There are _______ types of hypervisors, distinguished by whether there is another operating system between the hypervisor and the host.

A(n) ____________________ loop is a loop placed completely inside another loop.

Fill in the blank(s) with the appropriate word(s).

Which of the following statements about symmetric key cryptography is not true?

A) Symmetric key cryptography uses one shared key. B) Symmetric algorithms can provide confidentiality. C) Symmetric algorithms can provide nonrepudiation and authenticity. D) Symmetric key cryptography uses a single secret key.