IPsec
Internet Protocol security. IPsec is a protocol suite for secure IP communications that authenticates and
encrypts each IP packet in a communication session.
IPSG
Internet Protocol Source Guard. IPSG restricts IP address from untrusted interface by filtering traffic based on
list of addresses in the DHCP binding database or manually configured IP source bindings. It prevents IP
spoofing attacks.
IrDA
An industry-sponsored organization set up in 1993 to create international standards for the hardware and
software used in infrared communication links. In this special form of radio transmission, a focused ray of
light in the infrared frequency spectrum, measured in terahertz (THz), or trillions of hertz (cycles per second),
is modulated with information and sent from a transmitter to a receiver over a relatively short distance.
ISAKMP
Internet Security Association and Key Management Protocol. ISAKMP is used for establishing Security
Associations and cryptographic keys in an Internet environment.
ISP
Internet Service Provider. An ISP is an organization that provides services for accessing and using the
Internet.
JSON
JavaScript Object Notation. JSON is an open-standard, language-independent, lightweight data-interchange
format used to transmit data objects consisting of attribute–value pairs. JSON uses a "self-describing" text
format that is easy for humans to read and write, and that can be used as a data format by any programming
language.
Kbps
Kilobits per second.
KBps
Kilobytes per second.
keepalive
Signal sent at periodic intervals from one device to another to verify that the link between the two devices is
working. If no reply is received, data will be sent by a different path until the link is restored. A keepalive can
also be used to indicate that the connection should be preserved so that the receiving device does not
consider it timed out and drop it.
L2TP
Layer-2 Tunneling Protocol. L2TP is a networking protocol used by the ISPs to enable VPN operations.
AOS-W 6.5.3.x | User Guide Glossary of Terms | 1136
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