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NetBIOS is an acronym for Network Basic Input/Output System. It is a program that
allows applications on separate computers to communicate within a Local Area Network
(LAN), and it is not supported on a Wide Area Network (WAN).
The NetBIOS gives each computer in the network both a NetBIOS name and an IP
address corresponding to a different host name, and provides the session and transport
services described in the Open Systems Interconnection (OSI) model.
NFS
NFS is an acronym for Network File System. It allows hosts to mount partitions on a
remote system and use them as though they are local file systems.
NFS allows the system administrator to store resources in a central location on the
network, providing authorized users continuous access to them, which means NFS
supports sharing of files, printers, and other resources as persistent storage over a
computer network.
NTP
NTP is an acronym for Network Time Protocol, a network protocol for synchronizing the
clocks of computer systems. NTP uses UDP (datagrams) as the transport layer.
O
OAM
OAM is an acronym for Operation Administration and Maintenance.
It is a protocol described in ITU-T Y.1731 used to implement carrier Ethernet functionality.
MEP functionality such as CC and RDI is based on this.
Optional TLVs.
A LLDP frame contains multiple TLVs.
For some TLVs, it is configurable if the switch will include the TLV in the LLDP frame.
These TLVs are known as optional TLVs. If an optional TLVs is disabled the
corresponding information is not included in the LLDP frame.
OUI
OUI is the organizationally unique identifier. An OUI address is a globally unique identifier
assigned to a vendor by IEEE. You can determine which vendor a device belongs to
according to the OUI address that forms the first 24 bits of a MAC address.
P
PCP
PCP is an acronym for Priority Code Point. It is a 3-bit field storing the priority level for the
802.1Q frame. It is also known as User Priority.
PD
PD is an acronym for Powered Device. In a PoE system, the power is delivered from a
PSE (power sourcing equipment) to a remote device. The remote device is called a PD.
PHY
PHY is an abbreviation for Physical Interface Transceiver and is the device that
implements the Ethernet physical layer (IEEE 802.3).