Allworx PowerFlex P810, Руководство пользователя

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PowerFlex
8/24/48 Port GbE PoE Managed Switch User’s Guide
Term Definition
NTP
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
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
An acronym for Organizationally Unique Identifier. An OUI address is a
globally unique identifier assigned to a vendor by IEEE. Users 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
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
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
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 aAn 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
An acronym for Post Office Protocol version 3. It is a protocol for email clients
to retrieve email messages from a mail server.
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Revised: October 30, 2013
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