D-Link DXS-3600-EM-Stack physical stacking module 

In more technical terms, the DXS-3600-EM expansion modules come in several configurations, including options for 10G SFP+ ports, 10GBASE-T connections, and 40G QSFP+ ports. These modules enable the DXS-3600 Series switches to accommodate a higher number of connections, increasing overall port density. For instance, the DXS-3600-EM-4QXS module adds four 40G QSFP+ ports, which can be used for high-speed uplinks or inter-switch connections. Additionally, the DXS-3600-EM-Stack module allows for stacking multiple switches, providing up to 480G stacking bandwidth, which enhances performance and redundancy. The modular design ensures that users can easily install or replace these modules without disrupting the network, making it a flexible solution for evolving network needs.