Dell W-IAP103 Guide de l'utilisateur télécharger pdf (Page 574)

Term Definition

AP An access point (AP) connects users to other users within the network and

also can serve as the point of interconnection between the WLAN and a

fixed wire network. The number of access points a WLAN needs is

determined by the number of users and the size of the network.

access point mapping The act of locating and possibly exploiting connections to WLANs while

driving around a city or elsewhere. To do war driving, you need a vehicle,

a computer (which can be a laptop), a wireless Ethernet card set to work in

promiscuous mode, and some kind of an antenna which can be mounted

on top of or positioned inside the car. Because a WLAN may have a range

that extends beyond an office building, an outside user may be able to

intrude into the network, obtain a free Internet connection, and possibly

gain access to company records and other resources.

ad-hoc network A LAN or other small network, especially one with wireless or temporary

plug-in connections, in which some of the network devices are part of the

network only for the duration of a communications session or, in the case

of mobile or portable devices, while in some close proximity to the rest of

the network.

band A specified range of frequencies of electromagnetic radiation.

DHCP The Dynamic Host Configuration Protocol (DHCP) is an auto-configuration

protocol used on IP networks. Computers or any network peripherals that

are connected to IP networks must be configured, before they can

communicate with other computers on the network. DHCP allows a

computer to be configured automatically, eliminating the need for a

network administrator. DHCP also provides a central database to

keep track of computers connected to the network. This database helps in

preventing any two computers from being configured with the same IP

address.

DNS Server A Domain Name System (DNS) server functions as a phonebook for the

Internet and Internet users. It converts human readable computer

hostnames into IP addresses and vice-versa.

A DNS server stores several records for a domain name such as an

address 'A' record, name server (NS), and mail exchanger (MX) records.

The Address 'A' record is the most important record that is stored in a DNS

server, because it provides the required IP address for a network

peripheral or element.

DST Daylight saving time (DST), also known as summer time, is the practice of

advancing clocks, so that evenings have more daylight and mornings

have less. Typically clocks are adjusted forward one hour near the start of

spring and are adjusted backward in autumn.

EAP Extensible authentication protocol (EAP) refers to the authentication

protocol in wireless networks that expands on methods used by the point-

to-point protocol (PPP), a protocol often used when connecting a

computer to the Internet. EAP can support multiple authentication

mechanisms, such as token cards, smart cards, certificates, one-time

passwords, and public key encryption authentication.

Table 12:

List of Terms

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