D-Link DWL-8500AP - AirPremier AG Wireless Switching 108 Dualband Access Point Administrator's Manual page 163

inspected by each node. The node to which it is
addressed is the ultimate recipient.
Packet Loss
Packet Loss describes the percentage of packets
transmitted over the network that did not reach their
intended destination. A 0 percent package loss
indicates no packets were lost in transmission.
features are designed to minimize packet loss.
PHY
The Physical Layer (PHY) is the lowest layer in the
network layer model (see OSI). The Physical Layer
conveys the bit stream - electrical impulse, light or
radio signal -- through the network at the electrical
and mechanical level. It provides the hardware
means of sending and receiving data on a medium,
including defining cables, NICs, and physical
aspects.
Ethernet and the 802.11
physical layer components.
PID
The Process Identifier (PID) is an integer used by
Linux to uniquely identify a process. A PID is
returned by the system call. It can be used by
fork()
or to perform actions on the given
wait() kill()
process.
Port Forwarding
Port Forwarding creates a 'tunnel' through a
firewall, allowing users on the Internet access to a
service running on one of the computers on your
LAN, for example, a Web server, an FTP or SSH
server, or other services. From the outside user's
point of view, it looks like the service is running on
the firewall.
PPP
The Point-to-Point Protocol is a standard for
transmitting network layer datagrams
over serial point-to-point links. PPP is designed to
operate both over asynchronous connections and bit-
oriented synchronous systems.
QoS
family are protocols with
(IP packets)
PPPoE
Point-to-Point Protocol over Ethernet (PPPoE) is a
specification for connecting the users on a
the Internet through a common broadband medium,
such as a single DSL or cable modem line.
PPtP
Point-to-Point Tunneling Protocol (PPtP) is a
technology for creating a Virtual Private Network
(VPN) within the Point-to-Point Protocol (PPP). It is
used to ensure that data transmitted from one VPN
node to another are secure.
Proxy
A proxy is server located between a client application
and a real server. It intercepts requests, attempting to
fulfill them itself. If it cannot, it forwards them to the
real server. Proxy servers have two main purposes:
improve performance by spreading requests over
several machines and filter requests to prevent access
to specific servers or services.
PSK
Pre-Shared Key (PSK), see
Public Key
A public key is used in public key cryptography to
encrypt a message which can only be decrypted with
the recipient's private or secret key. Public key
encryption is also called asymmetric encryption,
because it uses two keys, or Diffie-Hellman
encryption. Also see Shared
Q
QoS
Quality of Service (QoS) defines the performance
properties of a network service, including guaranteed
throughput, transit delay, and priority queues. QoS is
designed to minimize Latency, Jitter,
and network congestion, and provide a way of
allocating dedicated bandwidth for high priority
network traffic.
The IEEE standard for implementing QoS on
wireless networks is currently in-work by the
Glossary
LAN to
Shared Key.
Key.
Packet Loss,
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