Post on 17-Dec-2015
transcript
Module CSY3021
Network Planning and Programming
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Network Planning Planning LAN
Planning IP networkAddressing
Interconnection devices VLAN (Virtual LAN)
Planning WAN WAN technologies
Frame Relay, ATM, DSL, Network Security
VPN (Virtual Private Network) Firewall NAT (Network Address Translation)
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Network PlanningPlanning a network can be quite a Herculean task. Planning involves:
Estimating Bandwidth requirements Planning Network reliability Reach and Mobility SecurityConvergence Operating Costs
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Capacity PlanningRaw bandwidth capability is growing rapidly
Bandwidth requirements have moved upLAN
10 Mbps to ~ GbpsWAN:
56Kbps on Modem to Mbps to ~GbpsPlanning LAN cabling requirements
Applications driving bandwidth requirementsUse of Internet as a Business toolvoice communication using Internet (VoIP)Multimedia nature of traffic
Need for wireless bandwidthRD-CSY3021-08/094
Capacity Planning - cont
Wireless bandwidthIncreased mobility of personnel
New emerging wireless standards
Integration with GPRS
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Planning Network ReliabilityNetworks expected to be up and
running round the clockMinimise Downtime
Planned downtime Maintenance, upgrade,
reconfigurationUnplanned downtime
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Minimise Planned downtime Choosing equipment that can be
serviced without disconnecting Hot standby/ redundant
E.g., Server farms Equipment should be capable of
handling multiple protocols and standards. e.g., equipment upgraded from
Ethernet to Fast Ethernet RD-CSY3021-08/097
Planning Reach and Mobility Networks becoming increasing wireless
PAN, LAN, WAN Wired network designed for
Variety of equipment Laptops, PDA, mobile phones
Variety of protocols, speeds, formats
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Planning SecurityApplications carrying more
business critical data Selecting equipment with in-built
security options Mobile users need to access
network from outside Security on Wireless network
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Convergence Design flexible network Handle multitude of available protocols Select core network equipment – Switch,
router and gateways to handle multiple protocols
New wave of Integrated CommunicationsConvergence of application, services and
devicesVoice meets data Wireless meets fixed-line
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Operating CostHigh operating cost for WAN connectivity Operating costs are also a function of
consolidating various WAN services with one service provider versus spreading it across various service providers.
Charges may vary depending on the communication protocol being used. Frame relay, ATM and IP may have different rates
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Network DesignHierarchical network A network with different layers
Each level of the network has it own functionMinimise costs
Avoid spending money to buy unnecessary feature of equipment to each layer requirements Save bandwidth due to modularity of design
Scalability is the major goalFast convergence
Route summarisation
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Typical Network Layout
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TaskGet yourselves in groups and discuss
What is involved in planning a home network?
Prospective solutions ???
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