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In a data communications environment, the network can range in scope from a token-ring LAN to an X.25 or Frame Relay WAN. Thus, although some features are common to both LAN and WAN environments, there is also some variability. In general, a data communications network transports data by using variable-length packets. Although many WAN protocols are connection-oriented, some are connectionless. Similarly, many LAN protocols are connectionless, whereas others are connection-oriented. Because data communications networks were designed to transport files, records, and screens of data, transmission delay or latency, if small, does not adversely affect users. In comparison, in a telecommunications network, a similar amount of latency that is acceptable on a data network could wreak havoc with a telephone conversation. Recognizing the differences among voice, video, and data transportation, ATM was designed to adapt to the time sensitivity of different applications. It includes different classes of service that enable the technology to match delivery to the time sensitivity of the information it transports.更多精彩文章及讨论,请光临枫下论坛 rolia.net
In a data communications environment, the network can range in scope from a token-ring LAN to an X.25 or Frame Relay WAN. Thus, although some features are common to both LAN and WAN environments, there is also some variability. In general, a data communications network transports data by using variable-length packets. Although many WAN protocols are connection-oriented, some are connectionless. Similarly, many LAN protocols are connectionless, whereas others are connection-oriented. Because data communications networks were designed to transport files, records, and screens of data, transmission delay or latency, if small, does not adversely affect users. In comparison, in a telecommunications network, a similar amount of latency that is acceptable on a data network could wreak havoc with a telephone conversation. Recognizing the differences among voice, video, and data transportation, ATM was designed to adapt to the time sensitivity of different applications. It includes different classes of service that enable the technology to match delivery to the time sensitivity of the information it transports.更多精彩文章及讨论,请光临枫下论坛 rolia.net