下列预测方法是定性预测方法的是 ()

文中（5 ）处正确的答案是（）。

A．repeaters

B．radars

C．telephones

D．antennas

(72) is a system that can map a name to an address and conversely an address to an name.

(73) is a three-way handshaking authentication protocol that it's packets are encapsulated in the point-to-point protocol

(74) is an approach that enables an ATM Switch to behave like a LAN switch.

(75) is an guided media which is made of glass or plastic and transmits signals in the form. of light.

A．ASK

B．PSK

C．FSK

D．FDM

A．NAT

B．NCP

C．DDN

D．DNS

A．PPP

B．PAP

C．CHAP

D．LCP

A．VLAN

B．LANE

C．VPN

D．IPOA

A．Coaxial cable

B．Optical fiber

C．Unshielded Twisted-pair Cable

D．Shielded Twisted-pair Cable

A．BIOS

B．BASIC

C．DOS

D．FAT

A．CPU的工作频率

B．数据总线的位数

C．地址总线的位数

D．指令的长度

A．计算机都可以直接处理文字、声音和图像

B．为了便于存储和传输，通常需要对声音和图像数据进行压缩

C．信息收集应坚持时效性原则

D．分类、加工和传输都是信息处理所涉及的环节

A．计算机辅助设计

B．计算机辅助制造

C．计算机辅助工程

D．计算机辅助教学