Wireless-G Travel Router with SpeedBooster

selects the right access point and registers its address. Communications between end node and host computer can then be transmitted up and down the backbone.

As the user moves on, the end node’s RF transmitter regularly checks the system to determine whether it is in touch with the original access point or whether it should seek a new one. When a node no longer receives acknowledgment from its original access point, it undertakes a new search. Upon finding a new access point, it then re-registers, and the communication process continues.

What is ISM band?

The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM (Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in the hands of users around the globe.

What is Spread Spectrum?

Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in reliable, secure, mission-critical communications systems. It is designed to trade off bandwidth efficiency for reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband transmission, but the trade-off produces a signal that is, in effect, louder and thus easier to detect, provided that the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives, Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).

What is DSSS? What is FHSS? And what are their differences?

Frequency-Hopping Spread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical channel. To an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence Spread- Spectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio 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.

What is WEP?

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as described in the IEEE 802.11 standard.

What is a MAC Address?

The Media Access Control (MAC) address is a unique number assigned by the manufacturer to any Ethernet networking device, such as a network adapter, that allows the network to identify it at the hardware level. For all

Appendix A: Troubleshooting

55

Frequently Asked Questions

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Linksys WTR54GS What is ISM band?, What is Spread Spectrum?, What is DSSS? What is FHSS? And what are their differences?
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WTR54GS specifications

The Linksys WTR54GS is a robust wireless router that combines performance and ease of use for home and small office networks. With its sleek design and advanced technology, it caters to users seeking reliable connectivity for multiple devices. One of its standout features is the Wireless-G technology, which provides a maximum data transfer rate of up to 54 Mbps. This makes it ideal for streaming videos, online gaming, and facilitating smooth internet browsing.

The WTR54GS supports 802.11g standards, ensuring compatibility with a wide range of devices, including laptops, smartphones, and tablets. It also supports backward compatibility with 802.11b devices, which is essential for users with older equipment. Enhanced by SpeedBooster technology, the WTR54GS improves performance by increasing the range and speed of the wireless connection, which is particularly beneficial in larger homes or offices where signal strength might be a concern.

Security is a top priority for the Linksys WTR54GS, offering robust features such as WEP, WPA, and WPA2 encryption protocols. This ensures that users can maintain a secure connection while protecting sensitive data from unauthorized access. Additionally, the router features a built-in firewall that helps defend against potential intrusions, providing an added layer of security for the network.

Equipped with four Ethernet ports, the WTR54GS enables users to connect wired devices for more stable and faster connections. This is particularly useful for activities that require high bandwidth, such as video conferencing or online gaming. The router also includes an intuitive web-based setup interface, allowing users to configure and manage their network settings effortlessly.

Another notable characteristic of the Linksys WTR54GS is its support for Quality of Service (QoS) features, which prioritize bandwidth for important applications, ensuring that critical tasks receive the necessary resources for optimal performance. This is particularly useful for households with multiple users and devices competing for bandwidth.

Overall, the Linksys WTR54GS is a versatile and reliable router that provides excellent performance for various networking needs. With its combination of speed, security, and user-friendly features, it remains a popular choice for those looking to enhance their wireless networking experience.
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