Virtual LAN (VLAN) technology is an integral technology for extending the reach of enterprise networks across wide area networks. As a result, designers need to have a strong understanding of VLAN ...

Rate your favorite Cisco Press books. Chapter 3, “Switch Operation,” presents a functional overview of how multilayer switching (MLS) is performed at Layers 3 and 4. The actual MLS process can take ...

Joel is an internationally recognized expert in the areas of security, networking and messaging. Follow him on X (formerly Twitter) @joelsnyder. Building enterprise networks with routers and switches ...

Network vendors have fallen prey to vulnerabilities in Ethernet VLAN protocol implementations. While only Cisco and Juniper Networks are confirmed to have vulnerable products at this stage, a notice ...

Many of us cordially detest virtual LANs (VLANs). They require complicated configuration, and consequently they are error-prone. They do not offer fully satisfactory solutions for the problems they ...

Have you been told that VLANs are the ultimate solution to your network woes? That they’ll magically secure your infrastructure, eliminate complexity, and solve all your traffic management headaches?

Virtualization, arguably describable as "software-defined workloads," has become inextricably intertwined with both Software-Defined Storage (SDS) and Software-Defined Networking (SDN). The past ...