The term "throughput" typically refers to the amount of data that can be transmitted successfully over a network connection in a given time period. In the context of QSFP (Quad Small Form-Factor Pluggable), the throughput is influenced by the specific variant and the data rates it supports.

Here are some common QSFP variants and their associated throughputs:

1. QSFP (4x10G):

• Throughput: Up to 40 gigabits per second (Gbps)

• Configuration: 4 lanes, each operating at 10 Gbps

2. QSFP+ (4x25G):

• Throughput: Up to 100 gigabits per second (Gbps)

• Configuration: 4 lanes, each operating at 25 Gbps

3. QSFP28 (4x25G):

• Throughput: Up to 100 gigabits per second (Gbps)

• Configuration: 4 lanes, each operating at 25 Gbps

4. QSFP56 (4x50G):

• Throughput: Up to 200 gigabits per second (Gbps)

• Configuration: 4 lanes, each operating at 50 Gbps

5. QSFP-DD (8x25G):

• Throughput: Up to 200 gigabits per second (Gbps)

• Configuration: 8 lanes, each operating at 25 Gbps

It's important to note that QSFP modules support various data rates depending on the specific implementation and industry standards. The term "4x10G," for example, indicates that the module has four lanes, each capable of transmitting at 10 Gbps, resulting in a total throughput of 40 Gbps. Similarly, other variants like QSFP+ and QSFP28 follow similar naming conventions.

When selecting or discussing QSFP modules, it's crucial to consider the specific data rates supported by the module, as it directly impacts the overall throughput of the connection. Always refer to the module's datasheet or specifications for accurate information on supported data rates and configurations.