ZyXEL G-162/G-360 User’s Guide

2.3Fragmentation Threshold

The Fragmentation Threshold is the maximum data fragment size (between 256 and 2432 bytes) that can be sent in the wireless network before the ZyXEL G-162/G-360 will fragment the packet into smaller data frames.

A large Fragmentation Threshold is recommended for networks not prone to interference while you should set a smaller threshold for busy networks or networks that are prone to interference.

If the Fragmentation Threshold value is smaller than the RTS/CTS Threshold value (see previously) you set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames will be fragmented before they reach RTS/CTS Threshold size.

2.4RTS/CTS Threshold

A hidden node occurs when two stations are within range of the same access point, but are not within range of each other. The following figure illustrates a hidden node. Both stations are within range of the access point (AP) or wireless gateway, but out-of-range of each other, so they cannot “hear” each other, that is they do not know if the channel is currently being used. Therefore, they are considered hidden from each other.

Figure 2-8 RTS Threshold

When station A sends data to the AP, it might not know that the station B is already using the channel. If these two stations send data at the same time, collisions may occur when both sets of data arrive at the AP at the same time, resulting in a loss of messages for both stations.

RTS/CTS Threshold is designed to prevent collisions due to hidden nodes. An RTS/CTS Threshold defines the biggest size data frame you can send before an RTS (Request To Send)/CTS (Clear to Send) handshake is invoked.

When a data frame exceeds the RTS/CTS Threshold value you set (between 0 to 2432 bytes), the station that wants to transmit this frame must first send an RTS (Request To Send) message to the AP for permission to send it. The AP then responds with a CTS (Clear to Send) message to all other stations within its range to notify them to defer their transmission. It also reserves and confirms with the requesting station the time frame for the requested transmission.

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WLAN Networking

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ZyXEL Communications G-360, G-162 manual Fragmentation Threshold, RTS/CTS Threshold
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G-162, G-360 specifications

ZyXEL Communications is recognized for its innovative networking solutions, and among its notable products are the G-162 and G-360 wireless USB adapters. These devices empower users to connect to wireless networks while delivering robust performance and reliability.

The ZyXEL G-162 is a compact USB adapter designed to provide wireless connectivity to laptops or desktop computers. It supports the IEEE 802.11b/g standards, which ensures compatibility with a wide range of wireless networks. Featuring a sleek design, the G-162 is easy to install, with a plug-and-play capability that enables users to quickly connect to their networks without complex setup procedures. This device operates in the 2.4 GHz frequency band, delivering a maximum wireless speed of up to 54 Mbps, making it suitable for tasks such as web browsing, email, and streaming audio and video.

On the other hand, the ZyXEL G-360 takes connectivity a step further by integrating both wireless and Ethernet connectivity options. Similar to the G-162, it also adheres to the 802.11b/g standards. However, the G-360 provides an additional Ethernet port, which allows users to connect devices that require a wired connection, ensuring flexible networking setups. The G-360 is equipped with advanced security features, including WPA/WPA2 encryption, ensuring that data is transmitted securely across the network.

Both the G-162 and G-360 are designed with user convenience in mind. They come with drive support for various operating systems, including Windows and Mac, making them versatile for different user environments. The compact form factor of these USB adapters means they can be easily transported, allowing users to maintain internet connectivity while on the move.

The build quality of ZyXEL devices is commendable, as they are engineered for durability and long-term use. Moreover, their performance in terms of range and signal stability is enhanced by intelligent antenna placement and power management features, ensuring a reliable connection in various settings.

In conclusion, the ZyXEL G-162 and G-360 are excellent choices for users seeking efficient wireless connectivity solutions. With their extensive features, security protocols, and user-friendly design, these devices highlight ZyXEL’s commitment to improving connectivity and enhancing the user experience in the ever-evolving digital landscape. Whether for home or office use, these wireless USB adapters stand as a testament to ZyXEL's innovation in communication technology.
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