An HTML comment starts with ____________ and ends with ____________.

A synchronous password token has to operate at the same pace as the receiver. That is, the token has to advance to the next random number at the same time the receiver advances. Because of clock imprecision, the two units will not always be perfectly together; for example, the token's clock might run 1 second per day slower than the receiver's. Over time, the accumulated difference can be

significant. Suggest a means by which the receiver can detect and compensate for clock drift on the part of the token. What will be an ideal response?

An email account is an electronic mailbox you receive from an ____.

A. ISP B. email service provider C. email client D. email address