Freedom9 freeGuard Blaze 2100, Руководство пользователя

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G L O S S A R Y
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Security Appliance User Guide Version 3R2
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Internet is used as a way to share information including e-mail, files, and
newsgroups.
Internet Key Exchange (IKE): A method used to exchange keys to
encrypt and authenticate data over an unsecured medium, such as the
Internet.
Internet Protocol (IP): Protocol that specifies the format for a packet,
also called a datagram. Datagrams are commonly used in
connectionless, best-effort delivery systems like the Internet. IP defines
how information is passed between systems across a network.
IP Address: A32-bit numeric address with four spaces, usually
separated by a period, that identifies a node or network device. An IP
address can be a combination of four numbers from 0 through 255. For
example, 172.16.31.2 represents an IP address.
IP Security (IPsec): A set of protocols developed by the Internet
Engineering Task Force (IETF) to enable secure exchange at the IP level.
The most common implementation of IPsec is seen in virtual private
network (VPN) deployments. IPsec enables VPNs to take advantage of
authentication, integrity, and confidentiality.
Internet Security Association and Key Management Protocol
(ISAKMP):
Protocol that uses a common framework to provide
information about Security Association (SA) attributes. These include the
negotiation, modification, and deletion of SA.
Local Area Network (LAN): Any network technology that connects
multiple machines in a local office or building. LAN networks usually
consist of a main connection point like a switch or hub and enable all
machines on that segment to communicate. LAN networks have a limited
range of around 1,640 feet or 500 meters.
Man in the Middle Attack (MTM): Incident allowing a “hacker” to
read, insert, and modify all messages between two parties without the
parties knowing their link was compromised. The attacker must have the
ability to observe and intercept all messages going between the two
victims.
Maximum Transmission Unit (MTU): The largest physical packet size,
measure in bytes that a network can transmit. Any messages larger than
the MTU divide into smaller packets before being sent.