From: Hyper Newsgroups: comp.os.msdos.djgpp Subject: Re: I am absolutely new to programming Date: Wed, 04 Aug 1999 06:54:56 -0400 Organization: None, very disorganized Lines: 34 Message-ID: <37A81C00.DB3D9C7@snip.net> References: <7o5pin$t74 AT dfw-ixnews10 DOT ix DOT netcom DOT com> <37A691B3 DOT EC8F8936 AT snip DOT net> <37A7EBF3 DOT 91958FF2 AT megsinet DOT net> NNTP-Posting-Host: harc2a64.snip.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.61 [en] (Win98; I) X-Accept-Language: en To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com David Oppenheimer wrote: > > Please note that hyperlinks are governed by a host to host protocol called UDP > or User Datagram Protocol which is very unreliable and has zero error checking > (kinda like sending off a postcard onto the WWW with the message "I am looking > for remote server 217.64.76.93". There is no two way communication, no virtual > circuit, no sequencing, no reliability). It is quite quick and requires much > less CPU overhead, but lacks some of the advantages of TCP or Transmission > Control Protocol - a host to host protocol used for downloading files. (TCP > has error checking, sequencing, acknowledgments, and is very reliable. It is > comparable to a phone call where you might say "Are you there?" "Yes I'm > here." " I am ready to send you some information" "I am ready to receive it" > "Did you get the information I just sent?" etc. etc. etc.) > > Before jumping to the conclusion that a hyperlink is bad, or that a server on > the WWW is down, you need to try a hyperlink at least several times due to the > inherent unreliability of the UDP protocol. > ok then, let me rephrase my opinion. I clicked the link, "Netscape is unable to find the server www.swcp.com" So i typed the address "http://www.swcp.com" and hit enter, same message. I pinged "www.swcp.com" with ping.exe, couldn't find host www.swcp.com. Perhaps my ISP's DNS server for some odd reason didn't have it listed, maybe there was a problem causing the DNS server to go down, i don't know. What i do know is that after trying for about 15 minutes, checking stuff like scwp.com, swpc.com, wspc.com, and wscp.com and not finding the site that was refered, i posted a message stating that the link was bad. As for your little explanation of the difference between UDP and TCP, thanks, but i knew all that already. None of that would explain how 30+ tries to find a server come back bad though -- My heart goes out to the families of Gene Hart and Dimitri Tertyshny Who both died tragically during the month of July, in two seperate instances May both of your souls rest in peace Personal page -- http://members.xoom.com/Hyper_Hands/