Reference Manual for the ProSafe VPN Firewall FVS318v3
8Glossary
January 2005
PPTP
Point-t o-Point T unneling Protocol. A method for establishing a virtual private network (VPN) by embedding
Microsoft’s network protocol into Internet packets.
Protocol
A set of rules for communication between devices on a network.
PSTN
Public Switched Telephone Network.

Q

QoS
See “Quality of Service”
Quality of Service
QoS is a networking term that specifies a guaranteed level of throughput. Throughput is the amount of data
transferred from one device to another or processed in a specified amount of time - typically , throughputs are
measured in bytes per second (Bps).

R

RADIUS
Short for Remote Authentication Dial-In User Service, RADIUS is an authentication system. Using
RADIUS, you must enter your user name and password before gaining access to a network. This
information is passed to a RADIUS server , which checks that the information is correct, and then authorizes
access. Though not an official standard, the RADIUS specification is maintained by a working group of the
IETF.
RFC
Request For Comment. Refers to documents published by the Internet Engineering Task Force (IETF)
proposing standard protocols and procedures for the Internet. RFCs can be found at www.ietf.org.
router
A device that forwards data between networks. An IP router forwards data based on IP source and
destination addresses.