The Cisco Catalyst 9200 Series Network Module C9200‑NM‑4G is an optional expansion module for selected models in the Cisco Catalyst 9200 Series (modular C9200 SKUs, not C9200L). It provides four 1-Gigabit Ethernet SFP module slots, enabling flexible fiber-optic or copper uplinks (via SFP transceivers or DAC cables) for connectivity to aggregation and core layers.

The module is inserted into the network module slot of the Catalyst 9200 switch and expands the fixed uplink ports with four additional 1G SFP ports. It supports a wide range of Cisco SFP transceivers (100/1000BASE-X) and is designed for use in enterprise networks, campus installations, and data centers.