01:04.833 genannt. 00:01:06.034 --> 00:01:16.163 Beim Zugriff auf dieses Intranet müssen bestimmte Sicherheitsmaßnahmen getroffen werden, wobei das Virtual Private Network oder VPN an erster Stelle steht. 00:01:18.407 --> 00:01:20.048 Was ist VPN, meine Freunde? 00:01:20.108 --> 00:01:23.171 VPN steht für Virtual Private Network. 00:01:23.391 --> 00:01:25.873 Das türkische Äquivalent ist ein virtuelles privates Netzwerk. 00:01:26.934 --> 00:01:30.397 VPN überträgt private Daten über ein öffentliches Netzwerk. 00:01:31.678 --> 00:01:37.083 Ein Virtual Private Network oder VPN ist ein Netzwerk, das nur von autorisierten Personen gelesen und genutzt werden kann. 00:01:38.510 --> 00:01:45.597 Für dies ist ein Benutzername und ein Passwort erforderlich oder es muss erneut ein Benutzername und ein Passwort für bestimmte Dienste bezahlt werden. 00:01:45.757 --> 00:01:57.209 Wenn Sie in einem Unternehmen, einer Bildungseinrichtung oder einem ähnlichen Ort über das Internet und VPN zugreifen müssen, wird Ihnen dieser Service kostenlos zur Verfügung gestellt. 00:01:59.936 --> 00:02:07.306 Die grundlegende Information über ein VPN, also ein virtuelles privates Netzwerk, ist, dass die Verbindung zwischen privaten und öffentlichen Netzwerken über einen digitalen Tunnel hergestellt wird. 00:02:07.746 --> 00:02:11.591 Am einen Ende des Tunnels befindet sich der VPN-Client, am anderen Ende der VPN-Server. 00:02:11.651 --> 00:02:17.739 Sie können sich also vorstellen, dass es wie ein Tunnel zwischen dem Intranet-Tor und dem Tor von Ihrem Computer ist. 00:02:20.115 --> 00:02:24.159 Ein VPN überträgt also virtuelle private Daten verschlüsselt von zwei Endpunkten. 00:02:24.258 --> 00:02:27.662 Dies geschieht über das Verschlüsselungsverfahren. 00:02:27.702 --> 00:02:30.304 Es gibt verschiedene Details zu diesem Verschlüsselungsverfahren. 00:02:30.365 --> 00:02:33.668 Diese werden wir in den kommenden Abschnitten genauer behandeln. 00:02:36.452 --> 00:02:43.394 Eine weitere wichtige Information, die wir nicht vergessen sollten, ist, dass die Verbindung zwischen dem VPN und den Islamisten vom Internetdienstanbieter bereitgestellt wird. 00:02:43.413 --> 00:02:54.877 Ohne Türk Telekom, Superonline oder Türksel wäre die Verbindung zwischen VPN und Computer oder zwischen Internet und Computer nicht möglich. 00:02:55.017 --> 00:02:55.517 möglich. 00:02:59.873 --> 00:03:03.397 Lassen Sie uns nun etwas mehr über die Funktionsweise eines VPNs erfahren, meine Freunde. 00:03:15.063 --> 00:03:16.924 Weil unsere Daten verschlüsselt sind. 00:03:17.663 --> 00:03:23.445 Ein Virtual Private Network, VPN, ist ein System, das es insbesondere Mitarbeitern ermöglicht, von unterwegs oder von zu Hause aus auf das Firmennetzwerk zuzugreifen. 00:03:23.525 --> 00:03:31.928 Aufgrund des Bedarfs an Homeoffice und Remote-Zugriff auf Systeme werden virtuelle private Netzwerke heutzutage sehr häufig verwendet. 00:03:33.568 --> 00:03:37.829 Es ist tatsächlich sinnvoll, VPN aus Sicherheitsgründen bei jeder Internetverbindung zu verwenden. 00:03:37.929 --> 00:03:43.271 Zum Beispiel nutze ich persönlich immer VPN für Bankgeschäfte und ähnliche Transaktionen. 00:03:44.434 --> 00:03:49.137 Wir werden Ihnen viele kostenpflichtige und kostenlose VPN-Dienste für den persönlichen Gebrauch zur Verfügung stellen. 00:03:49.677 --> 00:03:59.603 Es ist ratsam, ernsthafte Recherchen zur Qualität kostenloser VPN-Dienste durchzuführen, die Sie außerhalb des von Ihrem Unternehmen, Bildungseinrichtung oder staatlichen Organisation bereitgestellten VPN nutzen möchten. 00:03:59.623 --> 00:03:59.923 Sie müssen recherchieren. 00:04:00.803 --> 00:04:08.688 Es ist wichtig zu betonen, dass es heutzutage nicht viele erfolgreiche kostenlose VPN-Software oder -Dienste gibt. 00:04:11.573 --> 00:04:14.175 Wir haben gefragt, was die Beziehung zwischen VPN und dem Internet ist. 00:04:14.215 --> 00:04:16.958 Lassen Sie uns nun Beispiele aus dem wirklichen Leben geben. 00:04:16.998 --> 00:04:19.540 Angenommen, Sie sind Vertriebsmitarbeiter. 00:04:20.480 --> 00:04:26.866 Nach einem Kundentermin steigen Sie direkt ins Auto und möchten auf das Firmensystem zugreifen. 00:04:27.286 --> 00:04:30.969 Sie haben mobile Daten über Ihr Mobiltelefon aktiviert. 00:04:31.069 --> 00:04:33.712 Das wird im Englischen als persönlicher Hotspot bezeichnet. 00:04:34.492 --> 00:04:39.053 Sie haben es aktiviert und sich sofort über ein VPN mit dem Firmeninternet verbunden und Daten gesendet. 00:04:39.154 --> 00:04:44.176 Sie arbeiten von zu Hause aus und sind Datenanalyst. 00:04:44.236 --> 00:04:50.379 Um Datenanalyst zu sein, müssen Sie Daten kontinuierlich aus dem Firmennetzwerk und der Datenbank abrufen. 00:04:50.859 --> 00:04:52.220 Wir verwenden wieder VPN. 00:04:53.871 --> 00:05:05.458 Darüber hinaus schützen wir alle Bankgeschäfte und ähnliche persönliche Informationen, die hochriskante persönliche Daten sein könnten, über VPN. 00:05:09.982 --> 00:05:14.065 Nun geht es um die Bedeutung und Messung der Übertragungsgeschwindigkeit, meine Freunde. 00:05:14.526 --> 00:05:23.634 Was bedeuten die Begriffe Bit pro Sekunde, Kilobit pro Sekunde, Megabit pro Sekunde, Gigabit pro Sekunde? 00:05:24.755 --> 00:05:27.577 Wir haben bereits erklärt, was ein Bit ist. 00:05:28.038 --> 00:05:29.999 Lassen Sie uns unser Wissen nun vertiefen. 00:05:31.620 --> 00:05:37.763 Wir haben das Bit im Zusammenhang mit dem Computerspeicher verwendet, jetzt werden wir es im Zusammenhang mit der Geschwindigkeit, der Internetgeschwindigkeit verwenden. 00:05:37.843 --> 00:05:43.765 Die Übertragungsgeschwindigkeit in A wird durch die Anzahl der übertragenen Bits pro Sekunde bestimmt. 00:05:43.805 --> 00:05:47.687 So gelangen wir relativ zu den Begriffen schnell oder langsam zu dieser Definition. 00:05:47.807 --> 00:05:51.309 Ein Standardmodem überträgt über eine analoge Telefonleitung mit 56.000 Bits pro Sekunde. 00:05:53.527 --> 00:05:59.889 Auf Türkisch wird dies als 56 kbps geschrieben. 00:06:01.189 --> 00:06:03.110 Die englische Bezeichnung dafür ist Kilobyte pro Sekunde. 00:06:03.150 --> 00:06:06.951 Ein Standardmodem wird technisch als 56k Modem bezeichnet. 00:06:07.051 --> 00:06:09.652 Dies entspricht 56 kbps. 00:06:09.652 --> 00:06:20.577 Da 8 Bits 1 Byte entsprechen, haben wir die Annahme gemacht, dass 10 Bits 1 MB sind. 00:06:20.617 --> 00:06:23.859 Dies bedeutet, dass 7000 Zeichen pro Sekunde übertragen werden. 00:06:25.800 --> 00:06:32.464 Die Berechnung erfolgt, indem man 56.000 Bits durch 8 Bits pro Byte teilt, was 7000 Zeichen ergibt. 00:06:32.464 --> 00:06:44.129 Eine Übertragungsgeschwindigkeit von 7,2 Megabit pro Sekunde bedeutet ungefähr 1 Million Zeichen pro Sekunde. 00:06:46.591 --> 00:06:51.094 Wie laden wir Daten von A herunter, wie laden wir Daten auf A hoch? 00:06:52.595 --> 00:06:56.738 Lass uns das lernen. 00:06:57.198 --> 00:06:58.599 Dann gehen wir zum Beispiel von hier weg. 00:07:02.836 --> 00:07:04.017 Wir wählen ein Ö aus. 00:07:04.057 --> 00:07:07.041 Wir klicken mit der rechten Maustaste darauf. 00:07:07.221 --> 00:07:08.843 Wir drücken auf "Herunterladen". 00:07:09.784 --> 00:07:10.304 Danach... 00:07:12.487 --> 00:07:13.408 Es gibt einige Aufgaben. 00:07:13.428 --> 00:07:14.909 Du bist offline, offline. 00:07:14.970 --> 00:07:16.251 Ich bin nicht offline, du bist offline. 00:07:24.355 --> 00:07:28.317 Wenn wir den rechten Mausklick ausführen, wird die rechte Maustaste gedrückt. 00:07:28.577 --> 00:07:37.201 Auf der anderen Seite, wenn Sie ein beliebiges Dokument hier ablegen und es dann loslassen, wird der Upload durchgeführt. 00:07:37.241 --> 00:07:38.141 Ein sehr einfacher Vorgang. 00:07:44.044 --> 00:07:48.466 Ja, schließlich wichtige Informationen zum Herunterladen und Hochladen. 00:07:49.088 --> 00:07:56.532 Die maximale Leistung, die für den Datentransfer aus dem Internet oder in das Internet erzielt werden kann, wird von den Betreibern der A-Netze festgelegt, wie zum Beispiel Türk Telekom. 00:07:57.593 --> 00:08:01.015 Bei dieser Festlegung wird in der Regel die Download-Geschwindigkeit als Hauptkriterium verwendet. 00:08:01.135 --> 00:08:05.037 Wir dürfen nicht vergessen, dass die Download-Geschwindigkeit immer höher ist als die Upload-Geschwindigkeit. 00:08:05.998 --> 00:08:12.722 Bei Vergleichen von Diensten müssen wir neben der Download- und Upload-Geschwindigkeit auch auf einen weiteren Faktor achten: den Ping.

WEBVTT 00:00:01.829 --> 00:00:05.852 What is an intranet and a virtual private network VPN? 00:00:06.473 --> 00:00:10.396 An intranet is a closed network system. 00:00:11.857 --> 00:00:18.322 An example of this would be a computer network used only by the employees of a company. 00:00:19.142 --> 00:00:28.810 In this type of network, the TCP-IP protocol is used. We will learn more about what the TCP-IP protocol is in the upcoming sections of our module. 00:00:29.670 --> 00:00:36.893 Due to this technical similarity, the management style of the internet shows great similarities with the internet. 00:00:37.093 --> 00:00:41.694 For example, if you think of the internet as the world, you can think of the internet as a country. 00:00:43.895 --> 00:00:46.056 What is the purpose of an intranet and where is it used? 00:00:49.059 --> 00:01:03.412 We mentioned that the network created by a company within especially or government agencies or school educational institutions is called an intranet. 00:01:03.432 --> 00:01:04.833 But certain security measures need to be taken when entering this intranet, and the primary security measure is the virtual private network, VPN. 00:01:06.034 --> 00:01:16.163 So, what is VPN, friends? 00:01:20.108 --> 00:01:23.171 VPN stands for Virtual Private Network in English. 00:01:23.391 --> 00:01:25.873 Its Turkish equivalent is exactly Virtual Private Network. 00:01:26.934 --> 00:01:30.397 VPN transfers private data over a public network. 00:01:31.678 --> 00:01:37.083 A Virtual Private Network, or VPN, is a network that can only be read and used by authorized individuals. 00:01:38.510 --> 00:01:45.597 For this, a username and password or a fee for username and password for specific services is required. 00:01:45.757 --> 00:01:57.209 If you need to access the internet and VPN at any company, educational institution, or similar place, this service is provided to you for free. 00:01:59.936 --> 00:02:07.306 The basic information related to VPN, which stands for Virtual Private Network, is that the connection between private and public networks is made through a digital tunnel. 00:02:07.746 --> 00:02:11.591 At one end of the tunnel, there is a VPN client, and at the other end, there is a VPN server. 00:02:11.651 --> 00:02:17.739 So, you can think of it as a tunnel between the door opening to the intranet and the door opening from your computer. 00:02:20.115 --> 00:02:24.159 VPN transmits virtual private data encrypted from two ends. 00:02:24.258 --> 00:02:27.662 This encryption process takes place. 00:02:27.702 --> 00:02:30.304 There are various details of this encryption process. 00:02:30.365 --> 00:02:33.668 We will discuss these in more detail in the upcoming sections. 00:02:36.452 --> 00:02:43.394 But another information we need to remember is that the connection between ISPs and VPNs is provided by the internet service provider. 00:02:43.413 --> 00:02:54.877 So, if it weren't for Turk Telekom, Superonline, or Turkcell, the connection between VPN and the computer or the connection between the internet and the computer 00:02:55.017 --> 00:02:55.517 would not be possible. 00:02:59.873 --> 00:03:03.397 Let's provide a bit more information about what VPN is used for, friends. 00:03:15.063 --> 00:03:16.924 Because our data is encrypted. 00:03:17.663 --> 00:03:23.445 A Virtual Private Network, VPN, is a system that allows employees, especially those on the go or working from home, to access the company network. 00:03:23.525 --> 00:03:31.928 Today, due to the need for remote work, home office, and remote access to systems, virtual private networks are used very frequently. 00:03:33.568 --> 00:03:37.829 It is actually beneficial to use VPN for every internet session for security purposes. 00:03:37.929 --> 00:03:43.271 For example, personally, I always use VPN when doing banking transactions or similar activities. 00:03:44.434 --> 00:03:49.137 We will provide many paid and free VPN services for personal use. 00:03:49.677 --> 00:03:59.603 Regarding the quality of free VPN services you use outside of the VPN provided by a company, educational institution, or government organization, 00:03:59.623 --> 00:03:59.923 you need to conduct serious research. 00:04:00.803 --> 00:04:08.688 It is worth noting that there are not many successful free VPN software or services available today. 00:04:11.573 --> 00:04:14.175 We mentioned the relationship between VPN and the internet, right? 00:04:14.215 --> 00:04:16.958 Now, let's give examples from real life. 00:04:16.998 --> 00:04:19.540 For instance, you are a sales representative. 00:04:20.480 --> 00:04:26.866 After making a sale, you immediately get back in your car and want to access the company system after visiting a customer. 00:04:27.286 --> 00:04:30.969 You have enabled cellular data through your mobile phone. 00:04:31.069 --> 00:04:33.712 This is called a personal hotspot in English. 00:04:34.492 --> 00:04:39.053 You turned it on and immediately connected to the company's internet via a VPN, and sent it. 00:04:39.154 --> 00:04:44.176 You are working from home and you are a data analyst. 00:04:44.236 --> 00:04:50.379 To be a data analyst, you need to constantly pull data from the company's internet, database. 00:04:50.859 --> 00:04:52.220 We use VPN again. 00:04:53.871 --> 00:05:05.458 In addition, we protect all banking transactions and similar personal information, our personal data that may carry a high degree of risk, through VPN. 00:05:09.982 --> 00:05:14.065 Now, the meaning and measurement of transfer speed is up next, friends. 00:05:14.526 --> 00:05:23.634 What does the number of bits per second mean, that is, what do concepts like bits per second, kilobits per second, megabits per second, gigabits per second mean? 00:05:24.755 --> 00:05:27.577 We have explained what a bit is. 00:05:28.038 --> 00:05:29.999 Now let's advance our knowledge a bit more. 00:05:31.620 --> 00:05:37.763 We used the bit in relation to computer memory, now we will use it in relation to speed, internet speed. 00:05:37.843 --> 00:05:43.765 The speed at which data is transmitted at point A is determined by how many bits of data can be transmitted per second. 00:05:43.805 --> 00:05:47.687 We arrive at the concept of fast or slow relatively in this way. 00:05:47.807 --> 00:05:51.309 A standard modem transmits at 56 thousand bits per second through an analog telephone line. 00:05:53.527 --> 00:05:59.889 In Turkish, this is written as 56kbps. 00:06:01.189 --> 00:06:03.110 The English equivalent of this is Kilobyte per second. 00:06:03.150 --> 00:06:06.951 A standard modem is technically referred to as a 56k modem. 00:06:07.051 --> 00:06:09.652 This comes from 56kbps. 00:06:09.652 --> 00:06:20.577 Since 8 bits represent 1 byte, and assuming you know 8 bits as 10, we based our assumption on 10 bits being 1 MB. 00:06:20.617 --> 00:06:23.859 This means that 7000 characters are transmitted in 1 second. 00:06:25.800 --> 00:06:32.464 The calculation is as follows: dividing 56000 bits by 8 bits per byte gives us 7000 characters. 00:06:32.464 --> 00:06:44.129 At a transfer speed of 7.2 megabits per second, this roughly translates to about 1 million characters per second. 00:06:46.591 --> 00:06:51.094 How do we download data from A, how do we upload data to A? 00:06:52.595 --> 00:06:56.738 Let's learn how to do this. 00:06:57.198 --> 00:06:58.599 Then we move on from here, for example. 00:07:02.836 --> 00:07:04.017 We select a letter 'ö'. 00:07:04.057 --> 00:07:07.041 We right-click on it. 00:07:07.221 --> 00:07:08.843 We click on the download command. 00:07:09.784 --> 00:07:10.304 Then... 00:07:12.487 --> 00:07:13.408 There are some tasks. 00:07:13.428 --> 00:07:14.909 You are offline, offline. 00:07:14.970 --> 00:07:16.251 I'm not, you're offline. 00:07:24.355 --> 00:07:28.317 When we say 'download the right sidebar', this action is performed. 00:07:28.577 --> 00:07:37.201 On the other hand, when you drag and drop any document here, the upload is also done. 00:07:37.241 --> 00:07:38.141 A very simple process. 00:07:44.044 --> 00:07:48.466 Yes, finally, important information about downloading and uploading. 00:07:49.088 --> 00:07:56.532 The maximum performance that can be achieved for data transfer over the internet is determined by operators such as A operators, for example, Türk Telekom. 00:07:57.593 --> 00:08:01.015 When making this determination, download speed is generally used as the main criterion. 00:08:01.135 --> 00:08:05.037 We must not forget that download speed is always higher than upload speed. 00:08:05.998 --> 00:08:12.722 In comparisons made regarding services, we need to pay attention not only to download and upload speeds but also to the code.

WEBVTT 00:00:01.829 --> 00:00:05.852 Intranet ve sanal özel ağ VPN nedir? 00:00:06.473 --> 00:00:10.396 Intranet kapalı bir ağ sistemidir. 00:00:11.857 --> 00:00:18.322 Bu duruma örnek olarak yalnızca bir şirketin çalışanları tarafından kullanılan bir bilgisayar ağını gösterebiliriz. 00:00:19.142 --> 00:00:28.810 Bu tip bir ağda TCP-IP protokolü kullanılır TCP-IP protokolü ne olduğunu ilerleyen bölümlerde modülümüzün diğer ünitelerini de göreceğiz. 00:00:29.670 --> 00:00:36.893 Bu teknik benzerlik sebebiyle internetin yönetim biçimi internet ile büyük benzerlikler göstermektedir. 00:00:37.093 --> 00:00:41.694 Mesela interneti dünya olarak düşündüğünüzde, interneti bir ülke olarak düşünebilirsiniz. 00:00:43.895 --> 00:00:46.056 Intranet ne işe yarar ve nerede kullanılır? 00:00:49.059 --> 00:01:03.412 İnternet şirketlerin içerisindeki özellikle veya devlet birimleri içerisinde veya okul eğitim kurumlarında kendi ağını oluşturmuş bir şirketin oluşturduğu 00:01:03.432 --> 00:01:04.833 ağa verilen ad demiştik. 00:01:06.034 --> 00:01:16.163 Fakat bu intranete giriş esnasında belirli güvenlik önlemleri alınması gerekir ve bu güvenlik önlemlerinin başında ise sanal özel ağ yani VPN gelir. 00:01:18.407 --> 00:01:20.048 Peki VPN nedir arkadaşlar? 00:01:20.108 --> 00:01:23.171 VPN İngilizcesi Virtual Private Network. 00:01:23.391 --> 00:01:25.873 Türkçesi birebir olarak sanal özel A. 00:01:26.934 --> 00:01:30.397 Özel verileri genel bir A aktarır VPN. 00:01:31.678 --> 00:01:37.083 Sanal özel A yani VPN yalnızca yetkili kişiler tarafından okunabilen ve kullanılabilen bir A'dır. 00:01:38.510 --> 00:01:45.597 Bunun için bir kullanıcı adı parola veya belirli hizmetler için yine kullanıcı adı parola üzerine bir ücret ödenmesi gerekir. 00:01:45.757 --> 00:01:57.209 Herhangi bir şirket eğitim kurumu veya benzeri bir yerde internet ve VPN yoluyla açmanız gerekiyorsa size bu servis bedava sağlanır. 00:01:59.936 --> 00:02:07.306 VPN yani sanal özel ağıyla ilgili olan temel bilgi, özel ve genel ağların arasındaki bağlantının dijital bir tünelden yapılmasıdır. 00:02:07.746 --> 00:02:11.591 Tünelin bir ucunda VPN istemcisi, diğer ucunda VPN sunucusu vardır. 00:02:11.651 --> 00:02:17.739 Yani intranet'e açılan kapı ve sizin bilgisayarınızdan açılan kapının arasında bir tünel gibi düşünebilirsiniz. 00:02:20.115 --> 00:02:24.159 VPN yani sanal özel verileri iki uçtan şifreli olarak iletir. 00:02:24.258 --> 00:02:27.662 Bu şifrelendirme prosedürü üzerinden gerçekleşir. 00:02:27.702 --> 00:02:30.304 Bu şifrelendirme prosedürünün çeşitli detayları var. 00:02:30.365 --> 00:02:33.668 Bunları da ilerleyen bölümlerde daha detaylı bir şekilde ele alacağız. 00:02:36.452 --> 00:02:43.394 Ama unutmamız gereken diğer bir bilgiyse, İslamcılar ile VPN arasındaki bağlantı internet servis sağlayıcısı tarafından sağlanır. 00:02:43.413 --> 00:02:54.877 Yani Türk Telekom olmasa veya süper online olmasa ya da Türksel olmasa VPN ve bilgisayar arasındaki bağlantı veya internet ile bilgisayar arasındaki bağlantı 00:02:55.017 --> 00:02:55.517 mümkün olmayacak. 00:02:59.873 --> 00:03:03.397 Ne işe yaradığı konusunda VPN'in biraz daha bilgi verelim arkadaşlar. 00:03:15.063 --> 00:03:16.924 Çünkü verilerimiz şifrelendirilmiştir. 00:03:17.663 --> 00:03:23.445 Sanal özel ağ, VPN özellikle çalışanların yoldayken ya da evden şirket alanına erişmesini mümkün kılan bir sistemdir. 00:03:23.525 --> 00:03:31.928 Günümüzde evden çalışma, home office ve sistemlere uzaktan ulaşım ihtiyaçları sebebiyle sanal özel ağlar son derece sıklıkla kullanılır. 00:03:33.568 --> 00:03:37.829 Güvenlik amacıyla VPN'in her internet oturumunda kullanılmasında aslında fayda vardır. 00:03:37.929 --> 00:03:43.271 Mesela ben kişisel olarak bankacılık işlemleri, benzeri işlemleri yaparken VPN kullanıyorum hep. 00:03:44.434 --> 00:03:49.137 Kişisel kullanım için birçok ücretli ve ücretsiz VPN hizmeti sağlayacağız. 00:03:49.677 --> 00:03:59.603 Şirket veya eğitim kurumu veya devlet organizasyonlarında size verilen VPN dışında kullanacağınız ücretsiz VPN hizmetlerinin kalitesiyle ilgili ciddi araştırma 00:03:59.623 --> 00:03:59.923 yapmanız lazım. 00:04:00.803 --> 00:04:08.688 Günümüzde ücretsiz olarak kullanılan başarılı VPN yazılımları veya servislerinin çok da fazla olmadığının altını çizmekte fayda var. 00:04:11.573 --> 00:04:14.175 VPN ve internet arasındaki ilişki nedir demiştik? 00:04:14.215 --> 00:04:16.958 Şimdi gerçek hayattan örnekler verelim. 00:04:16.998 --> 00:04:19.540 Mesela bir satış temsilcisiniz. 00:04:20.480 --> 00:04:26.866 Yaptığınız bir satışı hemen arabaya tekrar bindiniz müşteri ziyaretinden sonra şirket sistemine girmek istiyorsunuz. 00:04:27.286 --> 00:04:30.969 Cep telefonunuz aracılığıyla bir hücresel veri açtınız. 00:04:31.069 --> 00:04:33.712 İşte bunu personal hotspot deniyor İngilizcesi. 00:04:34.492 --> 00:04:39.053 açtınız ve hemen VPN aracıyla şirketin internetine bağlandınız, gönderdiniz. 00:04:39.154 --> 00:04:44.176 Evden çalışıyorsunuz ve bir veri analistisiniz, data analistisiniz. 00:04:44.236 --> 00:04:50.379 Data analist olabilmek için datayı sürekli şirket internetinden, veri tabanından çekmeniz lazım. 00:04:50.859 --> 00:04:52.220 Yine VPN kullanırız. 00:04:53.871 --> 00:05:05.458 Bunun dışında tüm bankacılık işlemlerini ve benzeri kişisel bilgilerimizi yüksek derecede risk taşıyabilecek kişisel verilerimizi VPN aracılığıyla biz koruruz. 00:05:09.982 --> 00:05:14.065 Şimdi sırada aktarım hızının anlamı ve ölçümü var arkadaşlar. 00:05:14.526 --> 00:05:23.634 Saniyedeki bit sayısı yani bir saniyedeki bit, bir saniyedeki kilobit, bir saniyedeki megabit, saniye başına gigabit kavramları ne anlama gelir? 00:05:24.755 --> 00:05:27.577 Yani bitin ne olduğunu açıklamıştık. 00:05:28.038 --> 00:05:29.999 Şimdi bilgimizi biraz daha ilerletelim. 00:05:31.620 --> 00:05:37.763 Bit'i biz bilgisayar hafızasıyla ilgili kullandık, şimdi hızla ilgili kullanacağız, internet hızıyla ilgili kullanacağız. 00:05:37.843 --> 00:05:43.765 Bir A'da verinin iletilme hızı, saniyede kaç bit veri iletilebildiğine göre tayin edilir. 00:05:43.805 --> 00:05:47.687 Hızlı veya yavaş kavramına göreceli olarak bu şekilde varırız. 00:05:47.807 --> 00:05:51.309 Standart bir modem, analog telefonu hatta aracılığıyla saniyede 56 bin bit. 00:05:53.527 --> 00:05:59.889 Bunun Türkçe karşılayalım 56kbps olarak yazılır. 00:06:01.189 --> 00:06:03.110 Kilobyte per second bunun İngilizcesi. 00:06:03.150 --> 00:06:06.951 Standart bir modem teknik olarak 56k modem olarak adlandırılır. 00:06:07.051 --> 00:06:09.652 Bu da 56kbps'den gelir. 00:06:09.652 --> 00:06:20.577 8 bit 1 byte'i temsil ettiğinden ki biz 8 bit'i biliyorsunuz 10 olarak alıp oradan 10 bit'in 1 MB olduğu varsayımın üzerine durduk. 00:06:20.617 --> 00:06:23.859 Bu durum 7000 karakterin 1 saniyede iletildiği anlamına gelir. 00:06:25.800 --> 00:06:32.464 Bunun da hesaplamanın yolu 56000 bit eğer 1 byte 8 bitse böldüğümüzü 7000 karaktere geliyor. 00:06:32.464 --> 00:06:44.129 7.2 megabit aktarım hızında bu saniyede yaklaşık 1 milyon karakter anlamına gelir. 00:06:46.591 --> 00:06:51.094 Bir A'dan nasıl veri indiririz, bir A'a nasıl veri yükleriz? 00:06:52.595 --> 00:06:56.738 Gelin bunu yapmayı öğrenelim. 00:06:57.198 --> 00:06:58.599 Sonra buradan gidiyoruz mesela. 00:07:02.836 --> 00:07:04.017 Bir tane ö'yi seçiyoruz. 00:07:04.057 --> 00:07:07.041 Sağ fare düğmesine basıyoruz üzerine. 00:07:07.221 --> 00:07:08.843 İndir komutuna basıyoruz. 00:07:09.784 --> 00:07:10.304 Daha sonra... 00:07:12.487 --> 00:07:13.408 Bazı işler var. 00:07:13.428 --> 00:07:14.909 Çevrim dışısın, çevrim dışı. 00:07:14.970 --> 00:07:16.251 Değilim sensin, çevrim dışı. 00:07:24.355 --> 00:07:28.317 Sağ fayol ümitesi baskını indir dediğimizde bu işlem gerçekleştiriliyor. 00:07:28.577 --> 00:07:37.201 Diğer bir yandan da alıp herhangi bir belgeyi sürüp de bırak yöntemiyle buraya bıraktığınızda da yükleme gerçekleşiyor. 00:07:37.241 --> 00:07:38.141 Çok basit bir işlem. 00:07:44.044 --> 00:07:48.466 Evet, son olarak indirme ve yükleme ile ilgili önemli bilgiler. 00:07:49.088 --> 00:07:56.532 İnternetten veya internete veri aktarımı için oluşturabilecek maksimum performans A operatörleri tarafından belirlenmektedir mesela Türk Telekom. 00:07:57.593 --> 00:08:01.015 Bu belirleme yapılırken genellikle indirme hızı ana kıstas olarak kullanılır. 00:08:01.135 --> 00:08:05.037 Unutmamalıyız ki indirme hızı, yükleme hızından her zaman daha yüksektir. 00:08:05.998 --> 00:08:12.722 Servislerle ilgili yapılan karşılaştırmalarda indirme ve yükleme hızı yanı sıra bir de kodaya dikkat etmemiz gerekiyor.