The geographic footprint of the LAN or WAN generated by the host is a general measure describing its relative size. The host used by a small research team or your local Stuffer Shack does not need connectivity outside of a very limited area; on the other hand, your typical megacorporation wants their front-facing main host to span the entire globe, regardless of the cost.
Scale 1 Micro (Personal): Designed to cover a very limited area such as an apartment, home, or small office with a small number of users in the host at any given time. These systems are considered a local area network (or LAN). Depending on the security rating, the micro-scale personal host can be used for residential applications, independent professionals, or small research labs. Micro-scale hosts with wireless access turned off are also the perfect solution for high-security, local-access-only data archives.
Scale 2 Base (Facility): Covering a larger area than a micro-scale host, the base-scale host is also a LAN and is anchored to a single physical location at the Matrix ground level. These hosts are designed to serve a single building or a small compound. They are capable of handling the computing needs of most retail outlets, restaurants, large research labs, or small corporate facilities.
Scale 3 Net (Local): The smallest of the distributed host systems generating a wide area network (or WAN), the net-scale—or network-scale—host is designed to cover an area kilometers across. Framework net-scale systems are installed in several separate locations across the area served and then networked together to provide coverage. Net-scale hosts are represented above the ground level of the Matrix. They can provide service to a large corporate compound, an arcology, a district in a typical sprawl, or even a small town.
Scale 4 Macro (Sprawl): Providing coverage to a single large city or sprawl, the macro-scale host is a distributed WAN system typically used by city governments or as the main hosts of local corporations. Framework systems at this scale use the same technology as a net-scale host and in fact can just be considered several net-scale systems networked together.
Scale 5 Mega (National): Designed to span an entire large nation or the continental division of a corporation, mega-scale hosts are typically owned by national governments and AA-rated or larger corporations. Inside the virtual world of the Matrix, the mega-scale hosts fill in the middle areas, below the giant constructs of the AAAs but still far above the rest.
Scale 6 Exa (Global): The largest hosts possible, exa-scale hosts provide coverage to the entire planet. The handful that exist are owned by the world’s megacorporations, and their icons dominate the virtual sky of the Matrix, floating kilometers above everything else.