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Implementing Cisco Networking Solutions by Harpreet Singh

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Functionality

"The function of design is letting design function."
- Micha Commeren

Functionality is the quality or state of being functional. It is the most essential element of network design. The primary function of network design is to meet the requirements of the users, and make the network deliver what was agreed with the users as requirements. If a network does not do what it is designed to do, it is a failed design regardless of whatever else it might have.

If a network was built to carry multiple types of traffic but ended up being capable of carrying only a certain type of traffic while the other types traffic could not be delivered either due to lack of support for the protocols or bandwidth, the network is not functional. Also, ...

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