KVH Industries FB250, Руководство пользователя

Страница: 259 / 268

Glossary
248
PIN Personal Identification Number. A code number used to provide
access to a system that has restricted access.
PoE Power over Ethernet
POST Power On Self Test. A test sequence that runs every time the
system is powered up or reset.
PPPoE Point-to-Point Protocol over Ethernet. A network protocol for
encapsulating Point-to-Point Protocol (PPP) frames inside
Ethernet frames. By using PPPoE, users can virtually "dial" from
one machine to another over an Ethernet network, establish a
point to point connection between them and then securely
transport data packets over the connection.
PS Packet-Switched. Packet-switched networks move data in
separate, small blocks (packets) based on the destination address
in each packet.
PUK PIN Unblocking Key. An eight-digit code used to unblock a SIM
card after three incorrect PINs have been entered. The PUK code
is supplied with the SIM card.
Q
QoS Quality of Service
R
RDI Restricted Digital Information
RF Radio Frequency. Electromagnetic wave frequencies between
about 3 kilohertz and about 300 gigahertz including the
frequencies used for communications signals (radio, television,
cell-phone and satellite transmissions) or radar signals.