计算机中数据输入输出的控制方式有多种,"中断"方式的优点不包括()。
A. I/O与CPU并行处理
B. 并行处理多种I/O
C. 实时响应突发事件
D. 批量传送数据
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SpyWare and other fonns of malware afe the biggest online threat to your computer's (1) nowadays. There malicious (2) which get to your PC through freeware, shareware, commercial sites, deceptive pop-ups or in any other way, can record your surfing habits and sites you visit, share your personal information with their partners. Any personal (3), when in wrong hands, can leave you a victim of an"identity theft"by steeling your credit (4) details, birth records and other (5) information. 空白(5)处应选择()
A. public
B. confidential
C. open
D. commercial
彩色视频信号数字化的过程中,利用图像子采样技术通过降低对()的采样频率,以达到减少数据量的目的。
A. 亮度信号
B. 饱和度信号
C. 同步信号
D. 色度信号
下面选项中,()不能实现安全邮件传输。
A. PGP
B. TLS
C. S/MIME
D. SMTP
以太网标准100Base-TX规定的传输介质是()。
A. 3类UTP
B. 5类UTP
C. 6类UTP
D. STP