Allworx PowerFlex P810, User Manual

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PowerFlex
8/24/48 Port GbE PoE Managed Switch User’s Guide
Term Definition
POP3 is designed to delete mail on the server as soon as the user has
downloaded it. However, some implementations enable 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. Consider IMAP as a remote file
server.
POP and IMAP deal with the receiving of e-mail. Do not with the Simple Mail
Transfer Protocol (SMTP). Send e-mail with SMTP, and a mail handler
receives it on the recipient's behalf. Then the mail is read using POP or IMAP.
IMAP4 and POP3 are the two most prevalent Internet standard protocols for
e-mail retrieval. Virtually all modern e-mail clients and servers support both.
Private LAN
In a private VLAN, communication between ports in that private VLAN is not
permitted. A VLAN can be configured as a private VLAN.
PTP
An acronym for Precision Time Protocol, a network protocol for synchronizing
the clocks of computer systems.
Q
QCE
An acronym for QoS Control Entry. It describes QoS class associated with a
particular QCE ID.
There are six QCE frame types: Ethernet Type, VLAN, UDP/TCP Port, DSCP,
TOS, and Tag Priority. Frames can be classified by one of 4 different QoS
classes: "Low", "Normal", "Medium", and "High" for individual application
QCL
An acronym for QoS Control List. It is the list table of QCEs, containing QoS
control entries that classify to a specific QoS class on specific traffic objects.
Each accessible traffic object contains an identifier to its QCL. The privileges
determine specific traffic object to specific QoS class.
QL
In SyncE this is the Quality Level of a given clock source. This is received on
a port in a SSM indicating the quality of the clock received in the port.
QoS
An acronym for Quality of Service. It is a method to guarantee a bandwidth
relationship between individual applications or protocols.
A communications network transports a multitude of applications and data,
including high-quality video and delay-sensitive data such as real-time voice.
Networks must provide secure, predictable, measurable, and sometimes
guaranteed services.
Achieving the required QoS becomes the secret to a successful end-to-end
business solution. Therefore, QoS is the set of techniques to manage network
resources
R
RARP
An acronym for Reverse Address Resolution Protocol. It is a protocol that is
used to obtain an IP address for a given hardware address, such as an
Ethernet address. RARP is the complement of ARP.
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Revised: October 30, 2013
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