802.16d PHY – FDD
Fixed WiMAX (802.16d) PHY - FDD
- Uplink & Downlink Channels are on separate frequency.
- Downlink is transmitted in bursts
- Simultaneously support both Full Duplex & Half Duplex SS's.
- Downlink Carrier may be continuous
Linux File and Directory Permissions
file & directory protection is a essential of any OS and Linux OS is no exception for it! These authorizations allow you to choose exactly who can access your files & directory, providing an overall improved system security. There was one of the major flaws in the older Windows operating-system where, by standard, all users can see each other people's information (Windows 95, 98, Me). For overcoming it, editions of the Windows based computer system such as NT, 2000, XP and 2003 lot more security features added. They fully support file & directory permissions, just as Linux system has since the beginning. Together, we'll now assess a directory listing from our Lab Linux system hosting server, to help us understand the information provided. a simple 'ls' command will give you the file and directory listing within a given directory, including the option '-l' will display number of new areas that we are going to discuss here:
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