Week 11

Question 1

The IPv6 header does not have a checksum.

Answer 1

TRUE

Question 2

The transition from IPv4 to IPv6 requires that ____________. (Check all that apply)

Answer 2

IPv4 routers still in use must “tunnel” IPv6 datagrams, by fragmenting/encapsulating them in IPv4 datagrams

Question 3

A protocol designed to control access to a medium is most commonly called a

Answer 3

media access control protocol

Question 4

A MAC address is permanent and unique.

Answer 4

FALSE

Question 5

“Taking Turns” schemes

Answer 5

Token Ring Multiple Access

Token Ring Multiple Access

Question 6

If an Ethernet sender senses a clear channel, and begins transmission, but shortly thereafter detects a collision, it will…

Answer 6

Terminate transmission and enter exponential backoff.

Question 7

The default multiple access scheme of 802.11g is RTS/CTS.

Answer 7

FALSE

Question 8

In direct routing, after the initial contact with the home network, the correspondent sends packets to

Answer 8

The care-of address

Question 9

Which of the following are used in a wireless network such as 802.11n?
Carrier Sense Multiple Access
Collision Avoidance
Exponential back-off/retry for collision resolution
Reservation system with Request to Send (RTS) and Clear to Send (CTS)

Answer 9

TRUE

Question 10

In indirect routing, after the initial contact with the home network, the correspondent sends packets to

Answer 10

The permanent address

Question 11

S represents a source host and D represents a destination host. Which of the following is the most typical use of public key encryption, when S sends an encrypted message to D?

Answer 11

S encrypts a message using D’s public key, and D decrypts the message using D’s private key.