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.

5. Digital Certificates provide:

a. an alternative authentication method when encryption is not desired or available.

b. a way to match the true partys name with their public key.

c. a way to ensure that a senders public key is authentic.

d. a way to exchange symmetric keys in a secure environment.

e. an Electronic receipt for information sent via the Internet.

6. Digital certificates are granted by:

a. independent, unregulated certificate authorities.

b. independent certificate authorities regulated by the IEEE.

c. independent certificate authorities regulated by the United Nations.

d. a Universal Certificate Authority.

e. each nations Universal Certificate Authority.

7. When a router encounters an error in an IP header it:

a. returns the packet to the sending router.

b. returns the packet to the sending router with an error advisement.

c. discards the packet.

d. discards the packet and returns an error advisement.

e. discards the packet, returns an error advisement, and requests a retransmission.

8. Using ______ makes it difficult for hackers trying to discover which IP addresses an organization uses internally.

a. a firewall

b. encryption

c. packet sniffers

d. NAT

e. ATM

9. Ciphertext is a term used to describe:

a. the public key used with encryption.

b. the private key used with encryption.

c. text that will be encrypted.

d. text that has been encrypted.

e. encrypted text that has been compromised and is available to hackers.