Learning objective
The Internet and how it works: Understand the structure of the Internet. Understand the role of packet switching and routers. Know the main components of a packet. Define: • router • gateway. Consider where and why they are used. Explain how routing is achieved across the Internet. Describe the term 'uniform resource locator' (URL) in the context of internetworking. Explain the terms ‘fully qualified domain name’ (FQDN), ‘domain name’ and ‘IP address’. Describe how domain names are organised. Understand the purpose and function of the domain service and its reliance on the Domain Name Server (DNS) system. Explain the service provided by Internet registries and why they are needed.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Topic
The Internet
Subtopic
The Internet and how it works
Study support
Understand this objective
Quick explanation
The Internet and how it works: Understand the structure of the Internet. Understand the role of packet switching and routers. Know the main components of a packet. Define: • router • gateway. Consider where and why they are used. Explain how routing is achieved across the Internet. Describe the term 'uniform resource locator' (URL) in the context of internetworking. Explain the terms ‘fully qualified domain name’ (FQDN), ‘domain name’ and ‘IP address’. Describe how domain names are organised. Understand the purpose and function of the domain service and its reliance on the Domain Name Server (DNS) system. Explain the service provided by Internet registries and why they are needed
- This point belongs to The Internet, especially The Internet and how it works.
- You need to be able to the Internet and how it works: Understand the structure of the Internet. Understand the role of packet switching and routers. Know the main components of a packet. Define: • router • gateway. Consider where and why they are used. Explain how routing is achieved across the Internet. Describe the term 'uniform resource locator' (URL) in the context of internetworking. Explain the terms ‘fully qualified domain name’ (FQDN), ‘domain name’ and ‘IP address’. Describe how domain names are organised. Understand the purpose and function of the domain service and its reliance on the Domain Name Server (DNS) system. Explain the service provided by Internet registries and why they are needed.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Why it matters
This objective helps connect The Internet and how it works to exam-style questions, flashcards, and revision notes for The Internet.
Quick student answer
What is the main purpose of packet switching on the Internet?
Direct answer
Data is divided into packets so that the packets can be routed across interconnected networks.
Key terms
- Gateway: A point used to connect different networks and allow communication between them.
- Internet registry: A service that supports the organisation and registration of Internet names and addresses.
Common trap
Confusing DNS with a router: DNS provides the service of associating domain names with IP addresses using Domain Name Servers. Routers forward packets between networks.
Related questions
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Flashcard prompts
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Revision tools