Protokol Osi. A ProtokolB Osi ModelB Perbandingan Model Osi Dengan TCP/IPProtokol adalah aturan atau sekumpulan aturan dan standar yang memungkinkan komputer untuk dapat saling berkomunikasi Bagi komputer pengirim (sender) maupun penerima (receiver) yang terlibat dalam sebuah proses pengiriman data mereka harus dapat mendeteksi dan menggunakan protokol yang sama Untuk melakukan pertukaran data sender dan receiver (host) harus sepakat tentang bagaimana bentuk dan arti data tersebut misalya ketika sebuah host mengirimkan data 1 dan 0 ke host lainnya kedua host harus sepakat tentang arti dari data 1 dan 0 yang dikirimkan itu Hal ini serupa dengan dua orang yang akan melakukan sebuah percakapan mereka harus setuju tentang siapa yang akan berbicara pertama kali bagaimana mengungkapkannya bagaimana memahaminya sehingga dapat dimengerti dan bagaimana cara mengakhiri percakapan tersebut Seperti dapat dilihat pada gambar 1 kabayan sebagai host mencoba untuk berkomunkasi dengan host lainnya Gambar 1 Kabayan mencoba berbicara dengan Kang Kemod Pada tahun 1977 ISO (International Organization for Standarization) menetapkan OSI (Open Standard Interconnection) sebagai standar bagi komunikasi data OSI adalah sebuah standar baku dan ia hanyalah sebuah model rujukan jika kita misalkan suatu model adalah sebuah pertanyaan maka protokol adalah jawabannya Suatu protokol hanya dapat menjawab satu atau beberapa pertanyaan tertentu yang spesifik atau dengan kata lain suatu protokol hanya melayani suatu lingkup wilayah yang sangat terbatas Sebuah protokol tentu saja tidak dapat menjawab semua pertanyaan yang diajukan oleh sebuah model akan tetapi dengan menggabungkan berbagai macam protokol dalam sebuah protokol suite (misalnya TCP/IP) kita dapat menjawab seluruh pertanyaan yang diajukan oleh model yang ada 1 1 Tujuh Layer OSI OSI model dibuat dengan tujuan agar komunikasi data dapat berjalan melalui langkahlangkah yang jelas langkahlangkah ini biasa disebut dengan nama “layer” dan Model OSI terdiri dari tujuh layer dengan p TCP/IP dikembangkan dengan mengacu pada model DoD (Departement of Defense) tidak seperti model OSI model DoD hanya memiliki empat layer tapi tetap saja model DoD dapat berfungsi sebagaimana model OSI Adapun perbandingan antara model OSI dan TCP/IP dapat dilihat pada gambar 5 Gambar 5 Perbandingan antara model OSI dengan model DoD atau model TCP/IP Aplication layer melingkupi Application Presentation dan Session Layer pada model OSI Transport layer serupa dengan transport layer pada model OSI Internet layer melingkupi network layer dari model OSI Network Interface layer melingkupi datalink layer dan physical layer pada model OSI 1 B Model referensi OSI dan Standarisasi Untuk menyelenggarakan komunikasi berbagai macam vendor komputer diperlukan sebuah aturan baku yang standar dan disetejui berbagai fihak Seperti halnya dua orang yang berlainan bangsa maka untuk berkomunikasi memerlukan penerjemah/interpreter atau satu bahasa yang dimengerti kedua belah fihak Dalam duni.

Fundamentals Of The Ipx Protocol Ccna Practical Studies Cisco Certification Training protokol osi
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OSI is a conceptual model developed by the International Organization for Standardization that enables various communication methods to communicate using standard protocols Although not comprehensive the simple TCP/IP model is still in use today and allowed for greater connectivity among users While the OSI 7layer model is still widely used for communicating how networks operate it also.

Understanding HTTP Protocol & OSI Model by Nisal Pubudu

SIP and OSI layer Sip is a session initiation protocol used in the VoIP network This belongs to the application layer of OSI IP and OSI layer IP is Internet Protocol it is a layer 3 protocol example of the OSI model IP uses the services of the data link layer and provides services to the transport layer The transport layer examples are.

What are the protocols in osi model? List of protocols in osi

The Open Systems Interconnection protocols are a family of information exchange standards developed jointly by the ISO and the ITUT The standardization process began in 1977 While the sevenlayer OSI model is often used as a reference for teaching and documentation the protocols originally conceived for the model did not gain popularity.

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OSI protocols Wikipedia

OSI Model: 7 layers of network protocol Lectron

Protokol OSI/TCP/IP SMK Darussholihin NW Kalijaga

What Is Http?Http vs HttpsHttp RequestsHttp ResponsesThe HTTP acronym stands for HyperText Transfer Protocol HTTP is a set of standards that allow users of the World Wide Web (WWW) to exchange information that found on web pages When accessing any web page entering “http//”in front of the address tells the web browser to communicate over HTTP For example the URL for Google is https//wwwgooglecom But if you notice today’s browsers no longer require HTTP in front of the URL since it is the default method of communication However it is kept in browsers because of the need to separate protocols such as File Transfer Protocol (FTP) HTTP is defined as a stateless “clientserver” protocol or “requestresponse” protocol Stateless means that all requests are separate from each other So every request from your browser must contain enough information on its own for the server to fulfill the request That means each request is executed without any knowledge of the requests that were executed before it or after it The clientser The S in HTTPS is stands for “secure” HTTPS uses TLS or SSL to encrypt HTTP requests and responses So basically the only difference between the two protocols is that HTTPS uses TLS (SSL) to encrypt normal HTTP requests and responses As a result HTTPS is far more secure than HTTP Because of that HTTPS can protects against eavesdropping and maninthemiddle (MitM) attacks A website that uses HTTP has “http//” in its URL while a website that uses HTTPS has “https//” When you want to access a web site using web browser you simply type the URL and press the enter So this is when a client device (web browser) asks the server for the information needed to load the website The request provides the server with the desired information it needs to adjust its response to the client device There are several HTTP request methods known as Get Post Delete Put and Head However in this case it used the Get request because it is how we get the content of that web site 1 GETThe GET method is used to retrieve information from the given server using a given URI Requests using GET should only retrieve data and should have no other effect on the data 2 HEADSame as GET but transfers the status line and header section only 3 POSTA POST request is used to send data to the server for example customer information file upload etc using HTML forms 4 PUTReplaces all current representations of the target resource with the uploaded content 5 The HTTP response message is the data that sent by the web server to a client device based on the HTTP request made by the client device Well every time there is a request HTTP will always response it The information contained in a HTTP response is modified to the context the server received from the request So whenever server response to HTTP requests usually it issues response codes indicating the request is being processed there was an error in the request or that the request is being redirected.