Drew Wutka
DWUTKA at marlow.com
Mon Nov 3 13:19:25 CST 2003
Ack, need sleep....you're right. Too many TLA's at the moment. Drew -----Original Message----- From: Jim Dettman [mailto:jimdettman at earthlink.net] Sent: Monday, November 03, 2003 12:41 PM To: Access Developers discussion and problem solving Subject: RE: [AccessD] OT: Wireless network (sort of) Drew/Erwin, One minor correction. Switches don't use NAT tables. They use MAC Address lists and ARP tables. NAT is something done only in a router. Jim Dettman President, Online Computer Services of WNY, Inc. (315) 699-3443 jimdettman at earthlink.net -----Original Message----- From: accessd-bounces at databaseadvisors.com [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Drew Wutka Sent: Monday, November 03, 2003 11:59 AM To: 'Access Developers discussion and problem solving' Subject: RE: [AccessD] OT: Wireless network (sort of) Read Erwins post a little while ago, was waiting for your's before I replied! <grin> Erwin, switches also use NAT tables. Because of this, they don't have to broadcast everything in all directions. They're 'smart', when a packet comes in, they can properly direct it. The downside to the NAT tables is that if you blow the NAT table away, it has to be rebuilt, so sometimes on an initial powerup, a switch may seem slower, which is simply the time it is using to build the NAT tables. Drew -----Original Message----- From: Frank Tanner III [mailto:pctech at mybellybutton.com] Sent: Sunday, November 02, 2003 8:35 AM To: Access Developers discussion and problem solving Subject: RE: [AccessD] OT: Wireless network (sort of) And they improve speed. Because they do not SHARE the bandwidth amongst the ports. A 10-BaseT hub SHARES that speed amongst the available ports. This dividing the individual bandwidth per port. A switch allocates all available bandwidth on a PER PORT basis. Maybe you need to learn what you are talking about before you give out false information. --- Erwin Craps <Erwin.Craps at ithelps.be> wrote: > And to be correct, switches don't improve speed > (compared to hub's) they > improve bandwith and reduce collisions!!! > Switches create virtual point to point connections. > > Switches do improve speed compared to routers. > > Erwin > > -----Oorspronkelijk bericht----- > Van: accessd-bounces at databaseadvisors.com > [mailto:accessd-bounces at databaseadvisors.com] Namens > Frank Tanner III > Verzonden: zaterdag 1 november 2003 16:23 > Aan: Access Developers discussion and problem > solving > Onderwerp: RE: [AccessD] OT: Wireless network (sort > of) > > > Switches will ALWAYS improve your speed over hubs. > Period. > > Hubs SHARE the same bandwidth on all ports. > Switches > allocate the max bandwidth per port. > > You are incorrect. > > --- Erwin Craps <Erwin.Craps at ithelps.be> wrote: > > But switches have no sense in a 1 server > environment > > because all of the > > trafic goes and comes from one point. > > Unless your clients are 100Mb and the uplink to > the > > server is 1Gb. > > > > People often believe switches will improve their > > network speed, but that > > is not always the case. > > But indeed the prices of the switches have dropped > > that you buy a switch > > at the price of a good hub these days. > > > > Erwin > > > > -----Original Message----- > > From: accessd-bounces at databaseadvisors.com > > [mailto:accessd-bounces at databaseadvisors.com] On > > Behalf Of Rocky Smolin > > - Beach Access Software > > Sent: Saturday, November 01, 2003 1:55 AM > > To: Access Developers discussion and problem > solving > > Subject: Re: [AccessD] OT: Wireless network (sort > > of) > > > > > > Got it. I think. Switch can route packet based on > > IP address but can't > > generate an IP address. Yes? > > > > Rocky > > > > > > Rocky > > > > ----- Original Message ----- > > From: "Frank Tanner III" > <pctech at mybellybutton.com> > > To: "Access Developers discussion and problem > > solving" > > <accessd at databaseadvisors.com> > > Sent: Friday, October 31, 2003 10:29 AM > > Subject: Re: [AccessD] OT: Wireless network (sort > > of) > > > > > > > It is sort of half-way, but not really. > > > > > > Switches are a "generation" better. Hubs and > > > switches, on their most basic level perform the > > same function. They > > > distribute network traffic. But HOW they > > distribute that traffic is > > > fundimentally different. > > > > > > Unless they're one of the newer layer 3 or layer > 4 switches, they > > > cannot perform routing functions. > > They > > > just hand packets off from point A to point B. > > Think > > > of them as sort of a postman. They have an > > address > > > for each device on the network and they hand off > > each > > > piece of mail to the appropriate address. A > hub, > > > using this sama analagy would deliver the same > > piece > > > of mail to every house and the one that it > > belonged to > > > would be the one that actually reads it. > > > > > > --- Rocky Smolin - Beach Access Software > <bchacc at san.rr.com> wrote: > > > > "but it's as close as I could think of without > > > > getting too technical." > > > > > > > > Thank you. Much appreciated. So a switch is > > like > > > > halfway between a hub and > > > > a router? > > > > > > > > Rocky > > > > > > > > ----- Original Message ----- > > > > From: "Frank Tanner III" > > <pctech at mybellybutton.com> > > > > To: "Access Developers discussion and problem > > > > solving" > > > > <accessd at databaseadvisors.com> > > > > Sent: Friday, October 31, 2003 7:36 AM > > > > Subject: Re: [AccessD] OT: Wireless network > > (sort > > > > of) > > > > > > > > > > > > > A router and a switch are fundimentall > > different > > > > > things. > > > > > > > > > > A router does just that. It routes network > > > > traffic. > > > > > > > > > > A switch plays "traffic cop" for a network. > > > > > > > > > > Newer switches, especially the layer 3 and > > layer 4 > > > > > ones can perform both functions.This isn't > an > > > > exact > > > > > definition, but it's as close as I could > think > > of > > > > > without getting too technical. > > > > > > > > > > --- Rocky Smolin - Beach Access Software > > <bchacc at san.rr.com> > > > > > wrote: > > > > > > Is there a difference between a switch and > a > > > > router? > > > > > > > > > > > > Rocky > > > > > > > > > > > > ----- Original Message ----- > > > > > > From: "Frank Tanner III" > > > > <pctech at mybellybutton.com> > > > > > > To: "Access Developers discussion and > > problem > > > > > > solving" > > > > > > <accessd at databaseadvisors.com> > > > > > > Sent: Friday, October 31, 2003 6:54 AM > > > > > > Subject: RE: [AccessD] OT: Wireless > network > > > > (sort > > > > > > of) > > > > > > > > > > > > > > > > > > > I recommend "hardwiring" the IP address > of > > any > > > > > > device > > > > > > > or server connected to your LAN that's > not > > a workstation and > > > > > > > is virtually always on. > > > > > > > > > > > > > > For the price, I would also highly > > recommend > > > > > > removing > > > > > > > all hubs from your network and using > them > > as doorstops. > > > > > > > Switches have come way down in > > > > price > > > > > > and > > > > > > > have many benifits over hubs. > > > > > > > > > > > > > > Hubs divide the bandwidth across all > > ports. > > > > Thus > > > > > > if > > > > > > > you have an 8-port 10-BaseT hub, all > ports > > > > that > > > > > > are > > > > > > > processing data split that 10Mbit. 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