Spread spectrum signal processing technology like magic, so each system can co-exist. Spread spectrum system is stable, but it is worth noting that: the design of enterprise multi-unit spread-spectrum system, the coherent interference problem is inevitable. That we must be clear, because it will help to design and support of wireless local area network. Each Wi-Fi equipment, is a send and receive wireless signal transceiver, whether it is a PC card, NIC or AP. Because all of the Wi-Fi systems use high frequency microwave signals, so the signal attenuation quickly. Such as the higher frequency of 5-GHz 802.11a signal attenuation suffered than the 2.4-GHz high, especially when within the coverage of the ground, walls and other solid targets.
There are many reasons to upgrade to IPv6. Upgrade to IPv6 will not only strengthen the security of IP performance, it also allows the system to get rid of NAT, so that applications can be more easily integrated audio and video content. Users may not want or need one to be all business all the desktop systems to upgrade to Vista. In fact, large companies have taken the time to upgrade the operating system has to go step by step strategy. Upgrade can not be arbitrary. Upgrade part of the plan should include an assessment of the work, such as assessment of what users are most able to benefit from new features in Vista, who is most in need of Vistas security features. For most of the time used for word processing, spreadsheet and other office staff, the existing operating system has been able to satisfy them, they can use for a long time, the existing operating system.