# Glossary

This glossary defines terms, abbreviations, and acronyms that apply directly to FCoE.

TERMS | DEFINITIONS
--- | ---
ARP | Address Resolution Protocol
Boot Targets | The server-side system in an FCoE SAN configuration. The FCoE Boot Target system hosts the FCoE target drives which are accessed by an FCoE Boot initiator.
CEE | Converged Enhanced Ethernet
Data Link Interface | Interface to the chip at the MAC layer.
DCB | Data Center Bridging
DCBX | DCB Exchange Protocol
DDP | Direct Data Placement
Descriptor Queues | Descriptor queues are used by software to submit work requests like send and receive and get completion status.
DLL | Dynamic Linked Libraries
DPT | Diamond Peak Technology
ETS | Enhanced Transmission Selection
FC | Fibre Channel
FCF | Fibre Channel Forwarder
FCoE | Fibre Channel over Ethernet
HBA | Host Bus Adapter
IPC | Inter Process Communication
IRP | IO Request Packet
iSCSI | Internet SCSI
LLDP | Link Layer Discovery Protocol, IEEE802.1AB
LUN | Logical Unit Number (LUN) is the identifier of a device which is being addressed by protocols such as Fibre Channel and iSCSI
MPA | Marker Based PDU Alignment. This protocol runs on top of TCP and provides framing and data integrity.
Native OS Stack | OS stack that represents a particular function implemented purely in software (e.g., native OS TCP/IP stack, native OS iSCSI stack).
Native TCP/IP Stack | TCP/IP stack implemented in software and provided as part of the operating system.
NFS | Network File System
NIC | Network Interface Controller
ODM | Offload Device Manager
Offload Stack | Components that make up the offload stack
OPS | Offload Protocol Switch
Packet Buffers | Packet buffers are hardware FIFOs that either receive or transmit packets. Each packet buffer can be associated with one or more traffic classes
PCI | Peripheral Components Interface
PDU | Protocol Data Unit
PFC | Priority Flow Control
Raw Packet Driver | Standard Ethernet MAC driver.
RDMA | Remote Direct Memory Access
RDMAC | RDMA Consortium
RSS | Receive Side Scaling is a mechanism for hardware to distribute receive packets to queues that are associated with a specific processor core and thereby distributing the processing load.
RX | Receive
SAN | Storage Area Network
SCSI | Small Computer System Interface
SNMP | Simple Network Management Protocol
TLV | Type Length Value
Transport Interface | Interface to the chip at the transport layer.
TX | Transmit
ULP | Upper Layer Protocol
VBD | Virtual Bus Driver. Driver that exposes two virtual physical Devices on a single physical device and enables sharing of LAN and SAN traffic on a common Ethernet port.
VFT | Virtual Fabric Tagging is a Fibre Channel defined extended frame header.
VMDq | Virtual Machine Device Queues
VLAN | Virtual LAN (VLAN) is a group of hosts with a common set of requirements that communicate as if they were attached to the same broadcast domain, regardless of their physical location.
VT | Vanderpool Technology, also known as Virtualization. VT is an Intel-wide effort to support multiple virtual platforms on a single physical platform. This requires both software and hardware support to implement efficiently.

`Last modified on 4/06/11 11:41a Revision 10`