Which one of the following has been difficult to enforce due to the fact that over 50 percent of all spam originates from servers outside the United States?
A: Spam blocking
B: E-mail filtering
C: Photo identity
D: CAN-SPAM Act
A: Spam blocking
B: E-mail filtering
C: Photo identity
D: CAN-SPAM Act
举一反三
- A more effective approach to controlling spam ha been the development and use of spam blockers, also known as ________. A: spam B: spam filters C: antivirus D: e-mail system
- Which one is not useful in SMS spam control? A: phone numbers B: keywords C: SMS arrival time D: the patterns of SMS spam
- Which one is a challenge of SMS spam control? A: SMS messages always use non-standard words B: There are many SMS messages C: Hard to install anti-SMS spam toolkit in mobile devices D: It is unnecessary to control SMS spam
- What is spam? Spam is _____ email.
- 有以下代码L = ('spam', 'Spam', 'SPAM!')下面那项是不正确的 A: L[2] 'SPAM!' 读取第三个元素 B: L[-2] 'Spam' 反向读取,读取倒数第二个元素 C: L[1:] ('Spam', 'SPAM!') 截取后2个元素 D: L[0:1] ('Spam', ') 截取中间的第2个元素