Differentiate between I2C and SPI Protocol in Computer Network.

I2C Protocol

I2C stands for the inter-integrated controller. It is a serial communication protocol that can connect low-speed devices. It is a master-slave communication in which we can link and control multiple slaves from a single master. In this, each slave device has a specific address.

SPI Protocol

SPI is an interface that enables the serial (one bit at a time) exchange of data between two devices, one called a master, and the other called a slave. In this protocol, devices are linked in the master-slave relationship.

The major differences between I2C protocol and SPI protocol are as follows −

I2C ProtocolSPI Protocol
There are two bus lines required as a serial data line (SDA) and a serial clock line (SCL).Three bus lines are needed; a data input line (SI1), a data output line (SO1) and a serial clock line (SCK1) [plus 1 Chip Select (CS)].
It can support transfer speeds of around 100kHz (original standard, or 400kHz using the most recent standard)It is used at higher data rates (up to 10 MHz or more).
It is used to be more efficient in multi-master, multi-slave applications.It is used to be more efficient in point-to-point (single master, single slave) applications.
It is used for a built-in addressing scheme, and straightforward.It can lack built-in device addressing.
It is used for more overhead when handling point-to-point applications.It can take less overhead when running a point-to-point application.
It can be suited better for communication with onboard devices that are accessed on an occasional basis.It can be served better for applications that are naturally thought of as data streams.
It has an acknowledgement mechanism to confirm receipt of data.It does not have an acknowledgement mechanism to confirm receipt of data.