Maintain service coverage for a Cisco Nexus 31128PQ switch where network availability requires a defined 24x7 support schedule and a 4-hour service level. CON-L14HR-N3KC311G is a Cisco CX Level 1 support offering associated with that Nexus switch platform. It is a service entitlement, not a Nexus switch, transceiver, cable, or expansion module. The 24x7x4 designation identifies the operating coverage and service-level profile: assistance is available around the clock, every day of the week, with a four-hour service level. That profile fits network infrastructure supporting workloads that cannot wait for business-hours-only assistance, including aggregation, data-center connectivity, and high-use server access networks built around the supported Nexus platform. Cisco CX Level 1 distinguishes this offering by pairing the Level 1 support designation with continuous 24x7 coverage and the 4-hour service level. Select it when the installed platform is specifically a Nexus 31128PQ switch and the required support profile calls for those named service characteristics. The product scope centers on maintaining support for the existing switch platform rather than adding ports, changing interface speed, or supplying replacement networking hardware as a separate product.