Securing Campus Wireless Networks – A RADIUS Solution
I mentioned in the “other services” lecture that one means of dealing with the problem of distribution of security information over a large wireless network, such as a campus network is to use a RADIUS server. This is the article I mentioned describing one approach to setting up a campus wireless network. The article was published in the SysAdmin Journal.
I mentioned the Windows NT startup process in today’s lecture. I also mentioned this Wikipedia article which has more details.
In last Friday’s lecture we discussed what is meant by the terms “kilobyte”, “megabyte” etc. In particular that the meaning of the term can differ depending on what we are talking about. It is customary to think of a kilobyte of memory as 1024 bytes, but most disk sizes assume that a kilobyte is 1000 bytes.
Indeed it gets slightly more complicated. Floppy disks (which are about to disappear from the shelves of PC World) are customarily referred to as 1.44MB capacity. Strangely, and for reasons that are not entirely clear, this refers to 1.4 x 1000 x 1024 bytes! In the customary parlance for disk sizes, they should in fact be 1.475MB capacity!
In an attempt to reduce the confusion over the terminology here, a new naming convention has been adopted by, among others, the IEEE. The terms “Kilo”, “Mega”, “Giga” etc., are SI symbols which represent 1000, 1000,000 and 1000,000,000 etc. The multiples of 1024 are referred to by adding “Bi” (short for “Binary”) to the first two letters of the SI symbol. Thus we have kibibytes, mebibytes, gibibytes etc.
For more details, refer to this Wikipedia article.