Networking → Re: Network Bandwidth question-please help

thank you all for your help...you gave me all the answers I wanted to know

Just in case any of you will read this,I did some searching and found this:

"Ethernet uses a protocol called CSMACD. This stands for "Carrier Sense, Multiple Access, Collision Detect". The "Multiple Access" part means that every station is connected to a single copper wire (or a set of wires that are connected together to form a single data path). The "Carrier Sense" part says that before transmitting data, a station checks the wire to see if any other station is already sending something. If the LAN appears to be idle, then the station can begin to send data. "

Doesn't this protocol negate what full duplex connection should be able to do-that is to be able to send and receive data at the same time.
Or does this have to do with the topology of LAN.Meaning that two PCs can send and receive data from eachother,but if they both send it in the same direction,at the same time(to some router),then collision occurs?

thank you again for your time

CSMA-CD is how the original thickwire Ethernet was designed. Remember this was back in the days where all the transceivers were directly connected to the cable.

Modern Ethernet uses switches to eliminate the collision domain. Switches allow Ethernet to be full duplex. CSMA-CD is maintained for backward compatibility in the slower speed Ethernet 10 and 100 Mbps.

/Tom

I don't want to drag this forever but my PCI adapter is 10/100 Mbit.Is it full duplex?

thank you

If you connect your 10/100 NIC to a 10/100 switch it will run 100 megabit full duplex. If you connect it to a 10 megabit hub, it will run 10 megabit half duplex.

I have 1-port broadband router

You will have to check the specifications of the router. Most likely it is 10 megabit, but it could be either half or full duplex. As long as it is faster than your Internet connection, it doesn’t make much difference.