Thursday, September 3, 2009

Windows NT Networks

In the summer of 1993 Microsoft released their new Network Operating System, NT for workstations. The NT server followed in the autumn of 1994. The network protocols used in NT are NetBEUI, TCP/IP, IPX and AppleTalk, which gives NT the opportunity to communicate with different types of network platforms. Windows NT is a multisession operating system. NT can run on different types of processors like Intel, Alpha and PowerPC. NT has also a good support for remote dial-in communication, called RAS (Remote Access Service).

NT is normally used on top of Ethernet, but it is also possible to use in Token Ring.

Novell Netware


Novell Netware has for a long time been a market leader of NOS. Netware has been on the market since 1983 and it runs only on Intel processors.

Novell developed NetWare, which is a powerful multisession system. This means that NetWare can handle different parallel sessions as previously only found in larger types of computers.

NetWare is sold in many versions corresponding to the number of users, types of connections and level of security.

The client could be a personal computer with or without its own hard disc and with an operating system such as MS-DOS, OS/2, MacOS or UNIX.

Netware handles both IPX and TCP/IP traffic over Ethernet or Token Ring.

Network operating systems


After the physical network the NOS, Network Operating System, is the most important part in a PC network. The network operating system is responsible for the levels 3 to 7 in the OSI model. This means that NOS is independent of the type of network. It works in the same manner on an Ethernet as a Token Ring.

There are two types of NOS. The first type is called "peer to peer” which means that no dedicated server is needed. The other type is server based and is used for larger, more demanding networks.

There are many vendors with their own types of NOS on the market.

The leading systems for "peer to peer” based NOS are NetWare Lite and Windows for Workgroups.

The leading systems for server based NOS are Novell NetWare, Windows NT and OS/2 LAN Server.

Networks Shared

One of the main reasons for using local networks is to share common resources, such as printers, files, e-mail and devices for communication.

In the picture you see a shared printer and a file server which is used to share files. Routers and gateways are used for communication to other LANs and remote devices such as computers and faxes.

Networks Components


A PC network is used to share resources such as files and printers. A PC network is normally based on Ethernet or Token Ring and consists of a number of components:


  1. Cabling is used to physically connect the components together. A common type of cable used in both Ethernet and Token Ring is twisted pair.
  2. Clients such as PCs or Macintoshes can be used together on the same network. One often distinguishes between the hardware and the software components of a client. One important hardware component is the NIC, which stands for Network Interface Card, inside the client. The software component responsible for communication consists of two parts: the operating system and communication software. These two together are called Network Operating System. An example of a Network Operating System on a client is DOS and IPX software.
  3. Servers are used to share documents and programs. Servers are often dedicated powerful computers. There are different types of Network Operating Systems for a server. Examples are Novell Netware, Windows NT and IBM LANServer.
  4. Printers are common components found in a PC network.
  5. Gateways, not seen in this picture, are used to translate between two applications or protocols. Gateways are used for communication between different protocols.

Tag

Assignment Lanka Tag Cloud
Computer Networks The History of Local Area Networks, LAN, The Topologies of a Networks, LANs describe different types of transmission Medias, Local Area Networks Access Methods, Carrier Sense Multiple Access with Collision Detect, Development of LAN Technologies. LAN -Token Ring, LAN Ethernet Digital, LAN - Ethernet Sun microsystems, LAN - Ethernet Mixed Environment, LAN - Token Ring was introduced by IBM LAN - IBM implementation of Token Ring, Token Ring Novell, LAN Token Ring - in a mixed environment, LAN - Fiber Distributed Data Interface, LAN - ATM, LAN Components, LAN Switching Methods, Virtual Local Area Network, Port based VLAN, Mac based VLAN, Protocol based VLAN, User Base VLAN, PC networks Components, PC networks Shared resources, PC Network operating systems, PC networks Novell Netware, PC networks Windows NT, PC networks IBM LAN Server Computer Programming Languages HTML Language, The Generations of Programming Languages, Different types of High Level Languages, Different types of High Level Languages Disadvantages
Computer Networks - IBM LAN Server, Windows NT Networks, Novell Netware, Network operating systems, Networks Shared, Networks Components, User Base, Protocol based, Mac based, Port based, VLAN, LAN Switching, LAN Components, ATM, Fiber Data, Token Ring, Token Ring Novell, IBM implementation, Ethernet, Sun microsystems, Ethernet Digital, Token passing, LAN Technologies, CSMA/CD, Access Methods, Transmission, Networks, The History of Local Area Networks, LAN