(1) Short for Serial Peripheral Interface, a full-duplex synchronous serial interface for connecting low-/medium-bandwidth external devices using four wires. SPI devices communicate using a master/slave relationship over two data lines and two control lines:
Master Out Slave In (MOSI): supplies the output data from the master to the inputs of the slaves.
Master In Slave Out (MISO): supplies the output data from a slave to the input of the master. It is important to note that there can be no more than one slave that is transmitting data during any particular transfer.
Serial Clock (SCLK): a control line driven by the master, regulating the flow of data bits.
Slave Select (SS): a control line that allows slaves to be turned on and off with hardware control.
(2) Short for System Packet Interface, a point-to-point interface standard, allows network equipment designers to develop an array of next-generation multi-service switches and routers to support multi-service traffic with aggregate bandwidths up to OC-192 (10 Gb/s) and beyond, enabling them to dramatically increase system performance. It is a family of Interoperability Agreements from the Optical Internetworking Forum (OIF) which include:
System Packet Interface Level 5 (SPI-5): OC-768 System Interface for Physical and Link Layer Devices. (OIF documentation)
System Packet Interface Level 4 (SPI-4) Phase 2: OC-192 System Interface for Physical and Link Layer Devices.(OIF documentation)
System Physical Interface Level 4 (SPI-4) Phase 1: A System Interface for Interconnection Between Physical and Link Layer, or Peer-to-Peer Entities Operating at an OC-192 Rate (10 Gb/s) (OIF documentation)
System Packet Interface Level 3: OC-48 System Interface for Physical and Link Layer Devices (OIF documentation)
- Serial Port
A port, or interface, that can be used for serial communication, in which only 1 bit is transmitted at a time. Most serial ports on personal computers conform to the RS-232C or RS-422 standards. A serial port is a general-purpose interface that can be used for almost any type of device, including modems, mice, and […]
The conversion of an object instance to a data stream of byte values in order to prepare it for transmission.
)A small decorative line added as embellishment to the basic form of a character. Typefaces are often described as being serif or sans serif (without serifs). The most common serif typeface is Times Roman. A common sans serif typeface is Helvetica.
- a Server
(ser´ver) (n.) A computer or device on a network that manages network resources. There are many different types of servers. For example: File server: a computer and storage device dedicated to storing files. Any user on the network can store files on the server. Print server: a computer that manages one or more printers, and […]
- server appliance
Also called an appliance server, a specialized server that is designed for ease of installation and maintenance. Server appliances have their hardware and software bundled in the product, so all applications are pre-installed. The appliance is plugged into an existing network and can begin working almost immediately, with little configuration. It is designed to run […]