Jose, lighten up, I was joking... -gil
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Medeiros, Jose Sent: Thursday, May 05, 2005 4:53 PM To: [email protected] Subject: RE: [ActiveDir] DNS vs. Hosts File Hi Gill, I stand corrected on both counts. I guess I should know that it is University of California Berkeley since I have taken course's at their extension program. I some times fail to proof read my emails before sending them if I am in the middle of working on other things and lack the time. Hope I didn't sound to foolish, Regards, Jose Medeiros ----------------------------------------------------- -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Gil Kirkpatrick Sent: Thursday, May 05, 2005 3:23 PM To: [email protected] Subject: RE: [ActiveDir] DNS vs. Hosts File Jose, Jose, Jose.... 1) It's the University of California, not University of Berkely. Yes, Cal is located in Berkeley, CA and we do have several small extension campuses in Los Angeles (UCLA), Santa Barabara (UCSB), San Diego (UCSD), etc. However, there is only one University of California. 2) Paul Mockapetris invented DNS in 1983-4 to address the utter lack of scalability and reliability of host files. Host files are still utterly unreliable and unscalable. DNS on the other hand is utterly reliable and astoundingly scalable. See, for instance, the Internet. Paul was working at USC (the University for Spoiled Children) at the time. I think he now has a real job. 3) The Berkeley distribution of Unix (BSD), was in fact developed at the University of California, and it includes an implementation of DNS called BIND for Berkeley Internet Name Daemon (or Domain, depending on who you talk to). It is easily the most popular implementation of DNS, written as it was at a superior computer science institution. Just so we're all clear on the facts... :) -gil -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Medeiros, Jose Sent: Thursday, May 05, 2005 2:54 PM To: [email protected] Subject: RE: [ActiveDir] DNS vs. Hosts File Hi Dan, Yes your boss is indeed wrong. Hosts files existed prior to the invention of DNS by the University of Berkely. DNS is very reliable if it is configured correctly and placed on servers that are not overburdened with other process's. I would point your boss to several books: http://www.amazon.com/exec/obidos/tg/detail/-/1562059432/qid=1115329652/ sr=1-11/ref=sr_1_11/104-9533871-4784765?v=glance&s=books http://www.oreilly.com/catalog/dnsbindckbk/ http://www.rallenhome.com/books.html Keep in mind that the entire internet runs off root DNS servers, how often has that gone down? Sincerely, Jose Medeiros MCP+I, MCSE, NT4 MCT www.ntea.net www.tvnug.org www.sfntug.org ------------------------------------------------------------------------ - -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dan DeStefano Sent: Thursday, May 05, 2005 1:24 PM To: [email protected] Subject: [ActiveDir] DNS vs. Hosts File Recently, one of my colleagues and I got into a discussion about DNS vs. hosts files in AD. He has configured the hosts file on all of our domain controllers (Windows 2000 AD in native mode) to point to other DCs. One of our DCs was moved to another site and the hosts file on a DC was not changed to point to the moved DC on its new subnet - this obviously resulted in NTFRS errors. Anyway, after this I got into a discussion with my boss about the need of the hosts file in AD. It is my position that the hosts file is no longer necessary and should not really be used in AD and is only included for backward-compatibility, testing and for certain special instances. It is his position that DNS is untrustworthy and that the hosts file should be configured as a backup in case DNS goes down. My response to this was twofold - 1. the hosts file is queried before DNS so it is not really a backup, it is a primary method of name-resolution, plus, it does not support SRV records; 2. DNS is the foundation of AD and if it goes down, AD will not work correctly anyway. Plus, that is the reason for secondary DNS servers, of which we have several. Could anyone point to any documentation that discusses the role of the hosts file in AD and also include your own opinions and comments. _________________________ Daniel DeStefano PC Support Specialist IAG Research 345 Park Avenue South, 12th Floor New York, NY 10010 T. 212.871.5262 F. 212.871.5300 www.iagr.net Measuring Ad Effectiveness on Television The information contained in this communication is confidential, may be privileged and is intended for the exclusive use of the above named addressee(s). If you are not the intended recipient(s), you are expressly prohibited from copying, distributing, disseminating, or in any other way using any of the information contained within this communication. If you have received this communication in error, please contact the sender by telephone 212.871.5262 or by response via e-mail. 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