正确答案: B

物理层和数据链路层

题目：ATM的物理层功能相当于OSI/RM中的（ ）

解析：B

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举一反三的答案和解析：

[单选题]信息安全的基本属性是()。

A，B，C都是

解析：答案：D

[单选题]The(66)is a channel's capacity which directly reflects the data transfer rate of the channel.(67)functions in a NetWare network which is used to define addressing schemes.

bandwidth

解析：解析：带宽(bandwidth)是指一个信道的容量，它直接反映数字在信道中传榆的速率。

[单选题]The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of use-cases and (71) have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions-time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (72) which is concluded with a well-defined (73) and can be further broken down into (74) - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (75) logically by nature.

scenarios