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P
PCM
PCM (Pulse Code Modulation) is a technique for
converting analog audio signals into digital form for
transmission.
PING
Packet Internet Groper, a utility used to determine
whether a specific IP address is accessible. It functions
by sending a packet to the specified address and waits
for a reply. It is primarily used to troubleshoot Internet
connections.
PPPoE
Point-to-Point Protocol over Ethernet. PPPoE is a
specification for connecting the users on an Ethernet to
the Internet through a common broadband medium, such
as DSL or cable modem. All the users over the Ethernet
share a common connection.
Protocol
Communication on the network is governed by sets of
rules called protocols. Protocols provide the guidelines
devices use to communicate with each other, and thus
they have different functions. Some protocols are
responsible for formatting and presenting and presenting
data that will be transferred from file server memory to
the file server’s net work adapter Others are responsible
for filtering information between networks and forwarding
data to its destination. Still other protocols dictate how
data is transferred across the medium, and how servers
respond to workstation requests and vice versa.
Common network protocols responsible for the
presentation and formatting of data for a network
operating system are the Internetwork Packet Exchange
(IPX) protocol or the Internet Protocol (IP). Protocols that
dictate the format of data for transferors the medium
include token-passing and Carrier Sense Multiple Access
with Collision Detection (CSMA/CD), implemented as
token-ring, ARCNET, FDDI, or Ethernet. The Router
Information Protocol (RIP),a part of the Transmission
Control Protocol/Internet Protocol (TCP/IP) suite,
forwards packets from one network to another using the
same network protocol.