Client server Relationship

Question 1

What is a URN?

Answer 1

Uniform Resource Name: identifies the namespace of the resource without the protocol. Such as; www.ebay.co.uk (no https://)

Question 2

What is a URL?

Answer 2

Uniform Resource Locator: it’s the protocol and the URN of the resource. Example https://www.ebay.co.uk/cars

Question 3

What is URI?

Answer 3

Uniform Resource Identifier: it is the entire address. Including URL plus the fragment. Example: https://www.ebay.co.uk/cars.page3

Question 4

What does TCP stand for?

Answer 4

Transmission Control Protocol

Question 5

What does UDP stand for?

Answer 5

User Datagram Protocol

Question 6

What is port 80 used for?

Answer 6

Web servers (web pages)

Question 7

What is port 21 used for?

Answer 7

FTP file transfer protocol

Question 8

What is the difference between TCP and UDP?

Answer 8

TCP sends an acknowledgment of packets so no packets are lost. While UDP does not, allowing for it to perform faster but with less accuracy. Making UDP good for live streaming such as webcams

Question 9

How does TCP function?

Answer 9

It breaks the message to the recipient in to segments and numbers each segment. So that if one segment is lost it resends that specific segment again. Then on the recipient side TCP reforms the message by putting those segments together in the number order it sent them

Question 10

What port is a mail server?

Answer 10

Port 25