You already know that each computer connected to the internet has its own equivalent of a phone number called its Internet Protocol or IP address. So what we take for granted as a 10-digit “phone number” is really a construction of three distinct numbers, each with a specific meaning. It’s this number that identified each pair of wires that left the exchange and arrived at a real telephone set in someone’s home. And finally, the four-digit line number.Located near the city of Duvall in western Washington is a small utility building that houses the equipment that is the 788 exchange. For example, 788 represents the “Duvall” exchange. The exchange identified the switching equipment that covered a sub-region within the area code.
#ANOTHER TERM FOR SUBNET MASK CODE#
Area code 206, for example, was, at one time, all of western Washington state.
Originally, an area code defined exactly that - a geographical area. In North America, phone numbers are 10 digits long, and comprised of three parts: 1 It’s an imperfect comparison, but I think it’ll help make the point. I’m going to use phone numbers as an analogy. Besides being completely unhelpful, that definition actually opens up a slightly larger can of worms. You want to know anyway, don’t you? Fair enough.Ī subnet mask is just a nifty way to define sub-networks. You may have to enter one into a router configuration, but it’s typically something you’ll be given without needing to know exactly what it means. Well, to be blunt, it’s something you probably don’t need to know about.
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