Updated: 05/27/2017 by Computer Hope

spi definitionSPI may refer to any of the following:

1. Short for Stateful Packet Inspection, SPI, also known as stateful firewall, is a feature found in networking devices, like routers, that keeps track of the state of network connections. Keeping track of a connection's state allows the device to better filter unwanted or harmful network traffic.

2. Short for Serial Peripheral Interface, SPI bus is a serial data link coined by Motorola. It is a de facto standard, used with SD cards and sensors.

3. Short for System Packet Interface, SPI is set of interoperability agreements that specify packet operations on Ethernet applications and optical networking.

Bus, Firewall, Network terms, Packet, Security terms, Stateless