Computer Science
Grade 7
20 min
Network Types
Network Types
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1
Introduction & Learning Objectives
Learning Objectives
Define what a computer network is.
Identify and describe a Personal Area Network (PAN), a Local Area Network (LAN), and a Wide Area Network (WAN).
Compare the key differences between PAN, LAN, and WAN based on their size, range, and purpose.
Provide at least two real-world examples for each network type.
Explain the role of a router in connecting a LAN to the internet (a WAN).
Diagram the relationship between a PAN, a LAN, and a WAN.
Ever wondered how your wireless headphones instantly connect to your phone, but your school computers need cables to share a printer? 🎧➡️📱 Let's explore the different 'sizes' of networks that make this happen!
In this lesson, we will discover the three main types of computer networks: PAN, LAN, and WAN. Unde...
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Key Concepts & Vocabulary
TermDefinitionExample
Computer NetworkA group of two or more connected devices that can share information and resources like files, printers, or an internet connection.The computers in your school's computer lab are a network because they can all print to the same printer.
PAN (Personal Area Network)A very small network used for connecting devices centered around a single person, usually within a range of a few meters.Connecting your smartwatch to your phone using Bluetooth to get notifications on your wrist.
LAN (Local Area Network)A network that connects devices in a limited, 'local' area like a home, a school, or a single office building.Your home Wi-Fi network that connects your laptop, tablet, and smart TV to the internet is a LAN.
WAN (Wide Area Network)A network that...
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Core Syntax & Patterns
The Scope Rule
Network Type is determined by its geographical size or scope.
Use this rule to quickly identify a network. If it's just for your personal devices close to you, it's a PAN. If it's within one building, it's a LAN. If it connects different buildings or cities, it's a WAN.
The Connection Hierarchy
PANs connect to devices on LANs, and LANs connect to WANs.
Networks are built like nesting dolls. Your Bluetooth headphones (PAN) connect to your phone. Your phone (on the LAN) connects to your home Wi-Fi router. Your router (the gateway) connects your entire LAN to the internet (the WAN).
Technology Matches Purpose
The technology used is chosen based on the network's purpose and size.
Short-range, low-power connections like Bluetoo...
5 more steps in this tutorial
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Challenging
A student argues, 'A PAN is just a tiny wireless LAN.' Using the concepts of purpose and technology from the tutorial, what is the best critique of this statement?
A.The statement is correct; there is no real difference.
B.The statement is incorrect because PANs are always wired and LANs are always wireless.
C.The statement is weak because it ignores key differences in purpose and technology; PANs use low-power tech like Bluetooth for a single user's devices, while LANs use higher-power tech like Wi-Fi to provide network access to a whole area.
D.The statement is weak because LANs are for homes and PANs are for offices.
Challenging
You are designing a network for a new school. You must provide for: (1) Connecting classroom PCs to shared printers, (2) Allowing teachers to use Bluetooth styluses with their smartboards, and (3) Connecting the school to the district's main server in another city. Which combination correctly matches these needs to network types?
A.(1) LAN, (2) WAN, (3) PAN
B.(1) LAN, (2) PAN, (3) WAN
C.(1) WAN, (2) LAN, (3) PAN
D.(1) PAN, (2) LAN, (3) WAN
Challenging
Based on the 'Technology Matches Purpose' rule, why would it be a very poor design choice to use Bluetooth technology to create the main network for an entire office building?
A.Bluetooth is too expensive to use for a large area.
B.Bluetooth has a very short range and lower power, making it unsuitable for covering a large area like an office and connecting many high-traffic devices.
C.Bluetooth is not secure enough for business use.
D.Bluetooth can only connect two devices at a time, so it wouldn't work for an office.
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