User guide

176 WatchGuard Firebox X Edge
IKE (Internet Key Exchange)
A protocol used with IPSec virtual private networks. Automates the process of
negotiating keys, changing keys, and determining when to change keys.
implicit trust
A condition reserved for pairs located on a local keyring. If the private portion of
a key pair is found on a user’s keyring, PGP assumes that user is the owner of
the key pair and implicitly trusts himself or herself.
initialization vector
A block of arbitrary data that serves as the starting point for a block cipher
using a chaining feedback mode. See also
cipher block chaining .
initialize
To prepare a disk for information storage.
installation wizard
A wizard specifically designed to guide a user through the process of installing
software. See
wizard .
integrity, data integrity
Assurance that data is not modified by unauthorized persons during storage or
transmittal.
interface
A boundary across which two independent systems meet and act on or
communicate with each other. The term generally refers to a hardware
interface—the wires, plugs, and sockets that hardware devices use to
communicate with each other.
Internet address class
To efficiently administer the 32-bit IP address class space, IP addresses are
separated into three classes that describe networks of varying sizes:
Class A —If the first octet of an IP address is less than 128, it is a Class A address.
A network with a Class A address can have up to about 16 million hosts.
Class B —If the first octet of an IP address is from 128 to 191, it is a Class B
address. A network with a Class B address can have up to 64,000 hosts.
Class C —If the first octet of an IP address is from 192 to 223, it is a Class C
address. A network with a Class C address can have up to 254 hosts.
Internet Engineering Task Force (IETF)
A large, open international community of network designers, operators, vendors,
and researchers concerned with the evolution of the Internet architecture and
the smooth operation of the Internet.
intranet
A self-contained network that uses the same communications protocols and file
formats as the Internet.