Nework Analogy, PLEASE READ!

Module 4 Network Analogy EXAMPLE

You write a letter to your friend in Central City, Ohio, put their physical address on the envelope, and place it in a United States Postal Service (USPS) drop box for routing and delivery.  A mail carrier retrieves your letter and all the other mail from the drop box and takes it to a local location (post office) for sorting and routing. At the post office, your letter and other items are sorted according to the state listed on the envelope.   All mail including your letter that is going to Ohio is loaded onto a truck or plane and transported to a new sorting location in Ohio.  At that location, the mail is sorted by cities in Ohio, your letter gets put in the Central City pile and is again shipped off, most likely by truck to a location in Central City.  At this location, the mail is all sorted according to the zip code first and then the actual street address, placed with a mail carrier and sent out for delivery.  Your friend receives your letter and the process is complete.  This is the basic idea of how a network transmits electronic information.