Are all core switches 10 Gigabit Ethernet

Yes, many core switches, including Cisco Nexus 5600 and Catalyst 4948, support 10 Gigabit Ethernet ports.

Cisco Nexus 5600 Series

The Cisco Nexus 5600 platform includes 10-Gigabit Ethernet switches designed for data center deployment. For example, the Cisco Nexus 5672UP switch provides up to 72 10-Gigabit Ethernet ports using QSFP breakout cables, along with 40-Gigabit uplinks for network-facing connections. These switches support Layer 2 and Layer 3 features at wire speed, FCoE, and low latency (~1 microsecond), making them suitable for high-performance core or aggregation roles in enterprise and cloud environments .

Cisco Catalyst 4948

The Cisco Catalyst 4948 is a 1RU, fixed-configuration switch that offers 48 ports of 10/100/1000BASE-T and 2 ports of 10-Gigabit Ethernet using X2 optics. It is optimized for rack-level server aggregation and provides wire-speed, low-latency performance with advanced Layer 2–4 features, making it a viable option for core or distribution layers in smaller networks .

NETGEAR 10Gb Switches

NETGEAR also offers core-capable switches with 10-Gigabit copper and fiber ports, such as the XS716T with 16 10GbE copper ports and 2 combo SFP+ fiber ports, and the XS728T with 24 10GbE copper ports plus 4 dedicated 10G SFP+ fiber ports. These switches can serve as the center of a small business network or as aggregation switches in larger networks, providing high-speed connectivity to servers, NAS devices, and other 10GbE-capable endpoints .

Summary

Core switches in modern enterprise and data center networks commonly support 10-Gigabit Ethernet, often alongside higher-speed uplinks (40GbE) and advanced Layer 2/3 features. When selecting a core switch, consider port density, uplink speed, latency, and support for virtualization or FCoE to ensure it meets your network performance requirements .