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11 Cards in this Set
- Front
- Back
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Describe the peer-to-peer server model.
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- Game traffic flows directly from each peer to each other peer
- Each peer sends action information to every other peer. Peers must use this information in exactly the same way to produce exactly the same results. - All peers must agree exactly about what happens in the game because there is no authority (server) to perform corrections. |
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Describe the client-server model.
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- The server has absolute authority – “if the server didn’t see it, it didn’t happen”
- Players (clients) issue message only to the server (and not to other players)* - The server sends game updates to the clients (players) |
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What is a dedicated server?
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A Dedicated Server is a process who sole function is to serve clients.
The dedicated server: - Exists as its own process - Serves remote clients |
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What is a listen server?
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In a Listen Server, one process has both a client and a server thread.
The listen server: - Serves remote clients - Serves the local client (no latency) |
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What are the tasks usually required of a gaming server?
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idk, lul
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What are the tasks usually required of a gaming client?
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idk, lul
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What is the purpose of having a Master Server for a game or application?
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- Client Contacts to find games
- Server contacts to update master |
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Client-Server
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- Each game needs a server.
- Approximate representation of game world. - Scales well to many players. - Responsiveness determined by server. - Can not continue game if server crashes or disconnects. |
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Peer-to-Peer
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- Games do not need a server.
- Exact representation of game world. - Does not scale well. - Responsiveness determined by slowest peer. - No server so game can continue until all players disconnect. |
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Describe the process NAT:
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Packet sent with clients IP and Port
| NAT replaces IP and Port with it's own | Packet is forwarded to server | Server creates response packet | NAT replaces IP and port with originals | Client receives packet at it's own port |
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What is NAT?
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NAT allows a network to share a single internet connection over a single IP address.
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