COMPUTER NETWORKS [R15A0513] LECTURE NOTES MALLA
“Computer network'' to mean a collection of autonomous computers interconnected by a single technology. Two computers are said to be interconnected if they are
COMPUTER NETWORKS Lecture Notes
COMPUTER NETWORKS. Lecture Notes. Course Code - BCS-308. Course Name - INTERNET & WEB TECHNOLOGY-I (3-1-0). Cr.-4. DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING
LECTURE NOTES ON COMPUTER NETWORKS
Computer networks. J.Vinoth kumar. UNIT- I. Introduction. An interconnected collection of autonomous computers is called a computer network. Two computers are
Computer Networks
A computer network (Figure 10.2) is an interconnection among two or more computers or computing devices. Such interconnection allows computers to share data and
Computer Network : Lecture Notes
IIT Computer Network Video lectures. 7. Wiki-pedia. Page: 1 compiled by: JP NEC. Daya Ram Budhathoki. Computer Network : Lecture Notes. Nepal Engineering
Basic Networking Concepts
-Consists of connecting several computer networks based on different protocols. -Requires the definition of a common interconnection protocol on top the local
COMPUTER NETWORKS Lecture Notes
DATA COMMUNICATION & COMPUTER NETWORKS (3-1-0) (Cr.-4) BCS 304. Module – I(12 Lectures). Overview of Data Communications and Networking.
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Computer-based Symmetric Key Cryptographic Algorithms: Algorithm Types and Modes. An overview of Symmetric Key Cryptography
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Explain computer networks. ✓. Discuss the need of network in today's world. ✓. State the advantages of network. ✓.
Wired warfare: Computer network attack and jus in bello
Of particular note will be the impact of information warfare on the principles of interna- tional humanitarian law — and vice versa. In brief information
COMPUTER NETWORKS [R15A0513] LECTURE NOTES MALLA
“Computer network'' to mean a collection of autonomous computers interconnected by a single technology. Two computers are said to be interconnected if they are
Basic Networking Concepts
-A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. -Each of the devices on the
COMPUTER NETWORKS Lecture Notes
A network is a group of connected communicating devices such as computers and printers. An internet (note the lowercase letter i) is two or more networks that
LECTURE NOTES ON COMPUTER NETWORKS
An interconnected collection of autonomous computers is called a computer network. Two computers are said to be interconnected if they are able to exchange
Computer Networks
A computer network (Figure 10.2) is an interconnection among two or more computers or computing Figure 10.4: A Personal Area Network. NOTES. 2022-23 ...
Computer Network : Lecture Notes
Computer Network : Lecture Notes. Nepal Engineering College. Prepared by: Junior Professor: Daya Ram Budhathoki. Nepal Engineering college Changunarayan.
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Writes Notes on (Draw diagrams when necessary). 1. Types of networks. 2. Client Server Model. 3. Internetworks. 1.7 SUGGESTED READINGS. 1. Computer Networks
DIGITAL NOTES ON COMPUTER NETWORKS B.TECH III YEAR - II
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LECTURE NOTES. ON. COMPUTER NETWORKS. IV B. Tech I semester. Mr. P. Ravinder. Associate Professor. ELECTRONICS AND COMMUNICATION ENGINEERING.
Data Communication and Computer Network
Computers may connect to each other by either wired or wireless media. Classification of Computer Networks. Computer networks are classified based on various
In this Chapter
Introduction to Computer
Networks
Evolution of Networking
Types of Networks
Network Devices
Networking Topologies
Identifying Nodes in a Networked Communication
Internet, Web and the Internet of Things
Domain Name System
C h a pt e r "Hoaxes use weaknesses in human behavior to ensure they are replicated and distributed. In other words, hoaxes prey on the Human Operating System." - Stewart Kirkpatrick10.1 INTRODUCTION TO COMPUTER NETWORKS
We are living in a connected world. Information
is being produced, exchanged, and traced across the globe in real time. It's possible as almost everyone and everything in the digital world is interconnected through one way or the other. Figure 10.1: Interconnection forming a social networkComputer Networks
10Chpater-10.indd 18111-09-2020 16:41:16
COMPUTER SCIENCE - CLASS XIICOMPUTER NETWORKS
182A group of two or more similar things or people
interconnected with each other is called network (Figure10.1). Some of the examples of network in our everyday
life includes:Social network
Mobile network
Network of computers
Airlines, railway, banks, hospitals networks
A computer network (Figure 10.2) is an interconnection among two or more computers or computing devices. Such interconnection allows computers to share data and resources among each other. A basic network may connect a few computers placed in a room.The network size may vary from small to large
depending on the number of computers it connects.A computer network can include different types of
hosts (also called nodes) like server, desktop, laptop, cellular phones.Figure 10.2: A computer network
Apart from computers, networks include networking
devices like switch, router, modem, etc. Networking devices are used to connect multiple computers in different settings. For communication, data in a network is divided into smaller chunks called packets. These packets are then carried over a network. Devices in a network can be connected either through wired media like cables or wireless media like air.In a communication network, each device that is a
part of a network and that can receive, create, store or send data to different network routes is called a node. In the context of data communication, a node can be a device such as a modem, hub, bridge, switch, router, digital telephone handset, a printer, a computer or a server.Activity 10.1
Identify some other
networks in the real world.Chpater-10.indd 18211-09-2020 16:41:17
COMPUTER SCIENCE - CLASS XIICOMPUTER NETWORKS
183Interconnectivity of computing devices in a network allows us to exchange information simultaneously with many parties through email, websites, audio/video calls, etc. Network allows sharing of resources. For example, a printer can be made available to multiple computers through a network; a networked storage can be accessed by multiple computers. People often connect their devices through hotspot, thus forming a small personal network.
10.2 EVOLUTION OF NETWORKING
In the 1960s a research project was commissioned by Advanced Research Projects Agency Network (ARPANET) in the U.S. Department of Defence to connect the academic and research institutions located at different communicated between the University of California, Los Angeles (UCLA) and Stanford Research Institute (SRI).Slowly but gradually, more and more organisations
joined the ARPANET, and many independent smaller networks were formed. Few of the milestones in theMRXUQH\RIHYROXWLRQRIFRPSXWHUQHWZRUNV
is depicted in the timeline shown in Figure 10.3.Activity 10.2
Create a hotspot using
a smartphone and connect other devices to it.Domain Name System
introducedThe term Internet was
coined,First commercial use of
ARPANET, was started
in the name of TelenetThe idea of Advanced
Research Project Agency
Network (ARPANET) is
conceptualizedTCP/IP introduced as standard protocol onARPANET
Roy Tomlinson develops
network messaging orE-mail. Symbol @
comes to mean "at"National ScienceFoundation brings
connectivity to more people with its NSFNET program 19861997
1990
1983
1969
1982
1961
1971
1974
Figure 10.3: Timeline showing evolution of networking chpater-10.indd 18311-09-2020 16:41:17
COMPUTER SCIENCE - CLASS XIICOMPUTER NETWORKS
18410.3 TYPES OF NETWORKS
There are various types of computer networks ranging from network of handheld devices (like mobile phones or tablets) connected through Wi-Fi or Bluetooth within a single room to the millions of computers spread across the globe. Some are connected wireless while others are connected through wires.Based on the geographical area covered and data
transfer rate, computer networks are broadly categorised as:PAN ( Personal Area Network)
LAN (Local Area Network)
MAN (Metropolitan Area Network)
WAN (Wide Area Network)
10.3.1 Personal Area Network (PAN)
It is a network formed by connecting a few personal devices like computers, laptops, mobile phones, smart phones, printers etc., as shown in Figure 10.4. All these devices lie within an approximate range of 10 metres.A personal area network may be wired or wireless.
For example, a mobile phone connected to the laptop through USB forms a wired PAN while two smartphones communicating with each other through Bluetooth technology form a wireless PAN or WPAN.Figure 10.4: A Personal Area Network
NOTES chpater-10.indd 18411-09-2020 16:41:17COMPUTER SCIENCE - CLASS XIICOMPUTER NETWORKS
18510.3.2 Local Area Network (LAN)
It is a network that connects computers, mobile phones, tablet, mouse, printer, etc., placed at a limited distance. The geographical area covered by a LAN can range fromVLQJOHURRPDquotesdbs_dbs17.pdfusesText_23
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