A communications network is two or more computers connected to share data and resources are “networked.”
The simple idea behind computer networking is to allow users to access more information and give them access to devices not directly attached to their “local” system, such as printers or storage devices.
Network connections can also be made using RADIO transmission – Wireless.
Allows user to stay connected to their home/office network using portable PC or PDA or may be Cell phone.
Two Technologies that use wireless networking – Bluetooth (for home or small office use) and wireless Ethernet.
Local Area Networks- 3 basic topologies
These are either the logical or physical way the computers
Each connection on the network is known as a node .
These topologies are:
Mesh [ Partially connected, Fully connected ]
A Star topology connects all the nodes directly to the server or to a connecting device such as a hub .
All nodes on a Bus topology are connected to a central line or backbone.
Nodes on a Ring topology are connected in a closed loop. This means that each node has two connections, one in and another out. Using this type of topology the data must travel through all the nodes.