Manufacture Technology GEFXL2-CSW28KX User Manual page 304

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.
Policer
A policer can limit the bandwidth of received frames. It is located in front of the ingress
queue.
POP3
POP3 is an acronym for Post Office Protocol version 3. It is a protocol for email clients to
retrieve email messages from a mail server.
POP3 is designed to delete mail on the server as soon as the user has downloaded it.
However, some implementations allow users or an administrator to specify that mail be
saved for some period of time. POP can be thought of as a "store-and-forward" service.
An alternative protocol is Internet Message Access Protocol (IMAP). IMAP provides the
user with more capabilities for retaining e-mail on the server and for organizing it in
folders on the server. IMAP can be thought of as a remote file server.
294 Publication date: March, 2012
Revision A1