Network Security at OSI Layers Muhammad Muzammil Syed Zeeshan Nasir Department of computer science FUUAST‚ Islamabad 1-OSI Model: In 1983‚ the International Organization for Standardization (ISO) and the International Telegraph and Telephone Consultative Committee (CCITT) merged documents and developed the OSI model‚ which is based on a specific hierarchy where each layer builds on the output of each adjacent layer. The OSI model is a protocol stack where the lower layers deal primarily
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NETWORK Computer Network also called Network is a group of computers and other devices connected to each other to share resources electronically. Networks can be as small as two computers or many thousand computers that are connected to one another. These computers are usually connected to one another through wires‚ satellite‚ and modems. Each device connected to the network is called a “node”‚ and the computer that is connected to the network is called a workstation. There are several ways
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OSI LAYERS PROTOCOL EQUIPMENT AT THE LAYERS Some of the layers use equipment to support the identified functions. Hub related activity is “Layer One”. The naming of some devices designates the functional layer such as “Layer Two Switch” or “Layer Three Switch”. Router functions focus on “Layer Three”
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BUYUKHAN COMPUTER NETWORKS NETWORK TELEPHONY –VOICE OVER INTERNET PROTOCOL(VoIP) VoIP is a set of technologies that enable voice calls to be carried over the internet (or other networks designed for data)‚ rather than the traditional telephone landline system-the Public Switched Telephone Networks(PSTN). VoIP uses IP protocols‚ originally designed for the internet‚ to break voice calls up into digital ‘packets’. In order for a call to take place the separate packets travel over an IP network and
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COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF ELECTRONICS AND COMMUNICATIONS ENGINEERING ECE562 D Sat (10:30 – 1:30 pm) Experiment #3: CORE NETWORK PLANNING - EPC & SAE and CSN EQUIPMENTS SPECIFICATIONS PARAMETERS AND CAPACITY PLANNING Submitted by: CYNDY J. GARCIA Submitted to: Engr. JULIUS ESCOBAR 2nd SEM 2010-2011 CONTENTS I. Introduction 1 II. Discussion ------------------------------------------------------------------------------------1
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computer network Connects three office computers and one computer used for Point-of-Sale (POS) services at each of your stores. You also want six (6) computers in the lobby/store where patrons can download music and you can run “training classes” for people to learn about using MP3 players and get other basic information. The two offices have to be connected into one cohesive network‚ sharing POS services and other critical company information. You also need to provide a “hand out” casual
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A study of Distribution Channel of Hindustan Unilever Limited By Anubhav Jaiswal 2011195 Introduction HUL works to create a better future every day and helps people feel good‚ look good and get more out of life with brands and services that are good for them and good for others. With over 35 brands spanning 20 distinct categories such as soaps‚ detergents‚ shampoos‚ skin care‚ toothpastes‚ deodorants‚ cosmetics‚ tea‚ coffee‚ packaged foods‚ ice cream‚ and water purifiers‚ the Company is
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Dell Distribution Network I. Direct sales model Dell current distribution network is direct sales model‚ this online sale refer to the fact that Dell does not use the retails channel‚ but sells its personal computers (PCs) directly to customers through its website www.dell.com. Dell does not make sales through any integrators or resellers‚ nor does it utilize any channel service profit margins. Sales are made by the collaborative efforts of the Dell’s task force and by means of advertisement. Customers
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COMPUTER NETWORKS 4TH MARCH 2012 Examination Paper Answer ALL questions. Clearly cross out surplus answers. Time: 2 hours Any reference material brought into the examination room must be handed to the invigilator before the start of the examination. ANSWER ALL QUESTIONS Marks QUESTION 1 a) State FOUR (4) principles underpinning the Open Systems Interconnection (OSI) Reference Model. b) Describe the purpose of the physical layer of the OSI Reference Model. c) State THREE (3) elements
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Build a Computer Network Table of Contents Build a computer Network ……………………………………………………….. 1 What is a computer…….……………………………………………………………. 2 (b) What are the main types of computers used in a Network? … 2 What is a Network…………………………….…………………………………… 3 What hardware and software is found in a computer network……….. 4-9 Conclusion ……………………………………………………………………………. 10 Basic information on students assigned to do this project……………… 11 Build a Computer Network What
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