The JBX05749 2m 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents a cost-effective and reliable solution for modern data center networking requirements. Specifically designed as an Arista-compatible alternative to OEM part number CAB-Q-Q-100G-2M, this cable delivers enterprise-grade performance without enterprise pricing. **Technical Specifications:** This passive DAC cable utilizes 28AWG twinax copper construction with QSFP28-to-QSFP28 connectors, meeting the demanding requirements of 100GBASE-CR4 Ethernet standards. The cable qualifies to IEEE 802.3bj specifications and QSFP28 MSA standards, ensuring compatibility with leading networking equipment manufacturers. With a 2-meter length, it's ideal for direct server-to-switch or switch-to-switch connections within standard rack configurations. **Performance and Reliability:** The passive design eliminates the need for active circuitry, reducing power consumption and heat generation while maintaining exceptional signal integrity. Operating across a 0-70°C temperature range, this cable performs reliably in both climate-controlled data centers and environments with temperature fluctuations. The copper construction with plastic jacketing provides durability and resistance to bending stress during installation and maintenance. **Compliance and Safety:** Fully RoHS and ELV compliant, this cable adheres to EU directive 2002/95/EC requirements. It carries multiple safety certifications including RoHS, TUV, and UL verification, ensuring it meets the highest industry standards for electrical safety and environmental responsibility. **Applications:** Perfect for high-speed data center interconnects, cloud computing infrastructure, and enterprise networking environments. This cable is particularly suited for organizations standardizing on Arista networking equipment or those requiring cost-effective direct attach solutions for 100GB connectivity. **Warranty and Support:** Backed by a comprehensive 90-day limited warranty, this cable includes customer support for any technical concerns. Custom brand programming is available for organizations requiring vendor-specific identification. **Shipping and Availability:** Available with free standard shipping on orders exceeding $99. Ships from convenient locations in Danville, CA and Beaufort, SC, ensuring rapid delivery to your facilities.