LAN
Introduction: History of Ethernet
Ethernet
Ø 1973 : Xerox invents Ethernet (3 Mbps)
Ø 1982: Ethernet Standards b/w vendors (10Mbps)
Ø 1995: Fast Ethernet emerges (100 Mbps)
Ø 2000: Gigabit Ethernet emerges (1000 Mbps)
Ø 2002: 10 Gigabit Ethernet emerges (10000 Mbps)
Ø 2005: 100 Gigabit Ethernet emerges (100000 Mbps)
Ethernet
Distance and Speed: -
CSMA/CD
CSMA/CD is a set of rules governing how you talk on an
Ethernet network
Ø Carrier: - The Network Signal
Ø Sense: - The ability to
detect. (Somebody send/receive the data)
Ø Multiple Access: - All device
has equal access
Ø Collision: - What happens if two
devices send at once.
Ø Detection: - How the computer handle
collision when they happen.
Methods: -
Ø Unicast: - one to one
Ø Broadcast: - One to All
Ø Multicast :- One to many (But not to all)
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