Security Solutions

Glossary
This glossary defines acronyms and terms used in this guide. It is not a comprehensive
glossary of computer terms.
A
ACL Access Control List. A list of permissions attached to an object. An ACL specifies which users or
system processes are granted access to objects, as well as what operations are allowed on given
objects. Each entry in a typical ACL specifies a subject and an operation.
B
BB_credit Buffer-to-buffer credits. A method used to determine how many frames can be sent to a recipient
when buffer to buffer flow control is in use. The credit is the maximum number of outstanding
frames that can be transmitted by an N_Port, NL_Port, or an F_Port without causing a buffer
overrun condition at the receiver.
C
C-Class
BladeSystem
A brand name used by HP for blade server chassis form factor for modular servers. Blade servers
are a modern form of server technology that have a more efficient design than conventional
servers, which cuts down on the excess components that are usually found in regular servers and
makes room for the implementation of components that will help with the specified needs. This
helps create more efficient use of physical space and energy. Blade servers are packaged as
ultra-high density components that can be used for a variety of services. The common uses include
servers, storage of data, and communication interfaces. Blades are racked inside blade enclosures,
which supply them with power, cooling, and networking.
D
DCB Data Center Bridging. A collection of standards designed to transform Ethernet into a lossless
network with efficient Layer 2 multipath forwarding. DCB, formerly called converged enhanced
Ethernet (CEE), depends on a handful of standards developed by three different standards bodies:
the American National Standards Institute, the Institute of Electrical and Electronics Engineers,
and the Internet Engineering Task Force (IETF). It is also known as Data Center Ethernet (DCE).
To meet SAN requirements for guaranteed packet delivery, Ethernet controllers implement DCB,
a set of IEEE industry standards that delivers end-to-end congestion notification and quality of
service throughout the network which allows customers to configure traffic classes and priorities
to deliver a lossless Ethernet fabric. DCB includes the following protocols: IEEE 802.1Qau (CN),
IEEE 802.1Qaz (ETS and DCBX), and IEEE 802.1Qbb (PFC).
DCBX Data Center Bridging Capability eXchange. A discovery and capability exchange protocol that
is used for conveying capabilities and configuration of the DCB features between neighbors to
ensure consistent configuration across the network. This protocol leverages the functionality
provided by IEEE 802.1AB (LLDP). It is included in the 802.1az standard.
E
E_Port Extension port. Fibre Channel switch ports which provide direct switch-to-switch connections within
the fabric. The Expansion port within a Fibre Channel switch or a bridge device through an
inter-switch link. The data forwarding component of an FC entity that emulates an E-Port and is
dynamically instantiated on successful completion of an ELP Exchange.
ENode FCoE Node. A Fibre Channel node with one or more lossless Ethernet MACs, each coupled with
an FCoE controller.
ETS Enhanced Transmission Selection. A DCB feature that allows allocation of bandwidth on a NIC
to applications based on their DCB priority. The DCB priority is a VLAN header with a 3 bit
priority field. The priority field's value differentiates Ethernet packets in the network. DCB uses
the priority value, also called the 802.1p priority, to associate traffic with other DCB properties
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