Blog: CS610 Assignment Solution

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 Standards	Ethernet Name	Data Rate	Cable Used
10BaseT	Twisted pair Ethernet	10 Mbps	Category 5
100BaseT	Fast Ethernet	100 Mbps	Category 5E
1000BaseT	Gigabit Ethernet	1 Gbps	Category 6

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

Technologies	Access method used
Wireless LAN	CSMA/CA - Carrier Sense Multiple Access with Collision Avoidance
Ethernet	CSMA/CD: Carrier Sense Multiple Access / Collision Detection
Ring networks	Token Passing
ALOHA-net	CSMA/CD , CSMA/CA , DOCSIS
Requirements	The best cable to be used
For Secure and fast delivery	Fiber Optic
To make a network of 15 PC’s with low budget	UTP - Unshielded Twisted Pair
For cable TV network	Coaxial Cable
Requirements	The best topology
If using Central hub	Star Topology
Provide more security	Mesh 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 network	Ring Topology