Final Exercise

Below are 10 questions pertaining to material we studied. Please submit answers to them onto the remote Unix machine using these preparation and submittal instructions. Please name your file "final".

1. Once a tunnel has been created, which command causes packets to use it?
a. sshd
b. ifconfig
c. route
d. ciped-cb

2. The file that houses the private key used by CIPE is
a. identity
b. options
c. cipe.conf
d. none of the above

3. The file named "identity" houses a private key used by
a. IPsec
b. CIPE
c. ppp-over-ssh
d. ip-over-ip
e. all of the above

4. Choose the tunneling protocol that is fundamentally and particularly unlike the other three.
a. IPsec
b. ip-over-ip
c. pppd-over-ssh
d. CIPE

5. The traditional secret-key (1-key) systems' problem that public-key systems eliminate is:
a. the inherent key length limitation from having just one key instead of two
b. the need to share the encryption key
c. while able to to encrypt for confidentiality, the lack of authentication capability without a second key
d. the need to share the decryption key

6. Secret-key (1-key) encryption remains in use despite development of more modern public-key (2-key) technology. That is because secret-key systems are superior to public-key systems in:
a. strength of encryption for a given key length
b. ability to authenticate received data (guarantee it's what was sent)
c. ability to encrypt quickly
d. ability to authenticate the sender (guarantee it's who/where the message says)

7. A digital signature in a message proves the identity of the message's origin because:
a. its decryption with the sender's private key key implies with which public key it was encrypted 
b. its decryption with the sender's public key implies with which private key it was encrypted
c. its decryption with the recipient's private key implies with which public key it was encrypted
d. its decryption with the recipient's public key implies with which private key it was encrypted

8. In IPsec which of the following is not possible:
a. to encrypt data with ESP
b. to authenticate data with ESP
c. to encrypt data with AH
d. to authenticate data with AH

9. In the Simplified-DES encryption algorithm, the two keys are applied
a. in the same order during encryption as decryption
b. in the opposite order during encryption than decryption
c. variable, either order is equivalent for both operations

10. This class  is:
a. more fun than a barrel of monkeys
b. a wrap
c. populated only by geek brainiacs like us
d. none of the above
e. more than one of the above, therefore you have to give credit for this question no matter what