Security News > 2021 > February > Friday Squid Blogging: Far Side Cartoon

What many incorrectly call RS232 is supposed to be seven bits of data a parity bit and a start bit and one or one and a half stop bits That means much of the time you have ten bits on the line for every seven data bits sent thus 70% -or worse- bandwidth utilization.

There are two basic solutions use a lower level physical "Manchester Encoding" or split the data into 8bit bytes and send them asynchronously as is seen in early protocols prior to and including PPP still used for dialup data connections to the Internet.

So you want to define a linked list where a first data type implicitly contains a link to a second data type to do this you need to know the size of the second data type.

On declaring the first data type the second data type is unknown so it can not be done.

Unless you declare the second data type first, but you can not because it links to the first data type.

You send a large data packet an one bit gets flipped then you have to repeatedly send the large data packet over and over till you get lucky.

News URL

https://www.schneier.com/blog/archives/2021/02/friday-squid-blogging-far-side-cartoon.html