Computer Science
Grade 6
20 min
Game Networking: Client-Server and Peer-to-Peer Architectures
Learn about game networking, including client-server and peer-to-peer architectures, and how to implement multiplayer games.
What you'll learn
- Differentiate between client-server and peer-to-peer game networking architectures by identifying at least three key characteristics of each model, with 100% accuracy, in a written comparison.
- Explain the advantages and disadvantages of both client-server and peer-to-peer architectures in the context of game development, providing specific examples of game genres that are best suited for each architecture, with at least 80% accuracy, in a class discussion.
- Apply the principles of client-server architecture to design a basic network protocol for a simple multiplayer game, including message structure and server-side logic, demonstrating functionality by successfully transmitting and receiving at least one type of game-related data between a client and server instance.
- Analyze a given game scenario (e.g., a real-time strategy game with 100 players) and justify, with clear reasoning and supporting evidence, whether a client-server or peer-to-peer architecture would be more appropriate, considering factors such as scalability, security, and latency, in a written report evaluated using a rubric.
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Define the terms 'client', 'server', and 'peer' in the context of online games.
Draw a simple diagram showing how information flows in a Client-Server model.
Draw a simple diagram showing how information flows in a Peer-to-Peer (P2P) model.
List two advantages and two disadvantages for both Client-Server and P2P architectures.
Explain which model is better suited for a large-scale game versus a small, private game.
Predict what happens if a server or a host player disconnects from a game.
Ever wonder how you can play a game like 'Among Us' or 'Minecraft' with friends all over the world? 🎮 Let's uncover the secret messages computers send to make it happen!
In this lesson, we'll explore the two m...
2
Key Concepts & Vocabulary
TermDefinitionExample
NetworkA group of connected computers that can share information with each other. For games, this is usually the internet.When you play a game on your tablet with a friend on their laptop, both devices are connected to the internet network to talk to each other.
ClientA player's computer, console, or phone in the game network. A client has to ask a central server for information about the game.Think of yourself in a library. You are the 'client' asking the librarian (the server) where to find a book.
ServerA powerful, central computer that runs the game and has all the official information. It tells all the clients what is happening.In a huge game like 'Fortnite', a server run by the game company keeps track of every player's location, h...
3
Core Syntax & Patterns
The Client-Server Rule (The Librarian)
1. Client sends its action (e.g., 'I moved forward') to the Server.
2. Server checks the action and updates the main game world.
3. Server sends the updated game world back to ALL clients.
Use this model when you need one single source of truth, like in a big game with many players. The server is the boss and prevents cheating.
The Peer-to-Peer Rule (The Group Chat)
1. A Peer sends its action (e.g., 'I threw a punch') to every other Peer.
2. Every Peer receives the message and updates their own version of the game.
Use this model for small games with few players (usually 2-8). It can be faster because there's no middleman (server), but it relies on everyone's internet connection being good.
4 more steps in this tutorial
Sign up free to access the complete tutorial with worked examples and practice.
Sign Up Free to ContinueSample Practice Questions
Challenging
A small startup company wants to create a 4-player cooperative game where friends explore a cave together. The company has a very small budget. Which model is the most logical choice and why?
A.Peer-to-Peer, because it doesn't require the company to buy and maintain an expensive server.
B.Client-Server, because it's the only way to make sure the 4 players stay synchronized.
C.Client-Server, because it can handle a small number of players more efficiently.
D.Peer-to-Peer, because it is more secure and prevents players from cheating their friends.
Challenging
In a Client-Server game, Player A has a very laggy connection, while Player B has a perfect connection. They both see each other and shoot at the exact same time on their own screens. Who determines which shot is registered first?
A.Player B, because their connection is faster.
B.The Server, based on which player's 'shoot' command it receives first.
C.Player A, because the game gives an advantage to laggy players.
D.Whoever has the more powerful computer.
Challenging
In a 'pure' P2P game (with no host), it's possible for Player 1's screen to show they won, while Player 2's screen shows a draw. Why can this 'desync' happen in P2P but is very unlikely in Client-Server?
A.Because P2P games are programmed with more bugs.
B.Because Client-Server games run at a faster speed.
C.Because in P2P, each peer decides the game's outcome on its own, and tiny delays can make them disagree. A server provides one final decision for everyone.
D.Because players in P2P games can edit the game code to make themselves win.
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing FreeMore from Game Development: Advanced Techniques and Engine Architecture
Game Engine Architecture: Components and Design Patterns
Rendering Pipelines: Forward Rendering and Deferred Rendering
Shaders: Vertex Shaders and Fragment Shaders (GLSL/HLSL)
Physics Simulations: Rigid Body Dynamics and Collision Detection
Game Design Principles: Gameplay Mechanics and Level Design
Computer Science for other grades
Frequently asked questions
What grade level is "Game Networking: Client-Server and Peer-to-Peer Architectures"?
Game Networking: Client-Server and Peer-to-Peer Architectures is a Grade 6 Computer Science lesson on ExcelOS.
What will I learn in Game Networking: Client-Server and Peer-to-Peer Architectures?
You'll be able to: Differentiate between client-server and peer-to-peer game networking architectures by identifying at least three key characteristics of each model, with 100% accuracy, in a written comparison; Explain the advantages and….
Is "Game Networking: Client-Server and Peer-to-Peer Architectures" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Game Networking: Client-Server and Peer-to-Peer Architectures?
This lesson includes 27 practice questions across multiple difficulty levels, each with instant feedback and explanations.