Dell W-Series 228 Instant 6.4.3.1-4.2 User Guide - Page 401
Table 80
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Table 80: List of Terms Term DNS Server DST EAP fixed wireless frequency allocation frequency spectrum hotspot IEEE 802.11 standards POE Definition 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. 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. 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. Wireless devices or systems in fixed locations such as homes and offices. Fixed wireless devices usually derive their electrical power from the utility mains, unlike mobile wireless or portable wireless which tend to be battery-powered. Although mobile and portable systems can be used in fixed locations, efficiency and bandwidth are compromised compared with fixed systems. Use of radio frequency spectrum regulated by governments. Part of the electromagnetic spectrum. A WLAN node that provides Internet connection and virtual private network (VPN) access from a given location. A business traveler, for example, with a laptop equipped for Wi-Fi can look up a local hot spot, contact it, and get connected through its network to reach the Internet and their own company remotely with a secure connection. Increasingly, public places, such as airports, hotels, and coffee shops are providing free wireless access for customers. The IEEE 802.11 is a set of standards that are categorized based on the radio wave frequency and the data transfer rate. Power over Ethernet (PoE) is a method of delivering power on the same physical Ethernet wire used for data communication. Power for devices is provided in one of the following two ways: l Endspan- The switch that an AP is connected for power supply. l Midspan- A device can sit between the switch and APs 401 | Terminology Dell Networking W-Series Instant 6.4.3.1-4.2.0.0 | User Guide