Cisco WS-C4948-10GE-RF | Catalyst 4900 Series C4948-10GE 48 x RJ-45 Ports 10/100/1000Base-T + 2 x XFP 10GE Ports Layer 3 Managed Rack-mountable Gigabit Ethernet Network Switch

Here are 12 technical specifications for the Cisco Catalyst 4948 10 Gigabit Ethernet Switch:

1. Switching capacity: 136 Gbps
2. Forwarding rate: 102 Mpps
3. VLANs supported: 4,096
4. MAC address table size: 55,000 entries
5. Jumbo frame support: up to 9,216 bytes
6. Layer 2 switching: Yes
7. Layer 3 routing: Yes
8. Spanning Tree Protocol support: Yes
9. Quality of Service (QoS) support: Yes
10. Power supply: AC 120/230 V (50/60 Hz)
11. Dimensions (WxDxH): 17.5 in x 16.1 in x 1.7 in
12. Weight: 16.53 lbs

Helpful notes:
1. The Cisco Catalyst 4948 switch is a high-performance, low-latency 10 Gigabit Ethernet switch designed for data center and server room deployments.
2. With its advanced features and capabilities, this switch is ideal for demanding applications such as virtualization, cloud computing, and high-performance computing.
3. As a refurbished product, the Cisco Catalyst 4948 switch offers a cost-effective solution for organizations looking to upgrade their network infrastructure without breaking the bank.