3Com WX4400 3CRWX440095A, WXR100 3CRWXR10095A, WX1200 3CRWX120695A, WX2200 3CRWX220095A manual Pmk

GLOSSARY 693

	The PKI uses the digital certificate to identify an individual or an
	organization. The private key is given only to the requesting party and
	is never shared, and the public key is made publicly available (as part of
	the digital certificate) in a directory that all parties can access. You use
	the private key to decrypt text that has been encrypted with your
	public key by someone else. The certificates are stored (and, when
	necessary, revoked) by directory services and managed by a certificate
	management system. See also certificate authority (CA); registration
	authority (RA).
plenum	A compartment or chamber to which one or more air ducts are
	connected.
plenum-rated cable	A type of cable approved by an independent test laboratory for
	installation in ducts, plenums, and other air-handling spaces.
PMK	Pairwise master key. A code derived from a master secret and used as
	an encryption key for IEEE 802.11 encryption algorithms. A PMK is also
	used to derive a pairwise transient key (PTK) for IEEE 802.11i robust
	security. See also master secret; PTK.
PoE	Power over Ethernet. A technology, defined in the developing IEEE
	802.3af standard, to deliver DC power over twisted-pair Ethernet data
	cables rather than power cords. The electrical current, which enters the
	data cable at the power-supply end and comes out at the device end, is
	kept separate from the data signal so neither interferes with the other.
policy	A formal set of statements that define the way a network’s resources
	are allocated among its clients — individual users, departments, host
	computers, or applications. Resources are statically or dynamically
	allocated by such factors as time of day, client authorization priorities,
	and availability of resources.
Policy Manager	A 3Com Wireless Switch Manager (3WXM) feature that allows you to
	apply a collection of configuration settings known as a domain policy,
	or part of the policy, to one or more Wireless Switches (WXs). With
	Policy Manager, you can also merge some or all of the configuration
	changes you make to a single WX switch into a domain policy. See also
	domain policy.
port address	See PAT.
translation
Power over Ethernet	See PoE.