Topologies Bus Topology One cable passed throughout entire implementation and to which each unit is connected Network cannot be centrally controlled BUS
Topologies Bus Topology – One cable passed throughout entire implementation and to which each unit is connected. – Network cannot be centrally controlled. BUS
Topologies Token Ring Topology Signals in the network are passing from machine to machi This gives controlled and stable data traffic in the network No central control or configuration of the traffic RING
Topologies Token Ring Topology – Signals in the network are passing from machine to machine. – This gives controlled and stable data traffic in the network. – No central control or configuration of the traffic. RING
Topologies Token Ring Topology EEE802.5:|sols88025 Uses the Baseband Transmission Technique Signal is directly on the transmission medium without modulating a carrier signal Information occupies entire bandwidth in the medium Token format Starting delimiter(one byte) Access control (one bit) Frame control Destination address Source address Routing information Information Field Frame check sequence Ending delimiter Frame status Address Recognized Bit Frame Copied Bit SD AC FC DA SA RI INFO FCSEDFS
Topologies Token Ring Topology – IEEE 802.5; ISO IS 8802-5 – Uses the Baseband Transmission Technique Signal is directly on the transmission medium without modulating a carrier signal. Information occupies entire bandwidth in the medium. – Token format: Starting delimiter (one byte) Access control (one bit) Frame control Destination address Source address Routing information Information Field Frame check sequence Ending delimiter Frame status – Address Recognized Bit – Frame Copied Bit SD AC FC DA SA RI INFO FCS ED FS
Topologies Token Ring Topology 4 Millionbits/s versus 15 Millionbits /second 16 Mbits/s is for large data transfer Each individually attached unit can only work at its speed The lower speed of the individual machine limits the data transfer rate
Topologies Token Ring Topology – 4 Millionbits/s versus 15 Millionbits/second 16 Mbits/s is for large data transfer – Each individually attached unit can only work at its speed The lower speed of the individual machine limits the data transfer rate
Topologies Physical Star, Logical Ring Topology Each cable connection consists of two wires and provides two ways for the signal to pass in the one cable Logical connection in a ring insures stability of the traffic Confiquration management from a central n
Topologies Physical Star, Logical Ring Topology – Each cable connection consists of two wires and provides two ways for the signal to pass in the one cable. – Logical connection in a ring insures stability of the traffic. – Configuration and management from a central place