a. If a message sender uses SSL/TLS when it sends a message, how is protection likely to be limited?

16a.) When an e-mail user encrypts an outgoing message with  SSL/TLS, how far will this encryption extend?

a. To the sender's e-mail server

b. To the receiver's e-mail server

c. To the receiver's client host

d. To an application program on the receiver's client host

d. Distinguish between link encryption and end- to-end encryption for confidentiality.

16b.) In e-mail, SSL/TLS provides _________.

a. Link encryption

b. End-to-end encryption

c. Both A and B

d. Neither A nor B

c. Why is link-by-link encryption for confidentiality not fully secure even if there is encryption for confidentiality in all links along the way?

16c.) Why is link-by-link encryption for confidentiality not fully secure even if there is encryption for confidentiality in all links along the way?

a. There cannot be confidentiality on each link.

b. Devices along the way may not be secure.

c. Both A and B

d. Neither A nor B

d. What is the remedy for the limitations of link-by-link encryption?

16d.) Which of the following provides end-to-end encryption?

a. SSL/TLS

b. S/MIME

c. Both A and B

d. Neither A nor B

e. Why is end-to-end encryption uncommon?

16e.) What is the almost universal standard for end-to-end encryption?

a. SSL/TLS

b. IP sec

c. S/MIME

e. There is no almost universal standard for end-to-end encryption.