What a proxy server is

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Quick Questions

Shade in the A or B circle for each question.

1. Where does a proxy server sit in a network?

A Between the user's device and the internet

B Inside the web server that hosts the website

2. When a student opens a website through a proxy server, where does the request go first?

A Straight to the web server

B To the proxy server

3. Which statement describes what a proxy server does with a web request?

A It passes the request on to the web server on the user's behalf

B It deletes the request and shows an error to the user

4. How does the web server's response get back to the user when a proxy is used?

A It returns through the proxy server

B It skips the proxy and goes straight to the device

5. Which place is a common use of a proxy server?

A A single offline calculator

B A school or company network

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1proxy server		ASchool computers -> Proxy -> Internet
2User -> Proxy -> Web server		BThe order is wrong. The user's request must go to the proxy first, not to the web server directly.
3The web server's response comes back to the user through the proxy server		CA server that sits between a user's device and the internet and passes web requests on for the user
4Schools and companies use a proxy server so all web requests from their computers pass through one server		DWeb server -> Proxy -> User
5User -> Web server -> Proxy		EThe request goes to the proxy first, which then passes it on to the web server
6A proxy server is a website that stores a user's files		FA proxy server is not a website for storing files. It is a server between the user and the internet that passes requests and responses on.

Definitions

proxy server

Fill in the Blanks

Complete each line of code by filling in the missing parts.

Device -> _____ server -> Web server

Response: Web server -> _____ -> Device

Proxy sits between device and the ________

Device sends a _______ to the proxy first

Proxies are used in _______ and companies

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A user SEND request TO proxy

B proxy SEND request TO user

C server SEND page TO proxy

D proxy SEND page TO user

Question 2

A request <- "www.bbc.co.uk"

B SEND request TO proxy

C proxy STORE request ONLY

D server SEND page TO proxy

Question 3

A server SEND page TO proxy

B proxy RECEIVE page

C server SEND page TO user

D user DISPLAY page

Question 4

A device <- "student laptop"

B network <- "school"

C device SEND request TO server

D proxy SEND request TO server

Question 5

A staff <- "company laptop"

B proxy <- "web server"

C staff SEND request TO proxy

Answer Key

What a proxy server is

Section A: Quick Questions

A — Between the user's device and the internet

B — To the proxy server

A — It passes the request on to the web server on the user's behalf

A — It returns through the proxy server

B — A school or company network

Section B: Match the Pairs

proxy server → A server that sits between a user's device and the internet and passes web requests on for the user

User -> Proxy -> Web server → The request goes to the proxy first, which then passes it on to the web server

The web server's response comes back to the user through the proxy server → Web server -> Proxy -> User

Schools and companies use a proxy server so all web requests from their computers pass through one server → School computers -> Proxy -> Internet

User -> Web server -> Proxy → The order is wrong. The user's request must go to the proxy first, not to the web server directly.

A proxy server is a website that stores a user's files → A proxy server is not a website for storing files. It is a server between the user and the internet that passes requests and responses on.

Section C: Definitions

proxy server — A server between a user's device and the internet. It receives the user's web requests, passes them to the web server for the user, then returns the response. Used in schools and companies.

Section D: Fill in the Blanks

Device -> proxy server -> Web server

Response: Web server -> proxy -> Device

Proxy sits between device and the internet

Device sends a request to the proxy first

Proxies are used in schools and companies

Section E: Spot the Error

B — The proxy passes the request on to the web server, not back to the user. Line 2 should be: proxy SEND request TO server.

C — A proxy server does not just keep the request. It passes the request on to the web server for the user. Line 3 should be: proxy PASS request TO server.

C — The response returns through the proxy. The web server sends the page to the proxy, which then sends it to the user. Line 3 should be: proxy SEND page TO user.

C — In a school the request goes to the proxy server first, not straight to the web server. Line 3 should be: device SEND request TO proxy.

B — A proxy server is not the web server. It sits in the middle between the user's device and the web server. Line 2 should describe it as a middle server.