Ethernet
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Transcript of Ethernet
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ETHERNET
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Ethernet is a family of computer networking technologies for local area networks (LANs).
Introduced in 1980 and standardized in 1985 as IEEE Standard Project 802.3.
Introduction
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Ethernet provides services up to and including the data link layer which is divided into 2 sublayers: LLC & MAC.
Logic Link Control: Provides interconnectivity between different LANs.
Media Access Control: Frames data received from the upper layer & passes to the physical layer.
Physical Layer: It defines transmission of raw bits rather than data packets.
Introduction
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802.3 MAC frame
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Ethernet Evolution
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Standard Ethernet
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10Base5: Max Length=500m, uses bus topology. 10Base2: Max Length is roughly 185m. Very flexible. Uses a bus topology too.
10Base-T : Connected to a hub via 2 twisted cables. Uses a star topology. Max Length=100m.
10Base-F :Connected to a hub via 2 fiber optic cables. Uses a star topology. Max Length=2000m.
Standard Ethernet
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Fast Ethernet
Fast Ethernet
100 BASE-TX 100 BASE-FX 100 BASE-T4
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Intel PRO/100 Fast Ethernet NIC, a PCI card
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The goals of the above are: Upgrade the data rate to 100Mbps. Make it compatible with Standard Ethernet. Keep the same 48-bit address. Keep the same frame format. Keep the same minimum & maximum frame lengths.
Fast Ethernet
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100Base-TX uses 2 Twisted Pair cables.
Good Bandwidth. 100Base-T4 uses 4 pairs of Unshielded Twisted Pair cables. This is cost efficient.
TX
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100Base-FX uses 2 pairs of Fiber optic cables. Higher Bandwidth.
Uses 1300 nm near infrared wavelength Max length
◦ 412 m for half duplex.◦ 2 kms for full duplex.
FX
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Gigabit Ethernet
Gigabit Ethernet Implementations
1000 BASE- SX
1000 base- LX
1000BASE-CX
1000 BASE-T
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The goals of the above are: Upgrade the data rate to 1Gbps. Make it compatible with Standard or Fast Ethernet. Use the same 48-bit address. Use the same frame format. Keep the minimum & maximum frame lengths.
Gigabit Ethernet
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Intel PRO/1000 GT PCI NIC card
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Upgrade the data rate to 10Gbps. Make it compatible with Standard, Fast & Gigabit Ethernet.
Use the same 48-bit address. Use the same frame format. Keep the same minimum & maximum frame lengths.
Ten-Gigabit Ethernet
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Allow the interconnection of existing LANs into a Metropolitan Area Network (MAN) or a Wide Area Network (WAN).
Make Ethernet compatible with technologies like Frame Relay & ATM.
Ten-Gigabit Ethernet
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Ten-Gigabit Ethernet
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Classification:◦ 1. Single mode fiber (SMF)◦ 2. Multi mode Fiber (MMF)
Single mode: Light follows a single path Multi mode: Light follows multiple path leading to
differential mode delay.
Optical fiber
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THANK YOU