1.3.2 Networks

Question 1

What are the requirements of a wired connection?

Answer 1

Physical cables like Ethernet (copper/fibre optic)
Network Interface Card

Question 2

What are the requirements for a wireless connection?

Answer 2

Wireless Network Interface Card

Question 3

What are the pros and cons of wired connections?

Answer 3

Faster, more secure
but restricted movement, NIC required

Question 4

What are the pros and cons of wireless connections?

Answer 4

Freedom of movement, WNIC required
But slower, less secure

Question 5

What is an IP address?

Answer 5

A unique number acting as an address for a computer which communicates accross WANs

Question 6

How is an IPv4 address formatted?

Answer 6

Written as four groups of numbers within the range 1-255, separated by periods. (4 bytes)
4 billion possible addresses

Question 7

How is an IPv6 address formatted?

Answer 7

Written as eight groups of numbers; each group made up of 4 hex values, total representing 16 bits per group. Separated by colons

Question 8

How is a MAC address formatted?

Answer 8

Written as six groups of 2 hex values; separated by dashes

Question 9

What are standards and protocols?

Answer 9

They are guidelines/rules that allow computer systems to communicate

Question 10

What are the needs for standards & protocols?

Answer 10

Allow hardware/software to interact across different manufacturers, without them devices wouldn’t be able to communicate

Question 11

What is TCP/IP?

Answer 11

Transmission Control Protocol/ Internet Protocol
TCP allows data packets to be sent and received
IP routes and addresses data packets

Question 12

What is HTTP/HTTPS

Answer 12

Hypertext Transfer Protocol transfers web pages over the Internet
HTTP Secure adds in encryption and authentication

Question 13

What is FTP?

Answer 13

File Transfer Protocol sends files between computers on a WAN and uploads/downloads files to/from a web server.

Question 14

What is SMTP?

Answer 14

Simple Mail Transfer Protocol sends emails between mail servers.

Question 15

What is POP and IMAP?

Answer 15

Post Office Protocol and Internet Message Access Protocol: both receive and store emails from a mail server
POP deletes email from the email server once it has been downloaded to a device.
IMAP syncs email with mail server, so it can be accessed by different devices

Question 16

What are the benefits of layers?

Answer 16

Splitting a network design into layers benefits programmers since it simplifies design, making it easier to modify and use.