Technical data

Glossary-24 Brocade SilkWorm 4100 Hardware Reference Manual
Publication Number: 53-0000563-02
public key The public half of a key pair. See also key, key pair.
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.
public loop An arbitrated loop that includes a participating FL_Port and can contain both public and private
NL_Ports.
public NL_Port An NL_Port that logs in to the fabric, can function within either a public or a private loop, and can
communicate with either private or public NL_Ports.
Q
QLA A type of Fibre Channel controller.
QLFA QuickLoop Fabric Assist. Arbitrated-loop technology.
QoS Quality of service.
quad A group of four adjacent ports that share a common pool of frame buffers.
queue A mechanism for each AL_PA address that allows for collecting frames prior to sending them to the
loop.
QuickLoop A Brocade software product that allows multiple ports on a switch to create a logical loop. Devices
connected via QuickLoop appear to each other as if they are on the same arbitrated loop.
QuickLoop
Mode
Allows initiator devices to communicate with private or public devices that are not in the same loop.
R
R_A_TOV Resource allocation timeout value. The maximum time a frame can be delayed in the fabric and still be
delivered. See also E_D_TOV, RR_TOV.
R_CTL Route control. The first 8 bits of the header, which defines the type of frame and its contents.
R_RDY Receiver ready. A primitive signal indicating that the port is ready to receive a frame.
R_T_TOV Receiver transmitter timeout value, used by receiver logic to detect loss of synchronization between
transmitters and receivers.
radius The greatest "distance" between any edge switch and the center of a fabric. A low-radius network is
better than a high-radius network.
RAID Redundant array of independent disks. A collection of disk drives that appear as a single volume to the
server and are fault tolerant through mirroring or parity checking. See also JBOD.
RAIT Redundant array of independent tapes.