CS: Networking: How the Internet Works
Understanding packets, addresses, routers, and web requests
CS: Networking: How the Internet Works
Understanding packets, addresses, routers, and web requests
CS - Grade 6-8
- 1
In your own words, explain what the Internet is. Include the idea of many connected networks in your answer.
Think about schools, homes, businesses, and data centers all being connected.
The Internet is a huge system of connected computer networks. These networks allow devices around the world to send and receive information. - 2
A student sends a photo to a friend online. The photo is split into smaller pieces before it travels. What are these small pieces called, and why is splitting the photo helpful?
The small pieces are called packets. Splitting the photo into packets helps the information travel more efficiently, and the packets can be reassembled when they reach the friend. - 3
What is an IP address, and why does a device need one to use the Internet?
Compare an IP address to a home address for mail.
An IP address is a number or label that identifies a device on a network. A device needs an IP address so data can be sent to the correct destination. - 4
A packet leaves your laptop and travels through several routers before reaching a website. What job does a router do?
A router forwards packets from one network to another. It uses address information to help choose where each packet should go next. - 5
Explain the difference between a domain name and an IP address. Use the example www.example.com in your answer.
One is easier for people to remember, and one is used by computers to route data.
A domain name is a human-friendly name for a website, such as www.example.com. An IP address is the numerical address computers use to find the server for that website. - 6
What does DNS do when you type a website address into a browser?
DNS, or the Domain Name System, looks up the domain name and finds the matching IP address. This allows the browser to connect to the correct web server. - 7
Put these steps in the correct order: A. The website sends data back to your device. B. You type a domain name into a browser. C. DNS finds the website's IP address. D. Your browser requests the web page from the server.
Start with the action the user takes first.
The correct order is B, C, D, A. First you type a domain name, then DNS finds the IP address, then the browser requests the web page, and finally the website sends data back. - 8
Packets from the same message do not always take the exact same path across the Internet. Explain how the message can still arrive correctly.
Each packet contains information that helps it reach the destination and fit back into the message. When the packets arrive, the receiving device can put them back in the correct order. - 9
What is a protocol in networking? Give one example of a networking protocol.
A protocol is like an agreed-upon set of communication rules.
A protocol is a set of rules that devices follow to communicate. One example is HTTP, which is used for loading web pages, or TCP, which helps deliver packets reliably. - 10
A video call becomes choppy and delayed. Name two possible network reasons this could happen.
A video call can become choppy if the connection has low bandwidth or high latency. It can also happen if many packets are delayed or lost during transmission. - 11
Explain the difference between bandwidth and latency.
Bandwidth is about amount, while latency is about time delay.
Bandwidth is how much data can be sent over a connection in a certain amount of time. Latency is the delay between sending data and receiving a response. - 12
A classmate says, "The Internet and the World Wide Web are the same thing." Explain why this statement is not correct.
Think of the Internet as the roads and the Web as one kind of traffic using those roads.
The statement is not correct because the Internet is the global network that connects devices and networks. The World Wide Web is one service that uses the Internet to access websites and web pages.