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Open Systems Interconnection is the reference model for how data should travel
between two devices on a network
OSPF
Open Shortest Path First is a routing protocol that is used more than RIP in larger scale
networks because only changes to the routing table are sent to all the other APs in the
network as opposed to sending the entire routing table at a regular interval, which is how
RIP functions
P
Password
A sequence of characters that is used to authenticate requests to resources on a
network
Personal Area Network
The interconnection of networking devices within a range of 10 meters
Physical layer
The first layer of the OSI model. Provides the hardware means of transmitting electrical
signals on a data carrier
Ping
A utility program that verifies that a given Internet address exists and can receive
messages. The utility sends a control packet to the given address and waits for a
response.
PoE
Power over Ethernet is the means of transmitting electricity over the unused pairs in a
category 5 Ethernet cable
Port
A logical channel endpoint in a network. A computer might have only one physical
channel (its Ethernet channel) but can have multiple ports (logical channels) each
identified by a number.
PPP
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Point-to-Point Protocol is used for two computers to communicate with each over a serial
interface, like a phone line