1.1 Firewall in computer networks Firewall: A set of related programs‚ located at a network gateway server‚ which protects the resources of a private network from users from other networks using security policies. The Internet has made large amounts of information available to the average computer user at home‚ in business and in education. For many people‚ having access to this information is no longer just an advantage‚ it is essential. Yet connecting a private network to the Internet can
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COMPUTER COMMUNICATION NETWORKS Objectives • • • • • What is telecommunication History of telecommunication Role of telecommunication in Organizations Interpersonal communication applications Computer networks What is telecommunication? “Transmission of data or audible/visible information by electrical/electronic means” e.g. telephone‚ telegraph‚ radio‚ television‚ computer networks (Internet) Basic elements 1. Transmitter : takes information and converts it to a signal 2. Transmission
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Computer Network Specialist Abdool Samad GLC2O0-B Mr. Shin Nov. 6th ‚ 2013 The reason I have chosen a Computer Network Specialists is because I love computers of what they do and what they are capable of doing and how it has helped the humans thrive and succeed in ways other species can’t. Computer Network Specialists develop‚ install‚ and maintain the networks that connect computers to each other. Their duties are to set-up computers and install
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COMPUTER NETWORK ADMINISTRATOR A computer network (the "network") is the connection of at least two or more computers for the purpose of sharing data and resources. These resources can include printers‚ Internet access‚ file sharing‚ and electronic mail ("e-mail"). In today ’s technological environment‚ most companies and businesses have some kind of network used on a daily basis. Thus‚ it is imperative to day-to-day operations that networks run smoothly. Companies employ at least one person
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UNIVERSITY OF COMPUTER & EMERGING SCIENCE Computer Network Lab ( CS-314) Lab Session 01 Lab Instructor: Shahbaz Siddiqui‚ Shoiab Raza Week 1 Network Command TASK: Use the appropriate networking commands to solve these networking problems. 1. Find the IP address of the computer you are currently using. Command: ________________________________________________________ IP address: ________________________________________________________ 2. Find the IP address of the computer you are currently
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TYPES OF COMPUTER NETWORKS: A computer networks is a communication system connecting two or more computers that work together to exchange information & share resources. A network may consist of microcomputers or it may integrate microcomputers or other devices with large computer. Networks can be controlled by all nodes co-ordinarily & supply all resource. These networks differ in geographical size. There are three important types of networks. 1. Local Area Network 2. Metropolitan Area
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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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capability to support the requirements of Ford and it appears that Ford and their dealers have not too much communication in obtaining the accurate forecast. Meanwhile I am also aware of its highly complex nature of auto manufacturing comparing with computer industry. It would be applicable for the customers to place order online as all their concerns are the price and specification. However with several 10 thousand dollars’ car‚ the customers would prefer to go to dealership to do test drive. Thirdly
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1 IS 450/650‚ Fall 2013‚ Computer Networks and the Internet Today: • Roster • Syllabus Overview (Syllabus on Blackboard) • Chapter 1 Announcements & Reminders: • 450-1 Homework 1 Due Tuesday 9/17 at 23:59. • 450-1 (TR) Test 1 Tuesday 10/1 • 450-1 (TR) Test 2 Thursday 11/7 • 450-1 (TR) Final Exam Thursday 12/19 8-10 a.m. • Suggestion: start homeworks early and send e-mail if you get stuck. Cell phones & laptops off. Reminder: if printing the notes‚ consider printing 4-up (4 pages
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match the cable type of the network. Most common hubs interconnect Category 3 or 5 twisted-pair cable with RJ-45 ends‚ although Coax BNC and Fiber Optic BNC hubs also exist. Ethernet Hubs An Ethernet hub is also called a multiport repeater. A repeater is a device that amplifies a signal as it passes through it‚ to counteract the effects of attenuation. Multistation Access Unit A Multistation Access Unit (MAU) is a special type of hub used for token ring networks. Switches Switches are
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