You will need to purchase and install an adapter and attach it the the USB connector located on the motherboard.
You need an HDM, DVI or VGA for connecting a monitor depending on the monitor you have. If you do not have any extra ports there are adapters available to convert usb to one of the signals needed.
The Atom N270 laptop has three USB 2.0 ports.
There is no minimum or required number for USB ports on a laptop. Depending on the age and design of the laptop, it could be anywhere from zero to ten. I have seen only 2 USB ports on older laptops, most of the new ones atleast have 4 USB ports. Netbooks(10" & 11") have not more than 2 USB ports. If in anycase you need more USB ports, you could buy an USB hub for as less as 10$, which will add 4 more ports to your laptop.
Yes, they can be attached via the USB ports, there are many USB docking stations available that support various kinds of other ports. You should have a look at Amazon.com to check which one suits your needs.
All national ports have been closed.I need more USB ports on my laptop.
USB ports
Most modern laptops lack any sort of "legacy" ports such as serial ports, let alone them having two. Some older laptops did have multiple serial ports, but there's little point in recommending one because there's no guarantee you could find one. There are options for adding serial ports to a laptop, such as a USB to serial adapter, or a PC card with additional serial ports.
Certainly ... doesn't have to be the same brand name to be compatible. I have a Dell Desktop and a Samsung monitor. Should have some extra ports on the laptop rear panel for monitors and printers, etc.
You need to place the USB fan cooler beneath your laptop and connect it to one of the ports for it to cool your laptop.
Yes you ccan get a memory card reader for a laptop that connects via USB ports.
Well depending on what usb ports it has usb 3 ports are the best to use.
No, you can't. Laptops have its own ports. If you want to upgrade your laptop video card, you need to make sure that your laptop has proper ports (mini PCI-E). And then get a video card which will fit that port.