{"id":30666,"date":"2015-05-13T05:15:23","date_gmt":"2015-05-13T05:15:23","guid":{"rendered":"http:\/\/vskills.in\/certification\/blog\/?p=30666"},"modified":"2024-04-03T13:16:55","modified_gmt":"2024-04-03T07:46:55","slug":"osi-reference-model","status":"publish","type":"post","link":"https:\/\/www.vskills.in\/certification\/blog\/osi-reference-model\/","title":{"rendered":"OSI REFERENCE MODEL"},"content":{"rendered":"

\"OSI<\/a><\/p>\n

OSI model:-<\/strong><\/em><\/p>\n

The model deals with connecting open systems i.e. systems open for communication with one another.<\/p>\n

7 Layers of OSI model<\/strong><\/em> explained<\/strong>:-<\/strong><\/p>\n

A) The Physical Layer:-<\/strong><\/p>\n

1- It is concerned with transferring raw bits over a communication channel.<\/p>\n

2- The design to be tackled here include, that when one side sends a 1 the other side also receives it as 1 \u00a0bit, and not a 0 bit.<\/p>\n

B) The Data Link Layer:-<\/strong><\/p>\n

1. The main task here is to transform a raw transmission facility into a line that appears free of undetected transmission errors to the network layer.<\/p>\n

2. It accomplishes this by having the sender break in data into frames and transmit frames sequentially.<\/p>\n

3. The receiver sends back the acknowledgement frame,after conferming receipt of each frame.<\/p>\n

C)The Network Layer:-<\/strong><\/p>\n

1. It controls the operation of the subnet.<\/p>\n

2. The key design issue here is determining how packets are routed from source to destination. It also controls the congestion problem to avoid collision between packets.<\/p>\n

D)The Transport Layer:-<\/strong><\/p>\n

1. Basic function here is to accept data from above , split it up into smaller units , pass these to the network layer and ensure pieces all arrive correctly at the other end. The function thus should be performed efficiently.<\/p>\n

2. It also determines what type of service to provide to the session layer and ultimately to the users if the network.<\/p>\n

E) The Session Layer:-<\/strong><\/p>\n

1. It allows users on different machines to establish sessions between them.<\/p>\n

2. Session offers various services including dialogue control, token management and synchronization.<\/p>\n

F) The Presentation Layer:-<\/p>\n

1. It is concerned with the syntax and semantics of the information transmitted.<\/p>\n

2. It is used to define data structures, along with a standard encoding to be used on wire.<\/p>\n

G) The Application Layer:-<\/strong><\/p>\n

1. It contains a variety of protocols that are commonly needed by users.<\/p>\n

2. For ex. HTTP and other file transfer , electronic mail and network news protocols.<\/p>\n

Click here for government certification in Information Technology<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

OSI model:- The model deals with connecting open systems i.e. systems open for communication with one another. 7 Layers of OSI model explained:- A) The Physical Layer:- 1- It is concerned with transferring raw bits over a communication channel. 2- The design to be tackled here include, that when one side sends a 1 the…<\/p>\n","protected":false},"author":876,"featured_media":30773,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[920],"tags":[3693,3647],"class_list":["post-30666","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-information-technology","tag-layers","tag-osi-model"],"acf":[],"yoast_head":"\nOSI REFERENCE MODEL - Vskills Blog<\/title>\n<meta name=\"description\" content=\"The 7 layers of OSI model are physical layer, data link layer, network layer, transportation layer, session layer, presentation layer, etc. Click here\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vskills.in\/certification\/blog\/osi-reference-model\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"OSI REFERENCE MODEL - Vskills Blog\" \/>\n<meta property=\"og:description\" content=\"The 7 layers of OSI model are physical layer, data link layer, network layer, transportation layer, session layer, presentation layer, etc. Click here\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vskills.in\/certification\/blog\/osi-reference-model\/\" \/>\n<meta property=\"og:site_name\" content=\"Vskills Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/vskills.in\" \/>\n<meta property=\"article:published_time\" content=\"2015-05-13T05:15:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-03T07:46:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vskills.in\/certification\/blog\/wp-content\/uploads\/2015\/05\/OSI-REFERENCE-MODEL.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"176\" \/>\n\t<meta property=\"og:image:height\" content=\"196\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Supreet Kaur\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Supreet Kaur\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.vskills.in\/certification\/blog\/osi-reference-model\/\",\"url\":\"https:\/\/www.vskills.in\/certification\/blog\/osi-reference-model\/\",\"name\":\"OSI REFERENCE MODEL - 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