FTP经常被用来传送文件。用户A想通过用户B计算机上的FTP服务器给用户 B传送文件C，而用户B计算机上的FTP服务器设置为匿名登录，则用户A连接用户B的FTP服务器时使用的账号为()。

(75) Virus Security Software is designed to detect, eliminate or quarantine computer viruses before they are able to harm a computer or server networked system.

(75)

Computer hardware engineers research, design, develop, and test computer hardware and supervise its manufacture and(73). Hardware refers to computer(74), circuit boards, computer systems, and related equipment such as keyboards, modems, and printers.

(73)

(71)

The major goal of USB was to define an external expansion bus which makes adding(71) to a PC as easy as hooking up a telephone to a wall-jack. USB 2.0 is an evolution of the USB 1.1(72), providing a higher performance interface.

(70)

(68)

计算机网络中，物理地址是指(37)，在IP地址和物理地址之间建立映射是因为(38)，实现IP地址与物理地址之间映射的协议是(39)。

若FTP地址写为ftp：//123：213@222.18.8.241，则该地址中“123”的含义是FTP服务器的(59)，若FTP地址为ftp：//222．18．8．241，则该地址对应连接的FTP服务器用户名字为(60)。