Types of Networks

1)    Local Area Network (LAN): Systems connected within the same geographical area is called LAN. A LAN can span 2 kilometers.

Components of LAN:

1.    .NIC (Network Interface Card)

2.    Cable – Co axial, cat5 or cat6

3.    Hubs or Switches.

2)    Metropolitan Area Networking: MAN is a combination of LANs or WANS located and connected within the same city.

Components of MAN:

1. Router

2. Brouter (Brouter is a combination of bridge or router)

3. ATM Switches

4. DSL connectivity (DSL – Digital Subscriber Link) ex: Star cables

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     3) Wide Area Networking (WAN): Interconnection of LANs or MANs located within the same geographical area or different area it depends on telecommunication services.

Components of WAN: Same as MAN:

Fiber Optic cable....

A technology that uses glass (or plastic) threads (fibers) to transmit data. A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves.

A fiber optic cable is a network cable that contains strands of glass fibers inside an insulated casing.

What is Domain Controller?

A domain controller (DC) or network domain controller is a Windows-based computer system that is used for storing user account data in a central database. It is the centrepiece of the Windows Active Directory service that authenticates users, stores user account information and enforces security policy for a Windows domain.

A domain controller allows system administrators to grant or deny users access to system resources, such as printers, documents, folders, network locations, etc., via a single username and password.