DAC 100Gb/s Cable: High-Speed Direct Attach Solution for Data Center Networks
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With the continuous development of cloud computing, artificial intelligence, high-performance computing, and enterprise digital infrastructure, data centers are facing increasing demands for higher bandwidth, lower latency, and more efficient network connections. Reliable interconnection between servers, switches, and storage systems has become a key factor affecting overall network performance.
The DAC 100Gb/s Cable is designed to meet the requirements of short-distance high-speed data transmission. By using direct copper connection technology, it provides excellent signal stability, low power consumption, and easy deployment advantages, making it an ideal choice for rack-level and cabinet-level networking applications.
Compared with traditional optical solutions, Direct Attach Copper (DAC) cables offer a cost-effective solution for short-reach connections where high bandwidth, low energy consumption, and simplified installation are important considerations.
What Is a DAC 100Gb/s Cable?
A Direct Attach Copper cable (DAC) is a high-speed copper interconnection solution that connects network devices directly through integrated connectors on both ends. Unlike optical transceiver solutions, DAC cables do not require separate optical modules, which helps reduce system complexity and power consumption.
The DAC 100Gb/s Cable typically uses QSFP28 interfaces and supports transmission speeds up to 103.1Gb/s. It is widely used for connecting switches, servers, storage systems, and other high-performance networking equipment.
Designed according to major industry standards, DAC cables support:
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QSFP28 MSA specification
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IEEE 802.3 standards
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SFF-8665 specification
These standards ensure compatibility with various networking platforms and provide flexible deployment options for modern data centers.
The cable is generally available in transmission distances from 1 meter to 5 meters, making it suitable for short-distance applications inside racks or between adjacent network cabinets.
Key Advantages of DAC 100Gb/s Cable
High-Speed Data Transmission
The primary advantage of the DAC 100Gb/s Cable is its ability to support large-scale data transmission with low latency.
With data rates up to 103.1Gb/s, DAC cables can support bandwidth-intensive applications including:
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Cloud computing
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Artificial intelligence servers
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Machine learning systems
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Big data analytics
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High-performance computing
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Enterprise storage networks
High-speed connectivity helps improve communication efficiency between servers and switches while reducing network bottlenecks.
Low Power Consumption
Energy efficiency is becoming increasingly important in modern data center design. Compared with optical solutions requiring optical-electrical conversion components, DAC cables consume less power by using direct copper transmission.
Low power consumption helps data centers:
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Reduce energy costs
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Improve heat management
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Lower cooling requirements
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Increase overall system efficiency
For large-scale network deployments, these advantages can significantly improve operational performance.
Easy Installation and Maintenance
The hot-pluggable QSFP28 design allows engineers to install or replace cables quickly without interrupting network operation.
Benefits include:
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Faster deployment
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Simplified maintenance
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Reduced downtime
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Easier network upgrades
This makes DAC cables especially suitable for rapidly expanding data center environments.
Applications of DAC 100Gb/s Cable
Server-to-Switch Connections
Modern servers require high-speed connections to access computing resources and storage systems. The DAC 100Gb/s Cable provides reliable connections for:
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Servers and top-of-rack switches
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Storage devices and network switches
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Compute nodes and aggregation equipment
Its short transmission distance and compact structure make it ideal for high-density rack environments.
Artificial Intelligence and High-Performance Computing
AI workloads and high-performance computing systems generate massive amounts of data that require fast communication between computing nodes.
DAC 100Gb/s solutions support applications such as:
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AI training platforms
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Scientific computing
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Simulation systems
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Research clusters
The combination of high bandwidth and low latency improves data processing efficiency.
Cloud Storage Networks
Cloud service providers require stable connections between storage servers, switches, and processing systems.
The DAC 100Gb/s Cable helps create efficient storage network infrastructures by providing:
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Reliable signal transmission
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High-speed connectivity
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Low power operation
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Simple deployment
Enterprise Data Centers
Enterprises upgrading their network infrastructure can use DAC cables for:
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Private cloud environments
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Virtualization platforms
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Database systems
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Backup networks
They provide an economical solution for short-distance high-speed connections.
Available DAC Cable Configurations
Different network architectures require different connection methods. The DAC 100Gb/s Cable series provides multiple configurations for flexible deployment.
QSFP28 to QSFP28 DAC Cable
The QSFP28-100G-CU series enables direct connection between two QSFP28 ports.
Common options include:
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1-meter QSFP28 to QSFP28 Twinax Copper Cable
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2-meter QSFP28 to QSFP28 Twinax Copper Cable
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3-meter Passive Copper Direct Attach Cable
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5-meter Copper Direct Attach Cable
This configuration is commonly used for direct connections between 100G switches and network equipment.
QSFP28 to 4×SFP28 DAC Cable
For networks requiring a connection between 100G QSFP28 ports and multiple 25G SFP28 ports, breakout DAC cables provide an efficient solution.
Typical applications include:
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100G switch to four 25G server connections
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Data center network migration
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High-density server deployment
Available lengths include 1m, 2m, 3m, and 5m.
Reliable Performance for Data Center Environments
Network stability is critical for continuous operation. High-quality DAC cables need to maintain consistent performance under long-term usage.
The DAC 100Gb/s Cable supports:
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Commercial temperature operation
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RoHS compliance
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Digital diagnostic monitoring
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QSFP28 compatibility
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IEEE standard compliance
The operating temperature range is typically -5°C to 70°C, meeting the requirements of standard data center environments.
Digital diagnostic functions allow network engineers to monitor cable status and improve maintenance efficiency.
DAC Cable vs Optical Cable
When selecting high-speed network interconnection products, DAC cables are often compared with optical solutions.
For short-distance applications, DAC cables provide advantages including:
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Lower power consumption
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Lower overall cost
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Easier installation
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Reduced system complexity
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Stable signal performance
Optical cables are generally preferred for longer transmission distances, while DAC cables are more suitable for connections within racks or nearby cabinets.
The final choice depends on transmission distance, network architecture, power requirements, and application environment.
Selecting a Reliable DAC 100Gb/s Cable Manufacturer
Choosing an experienced supplier is important for ensuring product quality and network reliability.
Professional communication manufacturers usually provide a complete range of interconnection products, including DAC cables, AOC cables, optical transceiver modules, MPO/MTP high-density cables, and customized solutions.
A complete product portfolio may include:
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SFP
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SFP+
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SFP28
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QSFP+
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QSFP28
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QSFP56
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QSFP-DD
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OSFP
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CFP series
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High-speed DAC and AOC solutions
These products are widely used in:
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Data centers
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Cloud computing networks
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Telecommunications systems
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Enterprise networks
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High-performance computing platforms
OEM and ODM services are also available for customers requiring customized cable solutions.
Conclusion
As data center bandwidth requirements continue to increase, selecting the right network interconnection solution is essential for improving efficiency and reliability.
The DAC 100Gb/s Cable provides an effective solution for short-distance high-speed networking by combining high bandwidth, low power consumption, easy installation, and reliable performance.
With QSFP28 compatibility and transmission speeds up to 103.1Gb/s, DAC cables are widely used in cloud computing, AI infrastructure, storage systems, enterprise networks, and high-performance computing environments.
For organizations looking to build efficient and scalable data center networks, DAC 100Gb/s technology offers a practical and reliable connectivity option.
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Infinol Technology (shenzhen) Co., Ltd
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