ABSTRACT
To better understand this network architecture concept, let us consider Peter in Boston who writes a letter to Christine in Bristol. ˆe letter is written using a speci†c protocol, starting by “Dear Christine” and ending by “Warm regards” and signature. ˆe letter is inserted into an envelope, to which the destination address (Christine’s address) is written in a speci†c location. ˆe envelope is transported and delivered to the post o‡ce in Boston, where a stamp is added in a speci†c location. ˆis post o‡ce will send the letter through the post o‡ce network, which may use several means of transportations (van, bus, airplane, train, etc.) to allow the delivery of the letter at the post o‡ce in Bristol. In Bristol, the letter will be distributed between zones based on the destination addressed and delivered to the postman, who will post the letter in Christine’s mailbox.
