Like any network, however, a wide area network must serve the purpose for which it is intended. Typical business intentions might include reducing equipment such as servers, centralising applications such as email, or facilitating unmetered voice calls between campuses. And so, when designing a wide area network, or any network for that matter, it is crucial to first understand the services and applications that the network must support. For example, it would be inappropriate to schedule over an unconfigured wide area network network a daily backup of a remote file server if that network was also intended to deliver a business application, because the backup would severely impact the performance of the business application.
Most networks are intended to support many applications. Most applications have particular behavioural characteristics. It is important to understand the applications and their characteristics in order to design and implement suitable network. Of equal importance is understanding the intended or likely future characteristics of the applications, which will help to ensure that any design decisions are future-proof.
The key fundamental of good network design is to ensure that bottlenecks do not adversely affect the performance or capacity of the overall system. Good wide area network design gives particular consideration to the network and transport layers of the OSI Model and TCP and UDP protocols.
Remex has more than a decade of experience in designing, implementing, supporting and evolving networks that meet our client’s requirements.