Domain 4-Communication and Network Security

Question 1

Simplex communication

Answer 1

is one-way, like a car radio tuned to a music station

Question 2

Half-duplex communication

Answer 2

sends or receives at one time only (not simultaneously), like a walkie-talkie.

Question 3

Baseband networks

Answer 3

networks have one channel, and can only send one signal at a time

Question 4

Broadband networks

Answer 4

have multiple channels and can send multiple signals at a time, like cable TV

Question 5

Circuit-switched networks

Answer 5

an provide dedicated bandwidth to point-to-point connections, such as a T1 connecting two offices

Question 6

Packet-switched networks

Answer 6

were designed to address this issue, as well as handle network failures more robustly

Question 7

The Session Layer uses

Answer 7

simplex, half-duplex, and full-duplex communication.

Question 8

de-multiplexing

Answer 8

The reverse of encapsulation

Question 9

DNSSEC

Answer 9

provides authentication and integrity to DNS responses via the use of public key encryption.