RFC 4282:The Network Access Identifier
RFC-Ref

ISP


Click on the red underlined text to get to the source

... o Regional Internet Service Providers (ISPs) operating within a particular state or province, looking to combine their efforts ...
... over a wider area. o National ISPs wishing to combine their operations with those of one or more ISPs in another nation to offer more comprehensive ...
... o National ISPs wishing to combine their operations with those of one or more ISPs in another nation to offer more comprehensive dialup service in a group ...
... o Wireless LAN hotspots providing service to one or more ISPs. o Businesses desiring to offer their employees a comprehensive ...
... Roaming capability can be loosely defined as the ability to use any one of multiple Internet Service Providers (ISPs), while maintaining a formal, customer-vendor relationship with only one. ...
... Examples of cases where roaming capability might be required include ISP "confederations" and ISP-provided corporate network access support. ...
... roaming capability might be required include ISP "confederations" and ISP-provided corporate network access support. ...



Google
Web
RFC-Ref