ZyXEL Communications A-6000 manual Pns, Pop, Pots, Ppp, Pptp, Pvc

		A-6000 High Speed, Long Range Ethernet Wireless Bridge
Ping Attack	An attack that slows down the network until it is unusable. The attacker sends a
	"ping" command to the network repeatedly to slow it down. See also Denial of
	Service.
Pirate	Someone who steals or distributes software without paying the legitimate owner
	for it. This category of computer criminal includes several different types of
	illegal activities Making copies of software for others to use. Distributing pirated
	software over the Internet or a Bulletin Board System. Receiving or
	downloading illegal copies of software in any form.
Pirated Software	Software that has been illegally copied, or that is being used in violation of the
	software's licensing agreement. Pirated software is often distributed through
	pirate bulletin boards or on the Internet. In the internet underground it is known
	as Warez.
Plain Text	The opposite of Cipher Text, Plain Text is readable by anyone.
PNS	PPTP Network Server.	A PNS must have IP connectivity.
POP	Post Office Protocol. This is a common protocol used for sending, receiving,
	and delivering mail messages.
Port	An Internet port refers to a number that is part of a URL, appearing after a colon
	(:) right after the domain name. Every service on an Internet server listens on a
	particular port number on that server. Most services have standard port
	numbers, e.g. Web servers normally listen on port 80.
Port (H/W)	An interface on a computer for connecting peripherals or devices to the
	computer. A printer port, for example, is an interface that is designed to have a
	printer connected to it. Ports can be defined by specific hardware (such as a
	keyboard port) or through software.
POTS	Plain Old Telephone Service is the analog telephone service that runs over
	copper twisted-pair wires and is based on the original Bell telephone system.
	Twisted-pair wires connect homes and businesses to a neighborhood central
	office. This is called the local loop. The central office is connected to other
	central offices and long-distance facilities.
PPP	Point to Point Protocol.	PPP encapsulates and transmits IP (Internet Protocol)
	datagrams over serial point-to-point links. PPP works with other protocols such
	as IPX (Internetwork Packet Exchange). The protocol is defined in IETF
	(Internet Engineering Task Force) RFC 1661 through 1663. PPP provides
	router-to-router, host-to-router, and host-to-host connections.
PPTP	Point-to-Point Tunneling Protocol.
Promiscuous	Actively capturing packet information from a network. Most computers only
Packet Capture	collect packets specifically addressed to them. Promiscuous packet capture
	acquires all network traffic it can regardless of where the packets are
	addressed.
Protocol	A “language” for communicating on a network. Protocols are sets of standards
	or rules used to define, format, and transmit data across a network. There are
	many different protocols used on networks. For example, most web pages are
	transmitted using the HTTP protocol.
Proxy Server	A server that performs network operations in lieu of other systems on the
	network. Proxy Servers are most often used as part of a firewall to mask the
	identity of users inside a corporate network yet still provide access to the
	Internet. When a user connects to a proxy server, via a web browser or other
	networked application, he submits commands to the proxy server. The server
	then submits those same commands to the Internet, yet without revealing any
	information about the system that originally requested the information. Proxy
	servers are an ideal way to also have all users on a corporate network channel
	through one point for all external communications. Proxy servers can be
	configured to block certain kinds of connections and stop some hacks.
Public Key	System of encrypting electronic files using a key pair. The key pair contains a
Encryption	public key used during encryption, and a corresponding private key used during
	decryption.
PVC	Permanent Virtual Circuit. A PVC is a logical point-to-point circuit between
	customer sites. PVCs are low-delay circuits because routing decisions do not

CLI commands 5-5