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CS610 Assignment Solution

Saturday, November 24, 2012 Edit This


The first commercial application of ALOHA channels was launched in 1976 by Comsat General in the Marisat maritime satellite communications system. At about the same time Metcalfe working with a group from DEC, Intel and Xerox (the DIX Group) formulated an open Ethernet standard based on the Alto ALOHA network. Since 1983 ALOHA channels have been adopted for use in all major mobile telephone standards (1G, 2G and 3G) as the control channel and then for a variety of packet data channels integrated into these voice networks (e.g. GPRS and UMTS). ALOHA has also been adopted for use in a variety of protocols used in wired networks, CSMA/CD and CSMA/CA in single channel local area networks and DOCSIS for commercial cable networks.

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Question 1 [5 Marks]
For each Ethernet standard given in the table write each name/value against the titles of the next three columns. 

Ethernet StandardsEthernet NameData RateCable Used
10BaseTTwisted pair Ethernet10 MbpsCategory 5
100BaseTFast Ethernet100 MbpsCategory 5E
1000BaseTGigabit Ethernet1 GbpsCategory 6

Question 2 [10 Marks]
Write appropriate answer against each technology/requirement.

TechnologiesAccess method used
Wireless LANCSMA/CA - Carrier Sense Multiple Access with Collision Avoidance
EthernetCSMA/CD: Carrier Sense Multiple Access / Collision Detection
Ring networksToken Passing
ALOHA-netCSMA/CD , CSMA/CA , DOCSIS
RequirementsThe best cable to be used
For Secure and fast deliveryFiber Optic
To make a network of 15 PC’s with low budgetUTP - Unshielded Twisted Pair
For cable TV networkCoaxial Cable
RequirementsThe best topology
If using Central hubStar Topology
Provide more securityMesh topology is the most secure topology because in mesh topology each device has a dedicated link to others .
If one system disconnect will disturb all networkRing Topology

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