CT1303 LAN LECTURE 15.

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Presentation transcript:

CT1303 LAN LECTURE 15

IEEE LAN standards Ethernet LAN (by Xerox): Topology: Bus Transmission Media: Thick Coaxial Cable. Signal: Digital. Encoding Technique: Manchester. Devices used: Transceiver: To manage the access to the channel Has MAC protocols (CSMA/CD) External device ( out of the PC) Connect the coaxial cable.

Ethernet LAN Transceiver Cable: Controller: DB-15 connector ( similar to AUI). Maximum length 50 m Consists of 5 pairs of UTP; 2 pairs for sending and receiving data, 2 pairs for controlling the data, 1 for voltage and electricity. Controller: To send controlling commands Has Logical Link Control LLC protocol mechanism. It is inside PC.

Ethernet LAN

10 Base 5 standards Maximum network length: 500 m Transmission media: Thick Coaxial RG-8 Topology: bus Signal: digital, Manchester encoding Devices used: Medium Attached Unit MAU ~ Transceiver Attached Unit Interface AUI ~ Transceiver Cable Network Interface Card NIC:LLC protocols mechanisms , inside PCs

10 Base 2 standards Transceiver or MAU is embedded into NIC to control and connecting to channel. Transmission media: thin Coaxial RG-58 Network length: 185m , repeaters can be used to extend network length. Topology: bus Signal: digital, Manchester encoding. Devices used: cables, BNC-T , BNC connectors, NICs

10 Base 2 standards

10 Broad 36 standards Signal: analog NRZ encoding. Topology: bus, tree Network length: 1800 m, 3600m with repeaters. 100 devices can be connected in 1 cable Pair of cables: sending, receiving cable, or 1 cable and dividing frequency bandwidth to sending and receiving parts. TV. Cables can be used. Network can be used for T.V broadcast + LAN devices: used: Head End: in top of network to transmit signals from sending cable to receiving cable Modems: module signals . NIC: CSMA/CD

10 Broad 36 standards

10 Base T standards 2 pairs of UTP- CAT3 100 m without repeaters. Hub used to connect devices. Star topology RG-45 Hub can have AUI,BNC ports for coaxial cables. Signal: digital, Manchester encoding. Maximum hubs can be used to connect 2 PCs are 4 hubs + 5 cables.

10 Base T standards NIC is inside devices; RG-45 ports. Twisted pair cables. NIC is responsible for sensing + transmission + collision detection.