DOS (Disk Operating System). The predecessor to Windows used as an operating system on PCs (Personal Computers). It could run in as little as 64K. It could address a maximum of 640K. It had no GUI (Graphic User Interface). Usually it worked with a 25 × 80 character screen, monochrome or colour. It could fit on a floppy with plenty of room for programs and data. DOS used the FAT-16 file format. With version 2.0 it supported hard disks and directories.
The term also refers to a DOS (Denial Of Service attack), when an enemy bombards your website with so many requests there is no bandwidth or computer power left over to handle legitimate traffic. This primitive sort of attack is difficult to defend against other that by having massive reserve in a server farm or cloud. The attacker often uses viruses or Trojans to commandeer PCs all over the globe for the attack, so it difficult to tell attackers from legitimate users. CloudFlare handles DOS attacks by intercepting traffic to your site and passing through only traffic it believes to be legit. This adds 5 seconds or so to the response time. The government of the Philippines uses the service.
available on the web at:
optional Replicator mirror
Please email your feedback for publication, letters to the editor, errors, omissions, typos, formatting errors, ambiguities, unclear wording, broken/redirected link reports, suggestions to improve this page or comments to Roedy Green : . If you want your message, your name or email kept confidential, not considered for public posting, please explicitly specify that. Unless you state otherwise, I will treat your message as a letter to the editor that I may or may not publish in the feedback section. After that, it will be too late to retract it. If you disagree with something I said, especially when sending an ad-hominem attack, a rant composed mainly of obscenities or a death threat, please quote the offending passage and cite the web page where you found it, tell me why you think it is wrong, and, if possible, provide some supporting evidence. I can’t very well fix erroneous or ambiguous text if I can’t find it.
Your face IP:[220.127.116.11]
|Feedback||You are visitor number 11.|