One of the most significant benefits of owning network equipment is the wide variety of available modules. These modules provide flexibility and functionality that help reduce cost, decrease downtime, and increase capability in equipment you already own. Why replace an entire switch when all you need is a compatible module to provide you with extra SFP ports, or why replace an entire router when all you need to add is a compatible module with WAN capability?
Expansion modules are available for various equipment, including switches, routers, and security devices. They offer a robust, scalable, and flexible way to enhance network capabilities, including speed, security, reliability, and bandwidth management. These options include NIM modules, WIC, HWIC, VWIC, SFP expansion modules, PVDM cards, switching modules, and supervisor engines.
The primary function of Cisco modules is to offer specific functionalities such as Ethernet, Fiber Channel, T1/E1, DSL, or other connection types to Cisco devices. For example, a Gigabit Ethernet module can be added to a switch to provide additional Gigabit Ethernet ports.