Network and Communication

Only available on StudyMode
  • Download(s) : 34
  • Published : May 17, 2013
Open Document
Text Preview
COMPUTER|
NETWORK AND COMMUNICATION|
|
NOTES|
|
|
|
|

INDEX (COMMUNICATION AND NETWORK CONCEPT)
I.NETWORK
II.EVALUATION OF NETWORKING 1.ARPANET III. SWITCHING TECHNIQUES
1. CIRCUIT
2. PACKET
3. MESSAGE
IV.TRANSMISSION MEDIA: Two types of media
GUIDED MEDIA 1.TWISTED PAIR CABLE
2. COAXIAL CABLE 3. OPTICAL FIBRE UNGUIDED MEDIA 1.RADIO LINKS
2. MICROWAVE LINK 3. SATELLITE LINKS 4. INFRARED LINKS V.DATA COMMUNICATIONS TERMINOLOGY

VI.TYPES OF NETWORK
1. LAN
2. MAN
3. WAN
VII.NETWORK TOPOLOGIES
1. STAR
2. BUS OR LINEAR
3. TREE
4. RING
VIII.NETWORK DEVICES
1. MODEM
2. RJ-45
3. ETHERNET CARD
4. HUB
5. SWITCH
6. REPEATERS
7. BRIDGES
8. ROUTERS
9. GATEWAYS
IX.COMMUNICATION PROTOCOL
1. HTTP
2. FTP
3. TCP/IP
4. SLIP\PPP
X.WIRELESS MOBILE COMPUTING
1. GSM 2. CDMA3. WLL
4.3G5. SMS6. E MAIL
7. VOICE MAIL8. CHAT9. VIDEO CONFERENCING
XI.INTER NETWORKING TERMS AND CONCEPTS
1. WWW
2. TELNET
3. WEB SERVER
4. WEB BROWSER
5. WEB PAGE
6. URL
7. WEB HOSTING
8. HTML
9. XML
10. DHTML
11. WEBSCRIPT
XII.SECURITY NETWORK
XIII.VIRUSES
1. TORJAN HORSES
2. WORMS
3. SPAMS

I.NETWORK
A network is an interconnected set of autonomous systems that permit distributed processing of information. Advantages of networking
i) Enable users to share resources (CPU, printers, scanners etc.) ii) Allows exchange information at a very fast rate.
iii) Reduces postal and traveling expenditure.
iv) Offers reliability. We can have copies of a file on several computers, so in case one of them is unavailable, other can be used. II.EVOLUTION OF NETWORKING
ARPANET
It stands for Advanced Research Project Agency Network. It is the first computer network designed by the Advanced Research Project Agency (ARPA) and Department of Defense (DOD) Of USA in 1968 to enable users exchange data and messages. Elementary Terminology of Network

1. Node:
A node is a computer that is attached to a network and is seeking to share the resources of a network. 2. Server:
Server is a computer that facilitates the sharing of data, software and hardware resources on a network. Two types of servers are: A) Non-Dedicated servers
It is a workstation that can double up as server .It is not completely dedicated to the cause of serving. Networks using this server are known as peer-to-peer networks. b) Dedicated server
It is a computer on bigger networks reserved for the cause of serving .Network using this server is known as master-slave network. 3. NIU (Network Interface unit) It is a device which works as an interface and helps the server and the node to share the network resources or it is an interpreter that helps establishing communication between the server and workstation. It is also called as Terminal Access Point (TAP) and Network Interface Card (NIC). III.Switching Techniques

Switches- These are hardware &/or software devices which are used for...
tracking img