I think firewalls can be both software and hardware. When you buy computers, it will usually always come with a limited time only antivirus and firewall.
The pieces software that runs the hardware in your computer are called Drivers. These either come built in to your Operating System, or they come from another source such as the Internet or an Install CD/DVD.
There is no command-line firewall or filter that I know of that is available for Windows. Usually hardware or software-based firewall or filter solutions will come with their own interface (usually web-based or graphical).
Many routers come with hardware support built in to protect your connection from those attempting to hack or disrupt your service. Many netgear routers come with firewall support built in, as do buffalo and D link router equipment.
Business firewall software will protect each of the computer systems it is installed on. They often come with antispyware, antivirus, antispam, and content filtering options.
Very slow or fast transmission speeds become from what combinations of hardware and software?
Most do not, you can buy a standalone hardware firewall if you wish to do so.
No, it may come with other software such as backup utilities though.
Some network hubs have them installed for protection
They are more valuable than hardware developers because software controls how hardware works. If your thinking about becoming one you should work for a company that is popular such as working for Symantec Corp. If you do become a software developer you will have one of the most popular computer jobs there is. Software is becoming better everyday you could come up with some new software, but make sure it is helpful to the buyer not you.
wireless router is a hardware A modern router (wireless or not) is a box that has the electronics and connections (network port connectors, radio transmitter/receivers, antenna) to allow receiving and sending of network data. It also has software (usually firmware) to allow management of the router functionality and to perform the actual routing functions. Routers come with builtin software supplied by the manuacturer. Sometimes the manufacturer supplies updates to the router software to fix prolems in the router or to add functionality. Many routers can also be loaded with software provided from alternate none manufacturer sources to enhance its functionality or to repurpose the router entirely.
Device Drivers... These generally come with the new hardware. Otherwise you can obtain them from the manufacturers website in the support section.
It is selected based on how well it will work. The IT director will also look at the features and security that come with it.