INTERNET: Internet is a world wide network of interconnected computer networks, in which users can communicate, send/receive information through variety of methods. INTERNET CONNECTION  TYPES: There are  different types of Internet connections, you can choose from: (i) Broadband Cable Connection:  This connection type uses cable modem that works with cable TV. Cable Internet uses the TV channel space for  data-transmission. Typical speeds of  this connection type is 512Kbps to 20Kbps. (ii) Dial Up Connection:  This connection  type uses a modem to connect to Internet.  It is an economical slow, analog connection type that uses normal  telephone line to connect to Internet. Typical speeds of dial-up connections are 2400bps to 56kbps. (iii)Wireless Internet Connection: This connection type uses  radio-frequency  bands for data transfer. It is kind of always-on connection. Various wireless technologies  like Wifi, WiMax etc. are  used for wireless connections. Typical speed ranges are 11

 Network Operating System An operating system is an intermediary between users and computer hardware. It provides users an environment in which a user can execute programs conveniently and efficiently. Network operating system  (NOS) runs on a server and provides server the capability to manage data, users, groups, security, applications, and other networking functions. The primary purpose of the network operating system is to allow shared  file and printer access among multiple computers in a network. Examples of a networking operating systems are Microsoft Windows Server 2008, UNIX, Linux, NetWare etc.  Functions of NOS Monitoring the system and security, so as to provide security against  viruses, hackers, and data corruption. Enabling and managing  access to files on remote systems, and granting access to users. Granting access to remote applications and resources, such as the Internet. Providing access to remote devices such as printers, etc. Providing basic network administration