Sunday, May 22, 2016

5.7. Gateways

Gateways are application-particular interfaces that connect each of the seven layers of the OSI model when they are disparate at any or all levels. For example, on the off chance that you have to associate a network that utilizes one of the OSI networking models to one utilizing IBM's Systems Network Architecture (SNA) model, utilize an gateway. Gateways can likewise make an interpretation of from Ethernet to Token Ring, albeit more straightforward arrangements than gateways exist in the event that you need such an interpretation. Since gateways must interpret a lot, they have a tendency to be slower than different arrangements, especially under overwhelming burdens.

The essential use for gateways today is for taking care of email. POP3 and SMTP are two cases of conventions that are taken care of by gateways. Most email frameworks that can associate with unique frameworks either utilize a PC set up as a gateway for that errand or let the email server hold the gateway tasks itself.


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