User manual

Publication date: Feb., 2013
Revision A3
271
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 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 like CC and RDI is based on this
Optional TLVs.
A LLDP frame contains multiple TLVs
For some TLVs it is configurable if the switch shall 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 which 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).
PING
Ping is a program that sends a series of packets over a network or the Internet to a specific
computer in order to generate a response from that computer. The other computer responds
with an acknowledgment that it received the packets. Ping was created to verify whether a
specific computer on a network or the Internet exists and is connected.
Ping uses Internet Control Message Protocol (ICMP) packets. The PING Request is the
packet from the origin computer, and the PING Reply is the packet response from the target.
PoE
PoE is an acronym for Power over Ethernet.