why is there no need for CSMA/CD on full duplex ETHERNET LAN?
142634
Full Duplex can send and receive at the same time so you dont have any collisions. CSMA/CD (Carrier Sense Media Access/ collision Detection) is used on half duplex communications.\n\nCSMA/CD works like this. \n\n1. The NIC listens to see if there´s traffic in te media (cable) \n2. if there isn´t any than it uses the media to send the info in electrical pulses\n3. if there is a collision (two computers send electric pulses at the same time) the pulses get messed up so the recipient sends an alert to all the network reportin the collision.\n4. All NICs stop sending electric pulses in the media and an aleatory algorithym applies a timer to each NIC to tell them when they can start sending pulses again. the odds of two computers getting the same time assigned is very improbable.\n5. once the timer expires the computers start the whole listening process again.\n\nhope this helps
317851
TCP/IP is more efficient and will be faster than IPX/SPX/NetBIOS, but that might not be what you should be looking at first.\n\nDo you have the dual ports configured as a team, and if so, what type of team?  Are you using a switch or a hub between the two servers and how is that configured?  What are the speeds you are getting? \n\nYou want to use link aggregation so the two ports act as one big port.  You best option is 802.3ad dynamic trunking, which your cards support.  The key is that your switch has to support this as well and it needs to be appropriately configured.
162802
hey dude, why u can't select best answer.\npngarrett is true,\nbut there is need of explaination.\nlet me explain.\n\nBoth ethernet hub and ethernet switch have allmost same function, they connects many computers but the main difference is that, switches stores ur MAC address but hubs doesn't.\nThe benefit of storing the MAC address is that, if u sends a data to a computer and there is many computers between them, but the data only goes to that computer, because the switch have a storation, that this ip address is assign on this MAC address (computer).So traffic makes faster. HUB has not amy facility of MAC address assigning. If u send a data to a particuler system, but it goes to all system and traffic becomes heavy.
741051
There is no advantage to having more than one network card in a computer unless the computer is being used as a server. Then the server software can create separate subnets to isolate two networks. For example, one side can be a network visible to the Internet while the other side is isolated and (hopefully) safe. The server can act as a gateway.\n\nI'm sure someone will come up with some obscure use for two network cards in one computer, but it's not going to do anything for you like double your speed, or anything like that.
142703
Configure the network adapters on both the PCs in Half Duplex mode and verify if this resolves the issue. This can be done as follows: -\nStep 1: Go to Start> Control Panel > and select Network connections.\n\nStep 2: Right click on your network card (for 2000 and XP only)and select Properties.\n\nStep 3: Select the Configure button.\n\nStep 4: Under the Advanced tab you will see two boxes; Property and Value. \n\nNote: Depending on the type of Ethernet card you are using the headings in the Property box will be slightly different.\n\nStep 5: Select each heading in the Properties box until the Value box displays the speed of your Ethernet card (it will look like this: Auto-Negotiation, 10Mb Full, 100 MB Half, etc..). You want to select 10mb Full Duplex.\n\nStep 6: Keep clicking OK until you get to the desktop. Your computer may ask you to reboot depending on the version of Windows you are running.
521870
This is a networking problem - look up 'Linear Bus', 'Star' or 'Hub', 'Token Ring' and 'Fully Connected Mesh'.\n\nYou need 21 for a fully connected topology, but you could do it with far less.
792438
More than you have room for PC's in your house...\n\nThis totally depends on what kind of devices you will have and what protocols are in use. For most places, you communicate via IP. Again, most places have a private class c address, meaning that you can have 254 physical devices on the subnet. Now, devide this by the number of ports per switch (less one port for daisey chaining them) and this will give you the number of switches on your LAN.\n\nSo - too many variables - theoritical limit is millions - pratical is 8 (16 ports each).\n\nIf you are talking hub, then this goes way down due to probability of collisions. Switch eliminates this problem.
972543
Today's star topologies are connected via an active switch, which eliminates collisions...thus higher throughput.\n\nIf you use a passive hub instead, yes, you will have collisions as more and more devices are added to the lan...along with exponential backoffs and slower throughput.
347002
each device pulls a seperate IP address.  Once you modem picks up one many cannot automatically switch between devices.  You can get a cheap router($40) that will split that signal so you do not have to reset.  A router works like a cable splitter for your TV.....\n\nWireless will help as long as both your PC and Mac have a wirelss card.  About $60 a piece
139999
Didn't you ask this same question yesterday?  If there were no standards, then parts wouldn't be interchangeable.  Also, for LAN standards, do a search on TCP/IP subnetting.
689043
If you want to put a T1 onto fiber, it can be done, but not with Ethernet transceivers.  T1 framing and encoding is totally different from ethernet.  The don't even use the same pin out on the jacks.  \n\nThe equipment you'd need to put it on the fiber isn't going to be cheap.  On the other hand, extending the demarc by 600' may be a problem too.  The best thing to do if you need it in a different location is to have the phone company install and extended demarc where you need it.  That's by far the most commonly used solution, and the most bulletproof way to do it.
56576
There is a solution to do this that will work without using a hub/switch. It's really kind of easy and not too hard to set up.\n\nTHE HARDWARE - \n\n3 PCI 10/100 NICs\nI reccommend Linksys cards. They tend to work the best in my experience. 3Com are nice to have, but tend to run a little spendier. \nSome computers will have the ports you need built in. Look on the back of your computer. You should see some ports that look like phone jacks. You can distinguish a phone jack from a network jack by the number of gold pins that are in the center of the jack. If there are four pins, thats a telephone line (RJ-11). Eight Pins signifies a network jack (RJ-45).\n\nYou will also need a Cat5 Crossover Cable. If you don't have one or you don't know what I'm talking about, go to your local Best Buy, Radio Shack, WalMart etc and try to find one in the computer section. Its very important that it says CROSSOVER. \n\nSOFTWARE-\n\nWindows XP. Thats it.\n\nTHE SETUP-\n\n1) Install the network cards so that one machine has two network ports in it and one machine has only one. \n\n2) Install any drivers that came with the NICs. \n\n3) Hook up the cable modem / dsl modem so that the network port on the modem connects to one of the network ports on the machine that has two network ports.\n\n4) Connect the crossover cables between the open network port on the computer with two network ports and the computer that has only one network port.\n\n5) On the computer connected to the modem, set up Internet Connection Sharing. (For tips on how to do this, visit Microsofts website <a href=http://www.microsoft.com>here</a>.\n\nThat's It! Enjoy the internet on two seperate computers.
339913
there are total 8 DMA channels(DMA0 to DMA7).\nexcept DMA4,all other channels are used for i/o devices.\nDMA2 is fixed for floppy drive.\nDMA4 is fixed for cascading from first DMA controller.\nrest are unassigned.
311250
easiest way is ethernet- one NIC card for each computer, and a hub to link 'em
107338
You can use LapLink to send files back and forth.  However,\nforget the old technology.  Dawn of a new day!  Enter the real world of ethernet..  You can do it!  I have faith in you.\n\nGood luck!\nKOZ\nhttp://www.affirmative-computer-services.com\ncomputer service phoenix
24446
There are ethernet connectors that actually connect to a USB port. I had one on my old desktop, and it worked fine (pretty inexpensive too!).
488995
The textbook definitions of Ethernet have little to do with current practice. Ethernet is supposed to be a single common medium with multiple connections. That may be true for older installations and laboratory environments. However, new desktop installations bring Ethernet to the desktop over phone wire and frequently build the spine using fiber optics. \n\nThe connection between the hub in the wiring closet and the adapter card in the PC forms a single point- to-point Ethernet segment between two stations. The connection to the rest of the LAN involves active electronics in the hub. In current use, this is done with a repeater that copies every bit and propagates collisions. \n\nA new generation of even smarter hubs provides a "bridge" connection between the main LAN and the phone wire. Only multicast messages and private messages specifically addressed to the PC are forwarded to the desktop. This has two advantages: \n\nIt provides greater security, because the desktop user cannot spy on traffic addressed to other nodes. \n\nIt provides each desktop user with an isolated, private 10 megabit data path free of collisions. The connection between hubs can then use a higher speed fiber optic protocol (such as "ATM") to deliver much greater performance than simple Ethernet. This hybrid (Ethernet to the desktop, something else between the hubs) represents a compromise of high performance and low cost.