The speed of a 1000BASE SFP (Small Form-factor Pluggable) module is 1 gigabit per second (Gbps). The "1000BASE" designation indicates that the module operates at a data rate of 1000 megabits per second, which is equivalent to 1 gigabit per second. These modules are commonly used for Gigabit Ethernet connections and are widely employed in networking equipment such as switches, routers, and network interface cards (NICs).

The term "1000BASE" is part of the IEEE 802.3 standard for Gigabit Ethernet, and it specifies various parameters, including the data rate, signaling, and media type. In the case of 1000BASE SFP modules, they support a data rate of 1 Gbps over various types of optical or copper cabling, depending on the specific SFP module and the networking environment.

It's worth noting that SFP modules can be used for various data rates, and the designation "1000BASE" specifically refers to the Gigabit Ethernet standard. If higher data rates are required, such as 10 Gbps or 25 Gbps, other types of SFP modules like 10GBASE or 25GBASE would be used.