User`s guide

Glossary 373
Enterprise Network A geographically dispersed
network under the auspices of one organization.
Entity In general, a real or existing thing from the
Latin ens, or being, which makes the distinction
between a thing's existence and it qualities. In
programming, engineering and probably many
other contexts, the word is used to identify units,
whether concrete things or abstract ideas, that
have no ready name or label.
ESCON Enterprise System Connection
Exchange A group of sequences which share a
unique identifier. All sequences within a given
exchange use the same protocol. Frames from
multiple sequences can be multiplexed to prevent
a single exchange from consuming all the
bandwidth. See also: Sequence
F_Node Fabric Node - a fabric attached node.
F_Port Fabric Port - a port used to attach a Node
Port (N_Port) to a switch fabric.
Fabric Fibre Channel employs a fabric to connect
devices. A fabric can be as simple as a single
cable connecting two devices. The term is most
often used to describe a more complex network
utilizing hubs, switches and gateways.
Fabric Login Fabric Login (FLOGI) is used by an
N_Port to determine if a fabric is present and, if
so, to initiate a session with the fabric by
exchanging service parameters with the fabric.
Fabric Login is performed by an N_Port following
link initialization and before communication with
other N_Ports is attempted.
FC Fibre Channel
FC-0 Lowest level of the Fibre Channel Physical
standard, covering the physical characteristics of
the interface and media
FC-1 Middle level of the Fibre Channel Physical
standard, defining the 8B/10B encoding/decoding
and transmission protocol.
FC-2 Highest level of the Fibre Channel Physical
standard, defining the rules for signaling protocol
and describing transfer of frame, sequence and
exchanges.
FC-3 The hierarchical level in the Fibre Channel
standard that provides common services such as
striping definition.
FC-4 The hierarchical level in the Fibre Channel
standard that specifies the mapping of
upper-layer protocols to levels below.
FCA Fiber Channel Association.
FC-AL Fibre Channel Arbitrated Loop - A
reference to the Fibre Channel Arbitrated Loop
standard, a shared gigabit media for up to 127
nodes, one of which may be attached to a switch
fabric. See also: Arbitrated Loop.
FC-CT Fibre Channel common transport protocol
FC-FG Fibre Channel Fabric Generic - A
reference to the document (ANSI X3.289-1996)
which defines the concepts, behavior and
characteristics of the Fibre Channel Fabric along
with suggested partitioning of the 24-bit address
space to facilitate the routing of frames.
FC-FP Fibre Channel HIPPI Framing Protocol - A
reference to the document (ANSI X3.254-1994)
defining how the HIPPI framing protocol is
transported via the fibre channel
FC-GS Fibre Channel Generic Services -A
reference to the document (ANSI X3.289-1996)
describing a common transport protocol used to
communicate with the server functions, a full
X500 based directory service, mapping of the
Simple Network Management Protocol (SNMP)
directly to the Fibre Channel, a time server and
an alias server.
FC-LE Fibre Channel Link Encapsulation - A
reference to the document (ANSI X3.287-1996)
which defines how IEEE 802.2 Logical Link
Control (LLC) information is transported via the
Fibre Channel.
FC-PH A reference to the Fibre Channel Physical
and Signaling standard ANSI X3.230, containing
the definition of the three lower levels (FC-0,
FC-1, and FC-2) of the Fibre Channel.
FC-PLDA Fibre Channel Private Loop Direct
Attach - See PLDA.
FC-SB Fibre Channel Single Byte Command
Code Set - A reference to the document (ANSI