Networking Basics and requirements:
1- Ethernet is easily the most popular networking system available today. It is also one of the widest ranging systems. The equipment needed for an Ethernet-based network can be as simple as two network interface cards (NIC) and a cable, or as complex as multiple routers, bridges and hubs. It is this versatility that makes it so useful to businesses. A 100-Mbps card costs about: $15 to $40, and a 10/100-Mbps card costs about $25 to $50. To connect more than two computers using Ethernet, you will need a hub .The hub takes the signal from each computer and sends it to all of the other computers in your Business. Hubs come in several sizes, noted by the number of ports available -- a four-port hub can connect four computers, an 8-port hub can connect up to eight computers and so on. Most hubs are stackable.
A stackable hub has a special port that can connect it to another hub to increase the capacity
2- Firewalls: A firewall is simply a program or hardware device that filters the information coming through the Internet connection into your private network or computer system. You use a firewall to protect your business network from offensive Web sites and potential hackers. If an incoming packet of information is flagged by the filters, it is not allowed through.
3- The COMMUNICATIONS CONTROL UNIT: Is an interface between the communications line and the computer. The communication control unit is basically a peripheral device that purifies data transmission signals and relieves the computer of unnecessary monitoring duties. It is also called the ROUTER.
Wireless networks are the wave of the Internet future. Wireless networks utilize the information capacity of the Internet along with other capabilities such as sharing wireless resources like printers. Wireless...