Introduction
Over the past several years, switching has evolved from simple Layer 3 switches to switches supporting Layer 4 through Layer 7 features, such as server load balancing, URL inspection, firewalls, VPNs, access-based control, and so on, with large port densities. The multilayer switch has become an all-in-one component of the network infrastructure. As a result of this evolution, enterprise and service providers are deploying multilayer switches in place of multiple network components, such as routers and network appliances. Switching is no longer a part of the network infrastructure; it is now the network infrastructure, with wireless as the latest evolution.
As enterprises, service providers, and even consumers deploy multilayer switching, ...
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