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Let's imagine 3 people with very similar voices, trying to communicate. If two of them start talking at the same time, the third person would hear a mixture of their voices and not understand a thing. This person will usually say "hey, not together! One of you must wait, while the second talks!"
A similar thing happens with, say, 3 computers on one LAN segment. Computer A wants to send some information to computer B, and computer C wants to communicate with computer B also. The rule is, that if one device is transmitting, other devices listen, and wait for the transmission to end, before they start transmitting themselves.
But it may happen, that after a period of "silence", computers A and C decide to start "talking" at the same moment, and their signals collide on the network. The procedure is, that if they sense that a collision took place (by listening to their own transmission and "hearing", that the signal gets distorted), they both stop sending signals and wait a split second. The ingenious thing is, that each one waits for a randomly chosen time length, and hence one will restart transmission sooner - and will be able to finish, because the rule is "one talks, rest listens".
The physical nature of a collision. Network communications happen by means of electrical signals. Putting it simple, when a device is "talking", it forces a series of voltage changes in the circuit. If two devices want to force a different series of voltages in the same circuit, the result will be rubbish, because each will try to force their voltage, one counteracting the other. Each device, as I said before, listens to what it is transmitting, and if it senses, that the voltage in the circuit is different to what it was trying to force (in other words - that the transmission is getting corrupted) - it knows, that a collision is taking place and they should stop, and wait for a random period.
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If hub is replaced with switch is there any changes in collision domain?
In most modern-day network switches, collision is no longer a problem. Network switches are good at handling these situations to avoid collision problems.
What is the portion of a network in which collisions occur?
collision domain
Line access and avoidance of collision are the functions of?
network protocols
Which topology divides the collision domain and provides full media bandwidth to the hosts in the network?
Sw1-sw2 divides the collision domain and provides full media bandwidth to the hosts in the network.
Is the characteristics of hub is multiple collision domain?
A hub has a single collision domain, which is why it can cause problems when network traffic is high.
What happens in csma CD when a node detects that its has suffered a collision?
It signals to the network that its data was damaged in a collision, waits a brief period of time before checking the network for activity, and then retransmits the data.
What does implementing a lan switch reduce?
Lan switches eliminate collision domain. A single collision domain in a network would mean half duplex as it can only send or receive at one time. each port of a switch is considered a collision domain in itself. so more the number of collision domain , better for the network.
How does a layer 2 switch create collision domains?
When using network switches, each port on the switch is its own collision domain.
What happens in csma CD when a node detects that its datahas suffered a collision?
It signals to the network that its data was damaged in a collision, waits a brief period of time before checking the network for activity, and then retransmits the data.
What happens in csma CD when a node detects that is data has suffered a collision?
It signals to the network that its data was damaged in a collision, waits a brief period of time before checking the network for activity, and then retransmits the data.
What is collusion domain?
A computer network can be segmented physically but also logically. A collision domain is one of the logical network segments in which the data packets can collide to each other. One of the most common protocols used when referring to a collision domain is the Ethernet protocol. Collision domains are often referred as 'Ethernet segments'. The term of 'collision domain' is also used when describing the circumstances in which a single network device sends packets throughout a network segment and forces every other device in that network segment to pay attention to those packets.
How do you prevent collisions in a broadcasting domain?
You can't eliminate collision in a broadcasting domain. What you can do is to increase the number of collision domain within a broadcasting domain by using more switches. this will improve your network traffic because the more the collision domain, the better is your network in terms of data transmission performance.
