THIS IS A TELECOMMUNICATION NETWORK CLASS.

1. How many keys are used in symmetric key encryption for two-way communication?

a. 0

b. 1

c. 2

d. 4

e. 8

2. How many keys are used in public key encryption for two-way communication?

a. 0

b. 1

c. 2

d. 4

e. 8

3. When a receiver wants to read a message that was sent using public encryption for confidentiality, they must use:

a. the receivers public key.

b. the receivers private key.

c. the same key that the sender used to make the message secret.

d. the senders public key.

e. the senders private key.

4. Which of the following is created by the applicant hashing something?

a. Digital signatures

b. Message digests

c. Both of the above.

d. Neither a nor b.