User`s manual
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DWS-1008 User’s Manual
D-Link Systems, Inc.
Appendix D - Glossary
PoE
Power over Ethernet. A technology, dened 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 dene 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.
port address translation
See PAT.
Power over Ethernet
See PoE.
pre-master secret
A key generated during the handshake process in Transport Layer Security (TLS) protocol
negotiations and used to derive a master secret.
preshared key
See PSK.
PRF
Pseudorandom function. A function that produces effectively unpredictable output. A PRF can
use multiple iterations of one or more hash algorithms to achieve its output. The Transport
Layer Security (TLS) protocol denes a specic PRF for deriving keying material.
Privacy-Enhanced Mail
See PEM.
private key
In cryptography, one of a pair of keys, one public and one private, that are created with the
same algorithm for encrypting and decrypting messages and digital signatures. The private
key is provided to only the requestor and never shared. The requestor uses the private key
to decrypt text that has been encrypted with the public key by someone else. See also PKI;
public key.