投资具有积极的作用,投机具有消极的作用。 ()
A. 正确
B. 错误
ATM是一种面向连接的快速分组交换技术,它采用虚拟通道模式,通道标识基于的标识符是
A. (N)PDU和(N)IDU
B. VPI和VCI
CONNECT.reguest和CONNECT.indication
D. (N)SAP和(N+1)SAP
Which of the following statements is true regarding simple sort techniques?
A. Exchange sort is frequently referred to as a bubble sort.
B. Exchange sort is the least expensive.
C. If random data are in an array that is to be sorted, an Insertion Sort will give the best performance for large elements with small sort items.
D. Both Insertion Sort and Selection Sort require O(n)moves.
在OSI参考模型中,两个(N)成实体之间交换的数据单元称之为(N)协议数据单元, 记做(N)PDU。(N)PDU由两部分组成:(N)PCI与
A. (N+1)IDU
B. (N+1)SDU
C. (N)SDU
D. (N)IDU