28-06-2012, 11:46 AM
LAN Architecture and Protocols
local area network architecture ppt.ppt (Size: 283.5 KB / Downloads: 135)
Personal Computer LANs
Client/server communication
Shared resources
Peer-to-peer communication
Low cost is high priority
High-Speed Office Networks
Increased processing and transfer requirements in many graphics-intensive applications now require significantly higher transfer rates
Decreased cost of storage space leads to program and file bloat, increased need for transfer capacity
Typical office LAN runs at 1-20mbps, high-speed alternatives run at 100+
Factory Networks
High capacity
Ability to handle a variety of data traffic
Large geographic extent
High reliability
Ability to specify and control transmission delays
Tiered LAN Strategies
Bottom-up strategy: individual departments create LANs independently, eventually a backbone brings them together
Top-down strategy: management develops an organization-wide networking plan
Types of Twisted Pair
STP (shielded twisted pair)
the pair is wrapped with metallic foil or braid to insulate the pair from electromagnetic interference
UTP (unshielded twisted pair)
each wire is insulated with plastic wrap, but the pair is encased in an outer covering