Chapter 5: Summary book

Question 1

What is the networking revolution

Answer 1

The networking revolution has completely changed how the computer is used. Today, no one would imagine using a computer that was not connected to one or more networks. During the 1980’s many organisations began combining their once-separate telecommunications and information-systems departments into an information technology (IT) department.

Question 2

What is circuit switching

Answer 2

Circuit switching = requires a dedicated communication path for duration of transmission. It wastes bandwidth, but minimizes delays.

Question 3

What is packet switching

Answer 3

Packet switching = specialized message switching, with very little delay.

Question 4

How is a broadband connection accomplischd

Answer 4

A broadband connection is accomplished via the cable television lines or phone lines (DSL) and has a speed of at least 256,000 bps (bits-per-second), though most connections today are much faster. They are measured in millions of bps (megabits or mbps) or billions of bps (gigabits).

Question 5

What is wifi

Answer 5

Wi-Fi is a technology that takes an Internet signal and converts it into radio waves, which can be picked up by devices with a wireless adapter. Home users are purchasing Wi-Fi routers, connecting them to their broadband connections, and then connecting multiple devices via Wi-Fi.

Question 6

What is bluetooth

Answer 6

Bluetooth is not generally used to connect devices to the Internet, even though it is an important wireless technology. It’s intend was to replace wired connections between devices. Today, it is the standard method for connecting nearby devices wirelessly.

Question 7

What is VoIP

Answer 7

VoIP is a protocol (called voice over IP), which enables sounds to be converted to a digital format for transmission over the internet and then recreated at the other end. (E.g Skype, Google hangouts).

Question 8

What is client-server computing

Answer 8

Client-server computing = when higher end computers get installed as servers, and users on the local network run applications and share information among departments and organisations.

Question 9

Intranet

Answer 9

Intranet = internal web pages that provide information about the organisation to their employees.

Question 10

Extranet

Answer 10

Extranet = is part of the company’s network that can be made available securely to those outside of the company (e.g. customers or suppliers).

Question 11

How to communicate about the internet?

Answer 11

TCP & IP

Question 12

What is an IP?

Answer 12

IP (network) = communicates between computers through datalinks.

Question 13

What is a TCP?

Answer 13

• TCP (transport) = communicates between applications.