What is the difference between networking hubs and switches?

Answer 1

a switch is more expensive and a network built with switches is generally considered faster than one built with hubs.

Yes.

And a hub just blatts all inputs to all outputs - effective, but data streams have to contend with each other, and data gets slowed down if many computers need to communicate, regardless of whether they are just communicating one-to-one, one-to-many or many-to-one.

A switch is like an old-fashioned telephone exchange - if two computers want to set up an exclusive one-to-one connection, the switch gives them a direct connection one to the other, and they get to communicate at wire speed - the native speed of the connection, say 100 megabits. Other traffic - so long's they are not involved - has no effect. Switches are the lowest-functionality "glue box" of choice.

The method of arbitration.

An Ethernet hub simply connects all ports together all the time. If a new device wishes to send a message and the line is busy it must wait until the line goes idle. When the line is idle any device may send, but if more than one device sends a "data collision" happens and all devices whose messages collided must go idle again wait for a random interval and check if the bus is busy again. This causes lots of waiting and resending slowing everything down.

An Ethernet switch keeps all ports isolated and any device can transmit messages on its port at any time. The switch knows the bus structure and which devices are connected to which port and examines the messages being sent to determine the routing needed and which port to connect it to.

If the port that a message needs to be routed to is idle, then the switch connects the two ports and passes the messages through (even if all other ports are busy). If the port a message needs to be routed to is busy a "data collision" happens on the sending port without disturbing the busy port or the port it is connected to via the switch. The one device on that one port must wait for a random interval before sending the message again. This dramatically reduces waiting and resending generally speeding up the bus.

Answer 2

hub:-if two frames arrive at the same time ,they will collide (or) the entire hub forms a single collision domain .

switch:-switch are similar to bridge .

switch is used to connect individual computers, there are individual port for individual computer ,so if we send a frame from A to B than it directly goes to B.

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Answer 3

Hub is like switch's father, people dont' use them any more because hubs put too much of pressure in networks.

Answer 4

main difference between hub and swith is that hub is for physical layer and switch is for data link layer,hub is non intelligent switch is intelligent etc

Answer 5

The difference between networking hubs and switches is that hubs are always online. Switches need to be turned off and on in order to transmit their information.

Answer 6

The Ethernet hub involves many different ports which connects PC's together. While the Ethernet Switch involves into smaller divided ports within the network.