Technical data

Glossary-11
PCM Pulse-code modulation. A standard method of encoding analog audio signals in digital form.
Performance
Monitoring
A Brocade SilkWorm switch feature that monitors port traffic and includes frame counters, SCSI read
monitors, SCSI write monitors, and other types of monitors.
phantom
device
A device that is not physically in an arbitrated-loop but is logically included through the use of a
phantom address.
phantom
domain
See xlate domain.
PID Port identifier. See also core PID.
PKI Public key infrastructure. An infrastructure that is based on public key cryptography and CA (certificate
authority) and that uses digital certificates. See also digital certificate.
PKI
certification
utility
Public key infrastructure certification utility. A utility that makes it possible to collect certificate
requests from switches and to load certificates to switches. See also digital certificate, PKI.
PLOGI Port login. The port-to-port login process by which initiators establish sessions with targets. See also
FLOGI.
port In a Brocade SilkWorm switch environment, an SFP or GBIC receptacle on a switch to which an optic
cable for another device is attached.
port address In Fibre Channel technology, the port address is defined in hexadecimal. In the Brocade Fabric OS, a
port address can be defined by a domain and port number combination or by area number. In an ESCON
Director, an address used to specify port connectivity parameters and to assign link addresses for
attached channels and control units.
port name A user-defined alphanumeric name for a port.
port swapping Port swapping is the ability to redirect a failed port to another port. This feature is available in Fabric
OS v4.1.0 and higher.
port_name The unique identifier assigned to a Fibre Channel port. Communicated during login and port discovery.
POST Power-on self-test. A series of tests run by a switch after it is turned on.
primary FCS
switch
Relates to the Brocade 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 switch.
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.