HP StorageWorks 2/64 HP StorageWorks Fabric OS 5.x Master Glossary (AA-RW7NA-T - Page 24

port name A user-defined alphanumeric name for a port. port_name The unique identifier assigned to a Fibre Channel port. Communicated during login and port discovery. port swapping The ability to redirect a failed port to another port. This feature is available in Fabric OS 4.1.0 and later. POST Power-on self-test. A series of diagnostic tests run by a switch after it is turned on. PPID A unique static identifier for each blade in a bladed server. It resides on a printed label and on an electronic tag on the card. PPP Point-to-Point Protocol. The most popular method for transporting IP packets over a serial link between a user and an ISP. primary FCS Relates to the Secure Fabric OS feature. The primary fabric configuration server switch actively manages security and configurations for all switches in the fabric. See also backbone fabric, FCS, and backup FCS. primitive sequence An ordered set that is transmitted repeatedly and continuously. Primitive sequences are transmitted to indicate specific conditions within or conditions encountered by the receiver logic of an FC_Port. See also OLS and NOS. primitive signals An ordered set that indicates actions or events and requires just one occurrence to trigger a response. IDLE and R_RDY are used in all three topologies: ARB, OPN, and CLS. MRK is used in arbitrated loop. principal switch The first switch to boot up in a fabric. Ensures unique domain IDs among roles. private device A device that supports arbitrated-loop protocol and can interpret 8-bit addresses but cannot log in to the fabric. private key The secret half of a key pair. See also key, key pair, PKI, and public key cryptography. private loop An arbitrated loop that does not include a participating FL_Port. private loop device A device that supports a loop and can understand 8-bit addresses but does not log in to the fabric. private NL_Port An NL_Port that communicates only with other private NL_Ports in the same loop and does not log in to the fabric. protocol A defined method and set of standards for communication. Determines the type of error checking, the data-compression method, how sending devices indicate an end of message, and how receiving devices indicate receipt of a message. pstate Port State Machine. PSU Power supply unit. An electrical system that converts AC current from the wall outlet to the DC current required by the computer circuitry. public device A device that supports arbitrated-loop protocol, can interpret 8-bit addresses, and can log in to the fabric. public key The public half of a key pair. See also key, key pair, PKI, private key, and public key cryptography. public key cryptography A type of cryptography that uses a key pair, with the two keys in the pair called at different points in the algorithm. The sender uses the recipient's public key to encrypt the message, and the recipient uses the recipient's private key to decrypt it. See also key pair, PKI, private key, and public key. 24 Glossary