Definitions, please....

Hi, can somebody point me at or give me some sort of at least
semi-formal definition of the following terms:
Anything would help.
Thank you.
Herb Kugel

  NAP - Network Access Point: Used bby the US-NSF to describe thier
    prefered exchange points.
  MAE-East - Metro Area Exchange: Used by Metropolitan Fiber Systems
    to name its exchange point in the Washington DC area.
  MAE-West - Metro Area Exchange: Use by MFS to name the common exchange
    in the SF Bay Area. Shared with NASA/AMES

  Check out