0
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.
What else can I help you with?
What is the diff between hubs and switches?
Please see:What_is_the_difference_between_a_hub_and_a_switch
What difference between switches and hub?
The difference is in the way how they process communications between two or more computers. If you send some information to one computer only using hub it will resend the information to all computers in the network. When switches resend information to the only one computer.
Major components of Networking Devices?
The basic computer hardware components that are needed to set up a network are Routers, Repeaters, Hubs, and Switches, Bridges, Network Interface Card and Network Cables. you can find all these devices at cyprus pc. Cyprus-PC is the best online store to buy computers, computer accessories, networking equipment, laptops, desktops, routers, wifi routers, etc. from the top brands at the best prices in Nicosia, Limassol, Larnaca, Paphos and whole of Cyprus.
Which two networking devices are used to connect hosts to the access layer?
Hubs and Switches
How do hubs segregate packets?
Hubs segregate packets because hubs are used as switches. Through a VLAN, hubs, when used as switches, can easily segregate incoming and outgoing traffic.
What are the purposes of switches and hubs?
Switches increase the number of collision domains in the network.
When is the appropriate time to replace hubs with switches?
As soon as possible. Switches are much more efficient than hubs because hubs send the data to all the connect nodes, unlike switches that only forward packets to the appropriate node. Hubs cause a lot of packet collisions which reduces the efficiency of your network. __________________ I was going to say "Now, because switches are so cheap". But your answer is better.
Where can I find a magazine about network hubs and switches?
There is no magazine that is specific to network hubs and switches. However, PC Magazine is a computer magazine available on newsstands and MozillaQuest (http://mozillaquest.com/index.html) is an online magazine that may include articles and other information on network hubs and switches.
What connects networks of the same type?
Switches, hubs...
What are the similarities between a switch and a hub?
Both switches and hubs are networking devices used to connect multiple devices in a local area network (LAN). However, a key similarity between them is that they both operate at the data link layer of the OSI model. Additionally, both devices forward data packets to their destination based on the MAC address of the devices connected to them. Despite these similarities, switches are more advanced than hubs as they can intelligently forward data packets to specific devices based on their MAC addresses, while hubs simply broadcast data to all connected devices.
Why it is easier to scan a network that is connected with Hubs rather than with Switches?
It is easier to scan a network connected by hubs than by switches because a switch can limit traffic between subnets, whereas a hub cannot, and would therefore require more overhead to facilitate a scan.
Which usually connects a LAN togeather?
hubs, switches or routers.
