Advantage and disadvantage of Gigabit Ethernet:
             Gigabit Ethernet is 100 times faster than the original 10Mbps Ethernet and 10 faster than 100Mbps Fast Ethernet. The principle benefits of Gigabit Ethernet include:
             Full-duplex capacity of Gigabit, allowing the effective bandwidth to communicate in both ways simultaneously, therefore it increases the transfer rate. Increasing bandwidth for higher performance and elimination of bottlenecks. Improving the traffic flow in overcrowded area. Transferring large amounts of data across a network quickly. Gigabit Ethernet provides Class of Service (CoS) but it is not guaranteed of bandwidth like Quality of Service (QoS) therefore it does not allow a best support for reliable packet delivery (Eric Hards, 2002). Gigabit Ethernet is suited for server-to-server, switch-to-switch, switch-to-router connections allowed the enterprise to increase network speed easily within the Ethernet networks (Pisciletto, 1997). Gigabit Ethernet also has the advantage of large install base of Ethernet network (Cisco System, 2000a).
             Gigabit is a multi-Gigabit speeds bandwidth using Gigabit server adapters and switches. The availability of the Gigabit Ethernet is fully compatible with old standard Ethernet, Fast Ethernet and Carrier Sense Multiple Access Collision Detection (CSM/CD). Gigabit still maintaining the same MAC protocol, frame format, frame size, full and half duplex. Therefore it maximize existing hardware infrastructure and help to ensue high-bandwidth availability for key systems and also extend the life cycle of the product. Since Gigabit Ethernet can also use the existing cable (CAT-5 copper cable) that works on the existing Ethernet and Fast Ethernet therefore it allows us to overhaul our network infrastructures from the wiring up. Since large installed base of Ethernet and Fast Ethernet already exists therefore Gigabit Ethernet is the best choice of upgrading and maintaining low cost getting high...