Chapter 6

Question 1

What is synchronous communications?

Answer 1

Instant messaging, when sent. Phone and SMS

Question 2

What is asynchronous communication?

Answer 2

Delayed message, such as post mail

Question 3

Simplex Channel?

Answer 3

Transmit Data is only one direction (doorbells, radio)

Question 4

Half-duplex Channel?

Answer 4

Transmit data in any direction, but holds priority (PC to remote)

Question 5

Full-Duplux Channel?

Answer 5

Transmits data in both directions at the same time (two simplex channels)

Question 6

What are examples of guided media transmissions?

Answer 6

Twisted-Pair, Coaxial, Fibre Optic

Question 7

What is WiMAX?

Answer 7

Worldwide Interoperability for Microwave Access. It operates like WiFi but longer distances, with less towers.

Question 8

What is a network node?

Answer 8

The computers and devices connected to a network

Question 9

What is a client/service architecture?

Answer 9

Multiple platforms used to create one network optimized for business

Question 10

Adavnatges to a client/service?

Answer 10

Minimize traffic, lower migration costs, direct security measures

Question 11

Disadvantages to client/service?

Answer 11

2-5 yr process, Multi-vendor problem arrises, controlling virus and privacy difficult

Question 12

What is a multiplexer?

Answer 12

Device that combines data from multiple sources, often saving telecom costs. Used in LD Calls

Question 13

What is PBX?

Answer 13

Private Branch Exchange allows line sharing within firm and lowers telecom costs

Question 14

What is WEP and WPA?

Answer 14

Wired Equivalent Privacy uses 128-bit key. Wi-Fi Protected Access is better than WEP.

Question 15

What is AES?

Answer 15

An extremely strong data encryption standard and most relevant for today

Question 16

What is EDI?

Answer 16

Electronic Data Interchange is an inter company application to application system.