UDP/IP

Question 1

What does the term “UDP” stand for?

Answer 1

User Datagram Protocol

Question 2

It is a stateless protocol that doesn’t require a constant connection between the two devices for data to be sent. For example, the Three-way handshake does not occur, nor is there any synchronisation between the two devices.

Answer 2

UDP

Question 3

UDP packets are much simpler than TCP packets and have fewer headers. However, both protocols share some standard headers:

Answer 3

Time to Live (TTL)
Source Address
Destination Address
Source Port
Destination Port
Data

Question 4

This field sets an expiry timer for the packet, so it doesn’t clog up your network if it never manages to reach a host or escape!

Answer 4

Time to Live (TTL)

Question 5

The IP address of the device that the packet is being sent from, so that data knows where to return to.

Answer 5

Source Address

Question 6

The device’s IP address the packet is being sent to so that data knows where to travel next.

Answer 6

Destination Address

Question 7

This value is the port that is opened by the sender to send the UDP packet from. This value is randomly chosen (out of the ports from 0-65535 that aren’t already in use at the time).

Answer 7

Source Port

Question 8

This value is the port number that an application or service is running on the remote host (the one receiving the data); for example, a webserver running on port 80. Unlike the source port, this value is not chosen at random.

Answer 8

Destination Port

Question 9

This header is where data, i.e. bytes of a file that is being transmitted, is stored.

Answer 9

Data

Question 10

What type of connection is “UDP”?

Answer 10

Stateless

Question 11

What protocol would you use to have a video call?

Answer 11

UDP

Question 11

What protocol would you use to transfer a file?

Answer 11

TCP