
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
implement 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.
Power Over Ethernet is used to transmit electrical power, to remote devices over standard
Ethernet cable. It could for example be used for powering IP telephones, wireless LAN
access points and other equipment, where it would be difficult or expensive to connect the
equipment to main power supply.
Содержание WPoE-2426
Страница 8: ......
Страница 12: ...Publication date August 2012 Revision 1 0 Welltech Technology Co Ltd 2 WPoE 2426 web help function ...
Страница 14: ......