CHAPTER:-1
OVERVIEW OF COMPUTER NETWORK
COMPUTER NETWORK:- Interconnection of two or more computers and peripherals. Allows user to share and transfer information.
TYPES OF COMPUTER NETWORK
Networks are classified depending on the geographical area covered by the network.
LAN=Local area network
CAN= Campus area network
MAN= Metropolitan area network
WAN= Wide area network
SAN= Storage area network
PAN= Personal area network
LAN(local area network):-
1.Covers a small area.
2.Connects computers and orientations. 3.Covering a local area like office or home.
4.It covers area of 100mtr.
ADVANTAGE OF LAN
Improves productivity due to faster work. Provides easy maintenance. New system can be installed and configured easily.
DISADVANTAGE OF LAN
Limited number of system can only be connected. Can not cover large area. network performance degrades as number of user exceeds.
TYPES OF LAN
LANs are classified depending on the techniques used for data sharing.
Ethernet
Token ring
Token bus
FDDI
Ethernet:- Ethernet is a network protocol that controls how data is transmitted over a LAN technically protocol. The protocol has evolved and improved over time to transfer data at the speed of a GB/sec.
Token ring:- Token ring PAN technology is a communications protocol forLAN. It uses a special three-byte frame called a token that travels around a logical ring of workstation or servers.
TOKEN BUS:- A token bus network is much like a token-ring network expect that he ends of the network do not meet to from the ring. Instead the network is still terminated at both ends.
FDDI- It is stand for FIBER DISTRIBUTED DATA INTERFACE is a set of ANSI and ISO standards for data transmission in FIBER optic lines in a LAN that can extand in range up to 200km.
CAN(campus area network):- Made up of multiple LANs shin in limited area. Connects different LANs in a campus. It ranges of 1 to 5km.
MAN(Metropolitan area network):- Interconnects networks with in a city. Supports data and voice transmission. It ranges of 5 to 50km.
WAN(wide area network):- Covers a wide geographical area which includes multiple computers or LANs. It ranges all of the world.
CLIENT/SERVER CONFIGURATION
Clients of two elements----client and server
1.CLIENT:- Manages local resources uses by users such as monitor,keyboard,CPU and peripherals.
2.SERVER:- A centralised element which provides resources to client. Manages data,printers or network traffice.
INTERNETWORK
1.INTERNET:- Internet is a worldwide publicly accessible computer network of interconnected computer network (INTERNETWORK) that transmit data using the standard internet protocol (IP) largest INTERNETWORK in the world is INTERNET.
2.INTRANET:- An intranet is a privet network that is contained within an enterprise. typical intranet for a business organisation consists of many interlinked LAN. The content available inside intranet are intended only for the members of that organisation (USEALLY EMPLOYEES OF A COMPANY).
3.EXTRANET:- An extranet can be viewed as part of a company's intranet that is extended to users outside the company like suppliers,vendors,partners,constomer or other business associates.
WORKGROUP
All computers are peers no computer has control over another computer. Each computer has a set of user account to use any computer in the workgroup you must have an account on that computer. There are typically no more than 10 to 20 computers. All computers must be on the same local network or subnet.
DOMAIN
One are more computers are servers network administrators use server to control the security and permissions of all computers on the domain. This make it easy to make changes because the changes are automatically made to all computers. It you have a user account on the domain you can log on to any computer on the domain without needing an account on that computer. There can be hundreds of thousands of computers. The computers can be on different local networks.
NETWORK SERVER
A network server is a computer system, which is used as the central repository of data and various programs that are shared by users in a network.
1.FILE SERVER:- File server (FILESERVER) is a computer attached to a network that provides a location for shared disk access,i.e. storage computer files (such as text,image,sound,vedio) that can be accessed by the workstations that are able to reach the computer that shares the access through a computer.
2.PRINT SERVER:- A print server is a computer that can process print related jobs on a network of computers. print servers are connected to a computer network in order to serve the need for printing jobs in a network that may contain more than on printer.
3.WEB SERVER:- A Web server is a computer that runs websites. The basic objective of the web server is to store, process and deliver web pages to the users.
4.STORAGE SERVER:- A type of server that is used to store, secure, manage and access digital data and files is known as storage server.
5.FAX SERVER:- A fax SERVER is a system capable of receiving incoming taxes, sending taxes and distributing taxes over a computer network.
6.DATABASE SERVER:- A database server is a server which uses a database application that provides database services to other computer programs or to computers.
OVERVIEW OF COMPUTER NETWORK
COMPUTER NETWORK:- Interconnection of two or more computers and peripherals. Allows user to share and transfer information.
TYPES OF COMPUTER NETWORK
Networks are classified depending on the geographical area covered by the network.
LAN=Local area network
CAN= Campus area network
MAN= Metropolitan area network
WAN= Wide area network
SAN= Storage area network
PAN= Personal area network
LAN(local area network):-
1.Covers a small area.
2.Connects computers and orientations. 3.Covering a local area like office or home.
4.It covers area of 100mtr.
ADVANTAGE OF LAN
Improves productivity due to faster work. Provides easy maintenance. New system can be installed and configured easily.
DISADVANTAGE OF LAN
Limited number of system can only be connected. Can not cover large area. network performance degrades as number of user exceeds.
TYPES OF LAN
LANs are classified depending on the techniques used for data sharing.
Ethernet
Token ring
Token bus
FDDI
Ethernet:- Ethernet is a network protocol that controls how data is transmitted over a LAN technically protocol. The protocol has evolved and improved over time to transfer data at the speed of a GB/sec.
Token ring:- Token ring PAN technology is a communications protocol forLAN. It uses a special three-byte frame called a token that travels around a logical ring of workstation or servers.
TOKEN BUS:- A token bus network is much like a token-ring network expect that he ends of the network do not meet to from the ring. Instead the network is still terminated at both ends.
FDDI- It is stand for FIBER DISTRIBUTED DATA INTERFACE is a set of ANSI and ISO standards for data transmission in FIBER optic lines in a LAN that can extand in range up to 200km.
CAN(campus area network):- Made up of multiple LANs shin in limited area. Connects different LANs in a campus. It ranges of 1 to 5km.
MAN(Metropolitan area network):- Interconnects networks with in a city. Supports data and voice transmission. It ranges of 5 to 50km.
WAN(wide area network):- Covers a wide geographical area which includes multiple computers or LANs. It ranges all of the world.
CLIENT/SERVER CONFIGURATION
Clients of two elements----client and server
1.CLIENT:- Manages local resources uses by users such as monitor,keyboard,CPU and peripherals.
2.SERVER:- A centralised element which provides resources to client. Manages data,printers or network traffice.
INTERNETWORK
1.INTERNET:- Internet is a worldwide publicly accessible computer network of interconnected computer network (INTERNETWORK) that transmit data using the standard internet protocol (IP) largest INTERNETWORK in the world is INTERNET.
2.INTRANET:- An intranet is a privet network that is contained within an enterprise. typical intranet for a business organisation consists of many interlinked LAN. The content available inside intranet are intended only for the members of that organisation (USEALLY EMPLOYEES OF A COMPANY).
3.EXTRANET:- An extranet can be viewed as part of a company's intranet that is extended to users outside the company like suppliers,vendors,partners,constomer or other business associates.
WORKGROUP
All computers are peers no computer has control over another computer. Each computer has a set of user account to use any computer in the workgroup you must have an account on that computer. There are typically no more than 10 to 20 computers. All computers must be on the same local network or subnet.
DOMAIN
One are more computers are servers network administrators use server to control the security and permissions of all computers on the domain. This make it easy to make changes because the changes are automatically made to all computers. It you have a user account on the domain you can log on to any computer on the domain without needing an account on that computer. There can be hundreds of thousands of computers. The computers can be on different local networks.
NETWORK SERVER
A network server is a computer system, which is used as the central repository of data and various programs that are shared by users in a network.
1.FILE SERVER:- File server (FILESERVER) is a computer attached to a network that provides a location for shared disk access,i.e. storage computer files (such as text,image,sound,vedio) that can be accessed by the workstations that are able to reach the computer that shares the access through a computer.
2.PRINT SERVER:- A print server is a computer that can process print related jobs on a network of computers. print servers are connected to a computer network in order to serve the need for printing jobs in a network that may contain more than on printer.
3.WEB SERVER:- A Web server is a computer that runs websites. The basic objective of the web server is to store, process and deliver web pages to the users.
4.STORAGE SERVER:- A type of server that is used to store, secure, manage and access digital data and files is known as storage server.
5.FAX SERVER:- A fax SERVER is a system capable of receiving incoming taxes, sending taxes and distributing taxes over a computer network.
6.DATABASE SERVER:- A database server is a server which uses a database application that provides database services to other computer programs or to computers.
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