The Internet

Question 1

What is a WAN and why is it different to a LAN?

Answer 1

A WAN covers a large geographical area and connects multiple LANs together into one network.

Question 2

What is an IPv4 address?

Answer 2

An IPv4 address is four 8-bit numbers seperated by dots. E.g. 79.124.57.219 and identifies a computer on the internet.

Question 3

What is an IPv6 address?

Answer 3

An IPv6 address is similar to IPv4 but is made up of 128 bit numbers represented in hex. E.g. 1023:0ef1:0000:0000:34dd:00fe:0189:2233

Question 4

What problem does packet switching fix?

Answer 4

Circuit switching

Question 5

How large is a typical packet?

Answer 5

1500 bytes (around about a kilobyte)

Question 6

What data are packets given when they leave? (5 Not including cargo)

Answer 6

• The IP address it is going to
• The IP address it has come from
• The sequence number of the packet
• The number of packets in the whole communication
• Error checking data

Question 7

What is circuit switching?

Answer 7

Giving two devices (or nodes) a direct and dedicated connection before they communicate to ensure the full bandwidth is available for that communication.