DAC Direct Attach Cables, also known as high-speed cables or direct attach copper cables, are typically purchased in fixed lengths with fixed connectors on both ends. They cannot be replaced, and the module head and copper cable cannot be separated. Simply put, a high-speed DAC cable has transceiver modules attached at both ends of a cable. They are widely used in storage area networks, data centers, and high-performance computers.

Cisco DAC copper core direct connect cables are suitable for very short distances and provide an economical and efficient way to connect devices within racks and across adjacent racks, typically used for intra-switch connections in optical port switches. Cisco provides lengths of 1, 2, 3, 4, 5, and 7 meters of Twinax cables. Walsun, a professional optical module manufacturer, can supply 10G SFP+, 25G SFP28, 40G QSFP+, 56G QSFP+, and 100G QSFP28 DAC high-speed cables, with advantages such as high performance, low power consumption, and low cost.

Cisco DAC Classification

        10G SFP+ to SFP+ DAC

        25G SFP28 to SFP28 DAC

        40G QSFP+ to QSFP+ DAC

        40G QSFP+ to 4 SFP+ DAC

        100G QSFP28 to QSFP28 DAC

        100G QSFP28 to 4 SFP28 DAC

In summary, Direct Attach Cables (DAC high-speed cables) offer high performance, strong integrated solution capabilities, low power consumption, low cost, good heat dissipation, and energy saving advantages.

Additional Learning Hub Resources 

Common Cisco Optical Module Models 

Common Models of Ruijie Optical Module 

Which Cat6, Cat6a, and Cat7 Ethernet cable is best for 10Gb? 

RJ45 Cable Overview