This paper compares two major local area network (LAN) technologies — Asynchronous Transfer Mode (ATM) and Ethernet — across six key categories: bandwidth, scalability, overhead, interoperability, management, and price. While ATM offers advantages in quality of service, scalability to wide area networks, and overhead efficiency, Ethernet has largely surpassed it in simplicity, cost-effectiveness, speed upgrades, and ease of deployment. The paper concludes that each technology occupies a distinct role: Ethernet dominates local networking environments, while ATM retains a presence in Internet backbone infrastructure.
Both ATM and Ethernet are prominent LAN systems. ATM (Asynchronous Transfer Mode) appears to offer the ultimate integrated-services network: it provides bandwidth on demand, and supports computer data, voice, and video over a single cost-effective infrastructure, with seamless interconnection between local area and wide area networks.
Ethernet is designed to transmit computer data within local network areas. It does not promise to cater to all telecommunication needs, but it has nonetheless succeeded and even displaced ATM in several respects, becoming dominant in the field. Each major LAN system has its specific merits and drawbacks. This paper compares both technologies across several key categories.
In general terms, ATM is a complex technology, which creates problems in interoperability between public networks and can result in slower service. Ethernet, by contrast, is simpler, containing far fewer of the complex standards required by ATM, and its technology is easy to understand and deploy. This simplicity has largely driven the widespread popularity of Ethernet.
ATM originally offered speeds of 155 Mbps and 622 Mbps, which was the primary reason users were initially attracted to it. Ethernet, however, superseded ATM in this area, ultimately providing superior routing and switching technology alongside greater bandwidth.
"Cell size efficiency and cross-protocol compatibility"
"Installation complexity and cost differences"
It seems clear that Ethernet is superior to ATM in almost all ways, including speed, simplicity, price, interoperability, and management. ATM holds advantages in overhead efficiency and scalability. Nonetheless, ATM still occupies an established position in Internet backbones, where Ethernet cannot currently replace it. Ethernet's primary niche remains within LANs.
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