Thursday, June 7, 2007

Question 65

Which of the following is suitable as a description of an ATM switch?

a) A general term for private branch exchanges used to interconnect extension telephones installed on premises in a limited area such as an office, or to connect subscriber telephone lines with extension telephones.
b) A switch that partitions data into fixed-length blocks called cells, and attaches headers containing address information to each cell in order to handle various types of data in an integrated manner.
c) A storage-type switch that segments data into blocked units before transfer. The switching processing is realized by software processing, so the transmission speed is limited to approximately several dozen Kbps.
d) An ATM switch switches data that has been segmented into units called frames. The switch does not re-transmit data for transmission errors, so it is possible to increase processing speed within the network.

answer

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