Cisco Certified Network Professional (CCNP) Question:
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Describe why postal addresses and telephone numbers are routable.

CCNP Interview Question
CCNP Interview Question


A postal address has three components that can be used to deliver mail: state, city, and street. A phone number has an area code and exchange. At the core layer, mail can be delivered to the next post office based on only the state or city and state information. A phone number is delivered at the core layer based on the area code.

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