Both fixed and mobile networks use similar architectures in the core network, diverging mostly in the access network. Core network transport these days always uses optical fiber media. Transport networks (sometimes known as distribution networks) that move traffic from the access network to the core network also are commonly based on optical fiber platforms.
Access networks that move traffic from customer sites to transport aggregation points rely on different media (cable versus wireless radios).
The other common change is that both fixed and mobile networks can be described without reference to places where processing operations occur. In virtualized and distributed networks, that can happen at many different places.
In past days transitions between portions of the network would happen at processing locations such as central offices, which traditionally terminated the access network. These days, processing no longer is a consistent demarcation point between network segments (core, transport/distribution and access).
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