opic includes Characteristics of Computer Network, Advantages and Disadvantages of Computer Network. TYPES OF NETWORK The Computer network can be categorized into following types LAN, WAN, MAN. CAN, HAN,PAN. NETWORK TOPOLOGY The Graphical arrangement of Computer systems , or nodes to form a computer network, is called the network topology. following are the types of Network Topology: (i)Peer to Peer (ii)Bus Topology (iii)Star Topology (iv)Ring Topology (v)Tree Topology (vi)Mesh Topology (vii)Hybrid Topology COMPUTER NETWORK COMPONENTS Computer network components include the major parts that are needed to install a network both at the office and the home level.These hardware components include cable, Hub, Switch,NIC(Network Interface Card), modem and router. Rest of the topics included in this file are: 1.DATA COMMUNICATION 2.ADVANTAGES AND DISADVANTAGES OF INTERNET 3.INTERNET SERVICES 4.IP ADDRESS 5.COMPUTER VIRUS 6.WEB BROWSER