CertiGuide to Network+  9  Glossary

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IP address

A 32-bit address used to identify a node on an IP internetwork. Each node on the IP internetwork must be assigned a unique IP address, which is made up of the network ID, plus a unique host ID.

This address is typically represented with the decimal value of each octet separated by a period (for example, 192.168.7.27).

Waits for incoming connections forwarding them to another machine or starting a local server program.

A system connected to multiple physical TCP/IP networks that can route or deliver IP packets between the networks.

Command line interface for revealing the current configuration of a PC.

Internet Protocol Next Generation. As of this writing, IP (version 4) is almost completely exhausted of mathematical permutations to assign unique numbers. Many LAN environments use private IP numbers which are hidden behind a proxy, one of several work-a-rounds designed to deal with the unique number shortage. IP Version 6, A.K.A. IPNG utilizes a 32-bit addresses scheme along with Base 16 (0-F) greatly enhancing the number of mathematical possibilities in IP.

Unique name (using numbers) for devices (hosts) on the Internet. IPv4 uses 32 Base 2 bits; IPv6 (IPNG) uses 128 Base 16 bits.

Refer to interrupt.

A driver that uses the IP Filter List from the active IPSec policy to watch for outbound IP packets that must be secured and inbound IP packets that need to be verified and decrypted.

A part of IPSec security rules that make up an IPSec security policy. IPSec filters determine whether a data packet needs an IPSec action and what the IPSec action is, such as permit, block, or secure. Filters can classify traffic by criteria including source IP address, source subnet mask, destination IP address, IP protocol type, source port, and destination port. Filters are not specific to a network interface.

Rules contained in the IPSec policy that govern how and when an IPSec is invoked. A rule triggers and controls secure communication when a particular source, destination, or traffic type is found. Each IPSec policy may contain one or many rules; any of which may apply to a particular packet. Default rules are provided which encompass a variety of clients and server-based communications or rules can be modified to meet custom requirements.

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