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4. Carrier Networks > The Public Network
The Public Network
The structure of public networks can be broken up into three categories: the core section, Metropolitan Area Networks (MANs) within cities, and last-mile or access networks. The list that follows provides a brief description of each.
Note
Workers in the telecommunications and data-network industry often use different nomenclature for the same equipment or type of network. For example, core networks are also referred to as long-haul and backbone networks and last-mile networks are sometimes referred to as first-mile networks. Long-haul has the same meaning as core networks, and first-mile and last-mile networks are used synonymously with access networks. In addition, the terms “providers,” “carriers,” and “Internet Service Providers” (ISPs) are also used synonymously. They all provide voice, mobile service, video, or Internet access.
