BASIC CONCEPT	ARCHITECTURE	TOPOLOGY
NETWORK TOPOLOGY Network topology refers to the layout of the computers and devices in a communication and devices in a communications network. PHYSICAL TOPOLOGY- The configuration of cables, computers and other peripheral LOGICAL TOPOLOGY- the path that travels between computers on a network    TYPES OF NETWORK TOPOLOGY BUS TOPOLOGY RING TOPOLOGY STAR TOPOLOGY DIAGRAM PHYSICAL TOPOLOGY A bus network consists of a single central cable (backbone/trunk) to which all computers and other devices connect(node). A cable forms a closed loop(ring) with all computers and devices arranged along the ring. All computers and other device on network connect to a central device(hub/switch), thus forming a star. LOGICAL TOPOLOGY In a bus network, it transmit data, instructions and information (the address of the receiving device is included) as a series of signal in both directionwhere all nodes receive the signal but only intended recepient will accept the signal Data transmitted on a ring network travels from device to device around the entire ring, in one direction until it reach its destination by using token In star network, data instructions and informations transfer from one node to another node passes through hub/switch ADVANTAGES Failure of one device usually does not affect the rest of the bus network. Bus networks are inexpensive and easy to install. All computers have equals access to the resources in the network. the uses of token passing enable all devices in ring topology to share the network resources fairly. If one device(pc/printer) fails, only that device is affected. Devices(pc/printer) can be added to or removed from network with little or disruption. DISADVANTAGES The network will be malfunctioned if the single central cable breaks down. A break in the backbone will prevent all systems from accessing the network The network will be malfunctioned if the device(pc/devices) break down. Aring network can span a larger distance than bus network, but it is more difficult to install. The network will be malfunctioned if the hub or switch breaks down Requires more cable than most of the other topologies.