Personal computing discussed
Moderators: renee, Steel, notfred
Sikthskies wrote:Am I right in thinking that the switch will allocate internet traffic to where it is wanted and the hub just duplicates the incoming information both sides?
just brew it! wrote:Stone age to me is defined as no nub/switches and we go coax, T-connectors, and terminators. (still have like 4 cards plus cabling+connectors to build one)In other words... you're getting a switch. Unless you want to go back to the stone age (10 mbit).
Sikthskies wrote:I want to split my ethernet signal so it can run to two routers. One wireless and one wired.
What is the best option? Switch or hub? Am I right in thinking that the switch will allocate internet traffic to where it is wanted and the hub just duplicates the incoming information both sides?
just brew it! wrote:AFAIK you can't even get a gigabit hub (as in, they don't exist). And 100 mbit hubs are pretty rare these days as well (they were more common back when 100 mbit Ethernet was first introduced).
In other words... you're getting a switch. Unless you want to go back to the stone age (10 mbit).
Shining Arcanine wrote:As far as I know, the electrical connections are the same.
Flying Fox wrote:Bah, 10Base2 is modern stuff, Stone age is 10Base5 with vampire taps - now get off my lawn!just brew it! wrote:Stone age to me is defined as no nub/switches and we go coax, T-connectors, and terminators. (still have like 4 cards plus cabling+connectors to build one)Unless you want to go back to the stone age (10 mbit).
Shining Arcanine wrote:As far as I know, you cannot buy hubs anymore. If you want to use a hub, you would probably be best off physically splicing the cables so that the same cable serves 3 different points. That is basically what a hub does, except it puts that functionality into a nice neat package.
Shining Arcanine wrote:I think you can use an old 10Mb hub as a 1Gb hub. As far as I know, the electrical connections are the same.
Flying Fox wrote:Nah, stone age is carrying around floppies. 5.25" floppies.Stone age to me is defined as no nub/switches and we go coax, T-connectors, and terminators. (still have like 4 cards plus cabling+connectors to build one)
UberGerbil wrote:Shining Arcane, man, I want some of what you're smoking.Flying Fox wrote:Nah, stone age is carrying around floppies. 5.25" floppies.Stone age to me is defined as no nub/switches and we go coax, T-connectors, and terminators. (still have like 4 cards plus cabling+connectors to build one)
No wait, 8" floppies.
No wait, tape.
No, punch cards. Now that is a sneaker-net.
UberGerbil wrote:...
No, punch cards. Now that is a sneaker-net.
cheesyking wrote:But then you need fans and heatsinks to keep them cool, because they lose their data integrity at just above room temp. Installing your wax tablets in a hot case is not advised. Though at least it makes rewrite easy. I prefer my tablets be clay for data integrity reasons, but they're WORM storage. And they're not especially suited for mobile applications (they're heavy, and can't tolerate sudden G loads). Talk about needing forklifts for significant data storage...personally I use wax tablets.
UberGerbil wrote:On the other hand, considering we're still able to retrieve accounting data from 4000+ year old clay tablets, data retention issues are clearly solved for this technology -- something that is still somewhat unresolved for most of the techs we're using today.
Contingency wrote:This is selection bias at its finest--the tablets that failed are dust by now. I'm convinced that in a thousand years, monks will be able to recover data from the half-dozen or so surviving hard drives. Perhaps they will be enlightened enough to recognize lolcats for what it is: a display of collective madness which ultimately led to the downfall of civilization.
just brew it! wrote:Shining Arcanine wrote:As far as I know, you cannot buy hubs anymore. If you want to use a hub, you would probably be best off physically splicing the cables so that the same cable serves 3 different points. That is basically what a hub does, except it puts that functionality into a nice neat package.
While hubs do in fact retransmit the signal on all ports, it is not at all like just wiring the ports together physically. All twisted pair based Ethernet (10, 100, and 1000 mbit) are fundamentally point-to-point links -- for 10/100 mbit, one pair is transmit, and one is receive; for 1000 mbit there are two transmit pairs and two receive pairs. How exactly do you propose to wire 3 NICs together such that they're all transmitting and receiving on the proper pairs?
A hub also provides impedance matching, and detects collisions (transmitting a "jam" signal on all ports to ensure that all NICs detect the collision properly).
In short, splicing the cables together as you suggest will not work for a number of reasons, both physical and logical.Shining Arcanine wrote:I think you can use an old 10Mb hub as a 1Gb hub. As far as I know, the electrical connections are the same.
No, not even close. A hub doesn't just bridge the wires together physically, it receives signals on the receive pair(s) of each port, and retransmits those signals on the transmit pair(s) of all other ports. There's active circuitry involved, and for a 10Mb hub that circuitry won't even work at 100 mbit speeds (let alone 1000 mbit).
The electrical connections are different too -- 1000 mbit uses all 4 pairs of wires in the cable, whereas 10/100 uses just 2 of the pairs.
At best, you are confusing modern twisted pair Ethernet with "old school" 10Base2 Ethernet, which used a single coaxial cable in a shared bus arrangement.
just brew it! wrote:Contingency wrote:This is selection bias at its finest--the tablets that failed are dust by now. I'm convinced that in a thousand years, monks will be able to recover data from the half-dozen or so surviving hard drives. Perhaps they will be enlightened enough to recognize lolcats for what it is: a display of collective madness which ultimately led to the downfall of civilization.
While the magnetic patterns on the platters might survive that long, the mechanical components and lubricants used thereon will have long since degraded into uselessness. They would need to build a new drive around the existing platters; if civilization has fallen, I highly doubt they'd be able to do this.
Stone tablets have the advantage of not requiring any special equipment to read the patterns on their surface.
(Jeez, we got pretty far off-topic here, didn't we? Maybe it is time for a thread split...)
Shining Arcanine wrote:My networking class last semester said that all of the computers in universities used to all run off of the same cable. I do not believe think the specification changed in a way that disallows that since then.
Shining Arcanine wrote:My networking class last semester said that all of the computers in universities used to all run off of the same cable. I do not believe think the specification changed in a way that disallows that since then.
Shining Arcanine wrote:My networking class last semester said that all of the computers in universities used to all run off of the same cable. I do not believe think the specification changed in a way that disallows that since then.
UberGerbil wrote:It's possible the instructor was talking about a common backbone in a logical sense, but not a single cable in the physical sense.
Contingency wrote:Shining Arcanine wrote:My networking class last semester said that all of the computers in universities used to all run off of the same cable. I do not believe think the specification changed in a way that disallows that since then.
Maybe they did: http://en.wikipedia.org/wiki/Thinnet
And maybe you should have paid more attention when physical topologies were being discussed.
Shining Arcanine wrote:I am glad someone here caught this for me because I was thinking of actually trying this.
Shining Arcanine wrote:The specification is IEEE 802.3 and then a set of suffix letters that specify the revision e.g. first version of 10GigE came in 802.3ae, 100GigE is coming in 802.3ba. Each version incorporates the earlier standards but over their own media type i.e. just because 100GigE incorporates the 10GigE standard, it doesn't mean that the physical layer will look anything like the same (it doesn't). In short, although it is the same standard, the technologies keep getting updated and are not backwards compatible apart from at a very high level in terms of the layout of the frame.I do not believe think the specification changed in a way that disallows that since then.