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先进的并不总是能够获胜,在社会人文领域如此,在技术领域也同样如此。当初作为广域网技术披提出来的 ATM 技术也曾经在局域网中有一席之地,但现在它仅仅存在于少部分企业的主干网中了,ATM 的主要优势是有很好的服务质量保证,但其缺点是成本较高,管理不方便。ATM 是一种传递模式,在这一模式中,信息被组成固定长度的信元在电信网中进行复用、交换、传输。它综合了电路交换和分组交换的优点,可以传送任意速率的宽带信号,可传输话音、数据、图像和视频业务,其带宽可达155Mbps。但是,在 ATM 被业界看好的同时,快速以太网技术也在迅速发展,以兼容原有网络,升级成本便宜的优势占据了企业网中的主流。ATM,只能哀叹它生不逢时了。
Advanced does not always win, so in the social and cultural fields, and in the technical fields as well. The original ATM technology that was drafted as a WAN technology once also had a place in the LAN, but now it only exists in the backbone of a few enterprises. The main advantage of ATM is that it has a good quality of service guarantee, but its disadvantage is that High cost, inconvenient management. ATM is a transfer mode in which information is multiplexed, exchanged, and transmitted by cells that make up fixed-length cells in a telecommunications network. It combines the benefits of circuit switching and packet switching to deliver wideband signals at any rate and delivers voice, data, video and video services with up to 155Mbps bandwidth. However, ATM is optimistic about the industry at the same time, Fast Ethernet technology is also rapidly developing to compatible with the original network, the advantages of cheap upgrades occupy the mainstream of the enterprise network. ATM, can only lament it was born.