This is actually just a modem. A hub is a device with multiple ports for connecting computers to each other. A hub is now rarely used as a network switch is a faster more reliable device. Confusion comes from people like BT who supply what they call a home hub, which is actually a wireless router, they use the term home hub to refer to the central point (as in hub of a wheel) connection, probably because it's bright young designers never heard of a network hub! A modern wireless router normally consists of a combined router, 4 or 5 port network switch and wireless access point in one, and a non wireless one is the router and network switch Mohammad Talha 009746411902
hub store to data data link
switch store to data physical layer
hub used multicasting
switch used to unicasting
What is the difference between a data card and an usb modem?
yes
Nothing. They are both modems (MOdulator/DEModulator).
A USB modem plugs into your USB port.A "normal" modem plugs into your RS232 port or your parallel port.
a wireless router is needed when internet modem doesn't have wireless capability.
Port speed is how fast the computer talks to the modem. Modem speed is how fast the modem talks across the phone line to the other modem.
Routers,switches,internal modem,external modem,hub,etc.
A freewheel hub dose not make the pedals go forward when the backwheel is turning, a track hub dose.
An internal modem is housed within the main computer. An external modem is on the outside of the computer and connected to the computer with a cable.
There is a difference if you are using a low quality router. For good routers you will not notice any difference. Usually there is no difference at all.
Telephone is Cat3 while the cable coming form the modem is Cat5
Usually a cable modem is about 30 mbps and DSL can up to 768 kbps.