COMPUTER PLATFORMS

1
COMPUTER PLATFORMS
Building Planning Computer Networks Week 8
2
NO LECTURE WEDNESDAY(19th Nov. 2003)
Use the time to work on your assignments and do
some background reading about networks
3
Week 8

• Basic LAN Networks
• 10 Base 2
• 10 Base 5
• 10/100 Base T
• 1000 Base T
• Token Ring
• Planning Network
• Factors affecting planning
• Building the Network
• Responding to requirements

4
10 Base 2

• thinnet or cheapernet
• Bus Topology
• Co-axial cable (RG-58) (5mm thick)
• BNC Connectors
• Network Interface Card (NIC) and T-Piece
• 50 Ohm Terminators
• 10 Mbps (Megabits per second) Data Rate
• 30 connections - maximum on one piece of coaxial
  cable
• 185 meters - maximum distance between connections

5
10 Base 5

• thicknet
• Bus Topology
• Co-axial cable (10mm thick)
• 50 Ohm Terminators
• vampire taps
• 10 Mbps (Megabits per second) Data Rate
• 100 connections (taps) - maximum on one piece of
  coaxial cable
• 500 meters - maximum distance between connections

6
10 / 100 Base T

• Star Topology
• Uses Network Interface Card (NIC)
• Uses UTP (Unshielded Twisted Pair) Cables
• Category 3 or better
• Uses hubs to interconnect multiple nodes
• 10 / 100 Mbps Data Rate
• Uses RJ-45 modular connectors (plugs and sockets)
• 100 meters - maximum distance between connections

7
1000 Base T

• Star Topology
• Uses category 5 or better UTP cable
• 1000 Mbps (Megabits per second) / 1 Gbps
  (Gigabits per second) Data Rate
• Hubs / switches
• Otherwise the same as 100 Base T

8
Token Ring

• First developed by IBM (International Business
  Machines)
• Uses UTP, STP (Shielded Twisted Pair), or fibre
  cables
• Number of maximum connections and distance of
  cable depends on the equipment being used
• PHYSICAL Star - LOGICAL ring topology
• MAU (Multi-station Access Unit) acts as a hub
• Need special NIC to connect to MAU
• Still in use, but becoming an old technology

9
Planning the network

• What will network be used for?
• Bandwidth
• Security issues
• Reliability
• Traffic issues
• Interconnection
• How many users/nodes?
• Topology
• Bandwidth
• Traffic issues
• Compatibility issues
• Client / Server or Peer-to-peer
• Administration
• Physical requirements / constraints

10
Planning the network

• Expansion / future proofing
• Scalability
• Interconnection
• Bandwidth
• Number of users supported
• Centralised control / administration
• Installation / maintenance
• Costs
• Reliability
• Physical restrictions / considerations
• Any special requirements?

11
Building the network

• To be effective network must meet needs
• Obvious, but the network is useless if it doesnt
  do what it was intended to do
• Total cost should not exceed savings
• Price of installation should not be greater than
  the amount of money the network will save the
  organisation
• Analyse options available
• Topology
• Bandwidth
• Number of users supported
• Client / Server
• Peer-to-peer
• Media
• Security

12
Week 8 What u know?

• Basic LAN Networks
• 10 Base 2
• 10 Base 5
• 10/100 base T
• 1000 Base T
• Token Ring
• Planning Network
• Factors affecting planning
• Building the Network
• Responding to requirements