Scenario taxonomy
Contents
Scenario Taxonomy
Introduction
This taxonomy addresses different scenarios that may occur in implementation of XO laptops and school servers. The taxonomy in its current form is simple and by no means comprehensive. Hopefully, this will change over time.
Use cases
These scenarios can be reinforced with use cases that provide a hypothetical example of use and often help in understanding needs and assessing constraints.
Server components
- Backup
- Upgrade and configuration management
- Network Gateway
- Caching Proxy
- Authentication
- Content management
- Repository
Infrastructure constraints
Infrastructural constraints are very important and often drive the decision to use a laptop/mobile or desktop/lab environment or some combination thereof. Two major components of the infrastructure are power (grid-based electricity) and backhaul (connectivity to the Internet). In the following table, we have a combination of the two on a granular scale akin to low, medium, and high.
| No grid infrastructure | Grid infrastructure available, but does not work reliably | Reliable grid infrastructure | |
| No backhaul | Worst case scenario | ||
| Limited backhaul (cellular, satellite, dial-up) | |||
| Good backhaul (DSL, Cable, or anything that can be called “high speed”) | Best case scenario |
Note here we also have to consider the different approaches that a NOC can take in each country. This is hard to tabulate (at least now for me, says martin ;-) ) but we'll eventually have a grid describing it.
