1. Explain advantages of Computer Network ?
- • Speed: The files can be transferred from one Computer to another instantly.
- • Cost: Application software(Network version) can be installed on one Computer and accessed by other Computers on the Network. This makes maintenance and upgrading of software easy.
- • Security: The information on the computer can bemade available only through password.Further some information can be made available only for reading and not copying.
- • Resource sharing: Expensive peripheral devices can be shared by many users in a network.
- • Easy access: Users can access information from any computer that is available on the network. They need go to a specific Computer which may be located in a different building or different location to retrieve information from their account.
2. Explain different types of Computer networks ?
The different types of Computer networks are
The different types of Computer networks are
- • LAN-Local area Network is networking of Computers ia a network in a smaller physical area like a home,office or small group of buildings. The advantage of LAN is high data transfer rate, sharing of resources like printers,files and other applications. The Computers are connected using cables.
- • MAN-A Metropolitan are Network is a network of computers within a city or metropolitan area. It is an extended LAN. They use fibre optic cables for faster data transmission. A MAN supports both data and voice. Cable televisions are examples for MAN.
- • Wide area Network-Wide area Networks connect computers in larger geographical areas . The computers are connected using satellite links, under sea cables or long distance telecommunication links. Security of data is high.It supports remote accessing. Internet services are typical example of WAN
3. Explain Network services ?
- • File Services-All the data files of an organisation are stored in one place and can be shared by many users. Files can be organised and updated systematically.
- • Print Services- When Printers available on the Network , multiple users can print to the same printer. The network printers are usually faster and more capable. They may have accessories such as envelope readers or multiple paper trays
- • Database Services-Multiple users can have access to the database at the same time. The Database software ensures integrity of data and provides multiple access.
- • Message Services-The services include Electronic mail, voice mail, remote access,document transfers across the internet.
- • Application services- several software applications that are developed using network architecture. The applications can be made available to multiple users. Any up gradation made to these applications is also instantly available to the users.
5. Write short notes on Client-Server networking ?
Client -server networks consist of servers and clients. Server is a powerful Computer using advanced network operating system and clients(works tation) access data stored in servers. Server can host e-mail, store common data files and other applications needed by the client. The server also validates any user who tries to login and denies access to network resources as well as client software to unauthorised users. Servers are mainly used for centralised management of data and resources. Advantages
Client -server networks consist of servers and clients. Server is a powerful Computer using advanced network operating system and clients(works tation) access data stored in servers. Server can host e-mail, store common data files and other applications needed by the client. The server also validates any user who tries to login and denies access to network resources as well as client software to unauthorised users. Servers are mainly used for centralised management of data and resources. Advantages
- • Data security and resources are controlled through server.
- • Upgrading and replacement of applications are done as needs increase, without changing the existing formats.
- • Clients can access the server from remote locations.
- • Reduces cost of client’s computer
- • New technologies(object oriented programming)can be integrated easily ,as and when the need arises.
Limitations (Disadvantages)
- • Initial investment may be expensive
- • Maintenance will require staff who must ensure efficient operations
- • If the server breaks down , the operations of client processes may stop.
6. Explain peer-peer networking ?
In a peer-peer network ,there are no dedicated servers. All Computers are equal, and therefore termed as peer-peer. Each Computer functions both as a client and a server. No single Computer holds the control of entire network. The users are located in the same area and security is not an important issue. All the users can access data and programs that reside on all the computers across the network without any restrictions.
Advantages
In a peer-peer network ,there are no dedicated servers. All Computers are equal, and therefore termed as peer-peer. Each Computer functions both as a client and a server. No single Computer holds the control of entire network. The users are located in the same area and security is not an important issue. All the users can access data and programs that reside on all the computers across the network without any restrictions.
Advantages
- • There is no need for dedicated server. Therefore less expensive.
- • A single user operating system such as windows-XP is sufficient Disadvantages(Limitations)
- • There can be no security as all computers can be accessed by all users
- • A failure of a node in peer-peer network means the network can no longer access data or applications on that node.
- • The number of Computers connected are limited to 10 or 12
7. Explain features of Windows operating system ?
Windows operating system is GUI (graphical user interface)based Built in support for multiple users on a single PC Plug and play support for hardware User friendly interface Uses device driver software for easier installation of new hardware and software
Note : to write the features of windows NT(Network operating system) same features can be high lighted. In addition to this the following points may be added.
Windows operating system is GUI (graphical user interface)based Built in support for multiple users on a single PC Plug and play support for hardware User friendly interface Uses device driver software for easier installation of new hardware and software
Note : to write the features of windows NT(Network operating system) same features can be high lighted. In addition to this the following points may be added.
- • Supports client-server applications
- • Management of networks
8. Write functional overview of unix ?
- • More than one user can use the machine at the same time through different terminals
- • More than one program can run at a time(multiprogramming)
- • Multiple tasks can be carried out at the same time like printing, compiling(multitasking)
- • Portability of programs from one computer to another
- • Wide range of support tools are available such as debugging tools,compilers and other software.
- • Hierarchial directory structure for maintenance of directories and files
9. Discuss functional overview of Linux ?
Linux operating system is same as unix. But linux is graphical user interface based system. The functions of linux are
Linux operating system is same as unix. But linux is graphical user interface based system. The functions of linux are
- • More than one user can use the machine at the same time through different terminals
- • More than one progrm can run at a time(multiprogramming)
- • Multiple tasks can be carried out at the same time like printing, compiling(multitasking)
- • Portability of programs from one computer to another
- • Wide range of support tools are available such as debugging tools,compilers and other software.