An interconnection of two or more computers is called a network. There are several types of networks including local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). LANs connect computers within a distinct geographic area like an office. MANs span an entire city or campus by connecting multiple LANs. WANs extend over large geographical distances often using leased telecommunication circuits.

1. NETWORK

2. NETWORK
• INTERCONNECTION OF TWO OR MORE COMPUTERS ARE
CALLED NETWORK

3. TYPES OF NETWORK
• LAN - LOCAL AREA NETWORK
• MAN – METROPOLITAN AREA NETWORK
• WAN – WIDE AREA NETWORK

4. LAN• A LOCAL AREA NETWORK (LAN) IS A GROUP OF COMPUTERS
AND ASSOCIATED DEVICES THAT SHARE A COMMON
COMMUNICATIONS LINE OR WIRELESS LINK TO A SERVER.
TYPICALLY, A LAN ENCOMPASSES COMPUTERS AND
PERIPHERALS CONNECTED TO A SERVER WITHIN A DISTINCT
GEOGRAPHIC AREA SUCH AS AN OFFICE OR A COMMERCIAL
ESTABLISHMENT.

5. MAN
• A METROPOLITAN AREA NETWORK (MAN) IS SIMILAR TO A
LOCAL AREA NETWORK (LAN) BUT SPANS AN ENTIRE CITY OR
CAMPUS. MANS ARE FORMED BY CONNECTING MULTIPLE LANS.
THUS, MANS ARE LARGER THAN LANS BUT SMALLER THAN
WIDE AREA NETWORKS (WAN).

6. WAN
• A WIDE AREA NETWORK (WAN) IS A TELECOMMUNICATIONS
NETWORK OR COMPUTER NETWORK THAT EXTENDS OVER A
LARGE GEOGRAPHICAL DISTANCE. WIDE AREA NETWORKS ARE
OFTEN ESTABLISHED WITH LEASED TELECOMMUNICATION
CIRCUITS.

7. INTERNET
• THE INTERNET IS THE GLOBAL SYSTEM OF INTERCONNECTED
COMPUTER NETWORKS THAT USE THE INTERNET PROTOCOL
SUITE (TCP/IP) TO LINK DEVICES WORLDWIDE.
• NETWORKS OF NETWORK IS CALLED INTERNET

8. FACILITIES OF INTERNET