Cisco gigabit switches can be found in both 24 and 48 port varieties, commonly. Of course, with the ever changing field of technology, this information could be outdated very quickly.
You mean Ethernet switch? There are many of them: 3COM, ASUS, CISCO, D-Link, Edimax, Linksys (now part of CISCO) and many others.
The command "show vtp status" will show you how many vlans are supported by the switch. The Cisco 2950 switch supports up to 64 VLANs.
1
On the contrary, the Cisco Catalyst 2960 is a very well-known product. This switch is widely used in many small businesses. There are few which are unhappy with this switch.
A router will typically support between 4 and 8 ports. For additional ports, a standard Ethernet switch can be connected to one of the ports.
While Cisco does provide excellent phone services, there are many other providers. Try researching other providers on the web.
2 Ports on the router however you can add more cards to the device. In a 2821 you can add 4 cards such as WICs and in a 2811 you can add 2 cards.
Switch is faster than HUB. If you are using managed switch you can create VLAN, you can secure ports and many other things.
The Cisco router 2811 comes in one speed which is 10/100. It has two ports and is a great wired router for small to medium business IP solutions and needs.
the Highest I heard is 576 port
There are typically 5 to 24 ports on a network switch, though real high end switches can house more. Internally the ports are connected with copper wires.