Linksys BEFW11S4 manual Instant Wireless Series

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Instant Wireless® Series

cabling systems (wires, junctions, and connectors) in terms of the data rates that they can sustain. CAT 5 cable has a maximum throughput of 100 Mbps and is usually utilized for 100BaseTX networks.

CAT 5e - The additional cabling performance parameters of return loss and far- end crosstalk (FEXT) specified for 1000BASE-T and not specified for 10BASE-T and 100BASE-TX are related to differences in the signaling imple- mentation. 10BASE-T and 100BASE-TX signaling is unidirectional-signals are transmitted in one direction on a single wire pair. In contrast, Gigabit Ethernet is bi-directional-signals are transmitted simultaneously in both direc- tions on the same wire pair; that is, both the transmit and receive pair occupy the same wire pair.

CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) - In local area networking, this is the CSMA technique that combines slotted time-divi- sion multiplexing with carrier sense multiple access/collision detection (CSMA/CD) to avoid having collisions occur a second time. This works best if the time allocated is short compared to packet length and if the number of sit- uations is small.

Data Packet - One frame in a packet-switched message. Most data communi- cations is based on dividing the transmitted message into packets. For example, an Ethernet packet can be from 64 to 1518 bytes in length.

Default Gateway - The routing device used to forward all traffic that is not addressed to a station within the local subnet.

DHCP (Dynamic Host Configuration Protocol) - A protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network. Using the Internet's set of protocol (TCP/IP), each machine that can connect to the Internet needs a unique IP address. When an organization sets up its computer users with a con- nection to the Internet, an IP address must be assigned to each machine. Without DHCP, the IP address must be entered manually at each computer and, if computers move to another location in another part of the network, a new IP address must be entered. DHCP lets a network administrator supervise and dis- tribute IP addresses from a central point and automatically sends a new IP address when a computer is plugged into a different place in the network.

DHCP uses the concept of a "lease" or amount of time that a given IP address will be valid for a computer. The lease time can vary depending on how long a user is likely to require the Internet connection at a particular location. It's espe-

Wireless Access Point Router with 4-Port Switch

cially useful in education and other environments where users change fre- quently. Using very short leases, DHCP can dynamically reconfigure networks in which there are more computers than there are available IP addresses.

DHCP supports static addresses for computers containing Web servers that need a permanent IP address.

DMZ (Demilitarized Zone) - Allows one IP address (or computer) to be exposed to the Internet. Some applications require multiple TCP/IP ports to be open. It is recommended that you set your computer with a static IP address if you want to use DMZ Hosting.

DNS - The domain name system (DNS) is the way that Internet domain name are located and translated into Internet Protocol (IP) addresses. A domain name is a meaningful and easy-to-remember "handle" for an Internet address.

Domain - A subnetwork comprised of a group of clients and servers under the control of one security database. Dividing LANs into domains improves per- formance and security.

Download - To receive a file transmitted over a network. In a communications session, download means receive, upload means transmit.

DSL (Digital Subscriber Line) - A technology that dramatically increases the digital capacity of ordinary telephone lines into the home or office and, by employing unused bandwidth, still allows for normal phone usage. DSL pro- vides "always-on" operation, eliminating the need to dial in to the service.

DSSS (Direct-Sequence Spread Spectrum) - DSSS generates a redundant bit pattern for all data transmitted. This bit pattern is called a chip (or chipping code). Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the receiver can recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers. However, to an intended receiver (i.e. another wireless LAN end- point), the DSSS signal is recognized as the only valid signal, and interference is inherently rejected (ignored).

DTIM (Delivery Traffic Indication Message) - A DTIM field is a countdown field informing clients of the next window for listening to broadcast and mul- ticast messages. When the AP has buffered broadcast or multicast messages for

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Contents Wireless Access Point Router With 4-Port Switch Copyright & Trademarks Industry Canada Canada Table of Contents Minimum Requirements Linksys Wireless Access Point Router with 4-Port SwitchFeatures IntroductionStatic IP Addresses Dhcp Dynamic Host Configuration Protocol ServersIP Addresses What’s an IP Address?Ports Wireless Access Point Router’s PortsPower Wireless Access Point Router’s LEDsBefore You Start Connecting the RouterWAN Indicators Connecting Your Hardware Together and Booting UpInstant Wireless Series Configuring the PCs Configuring Windows 95, 98, and Millennium PCsOverview Configuring Windows 2000 PCs Configuring Windows XP PCs A b l e / D i s a b l e Configuring the RouterPPPoE Obtain an IP AutomaticallyStatic IP AddressPptp Using the Router’s Web- Based UtilitySetup Static IP Status PasswordDhcp Log AOL Parental Controls SecurityFilters HelpAdvanced Tab Filters Setting Up FiltersEditing MAC Filter Setting Using Multicast Pass ThroughUsing Remote Upgrade Using IPSec Pass ThroughUsing Pptp Pass Through Using Remote ManagementAdvanced Tab Port Range Forwarding UPnP ForwardingInstant Wireless Series Advanced Tab Dynamic Routing Port TriggeringAdvanced Tab Static Routing Advanced Tab MAC Address Cloning Advanced Tab DMZ HostAdvanced Tab Wireless Appendix a Troubleshooting Common Problems and SolutionsNeed to set a static IP address on a PC For Windows 95, 98, and Me For Windows NTFor Windows XP Want to test my Internet connectionFor Windows XP Need to set up a server behind my Router Am not able to access the Router’s web interface SetupCan’t get the Internet game, server, or application to work My DSL service’s PPPoE is always disconnecting To start over, I need to set the Router to factory defaultNeed to upgrade the firmware Firmware upgrade failed, and/or the Diag LED is flashingFull/Col LED keeps flickering continuously Click the Advanced = Filter tabNeed to use port triggering Diag LED stays lit continuouslyFrequently Asked Questions Allows Pptp packets to pass through Instant Wireless Series Appendix B How to Ping Your ISP’s E-mail and Web Addresses Step One Pinging an IP AddressStep Two Pinging for a Web Address Appendix C Configuring Wireless Security Figure C-2 Figure C-3 Configuring Wireless Security in Windows XPFigure C-6 Figure C-10 For Windows NT, 2000, and XP Figure D-3Http//192.168.1.1 in the web Figure D-6AOL Broadband via DSL Figure E-3Appendix F Glossary Instant Wireless Series Instant Wireless Series Instant Wireless Series 100 102 104 Environmental Appendix G SpecificationsAppendix H Warranty Information Appendix I Contact InformationWeb site FTP site Copyright 2003 Linksys, All Rights Reserved
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