Date post: | 24-Dec-2015 |
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And how they are used
Hubs send data to all of the devices that are plugged into them. They have no ability to send packets to the correct ports.
Cost~$35 to over $500
Switches are a step above Hubs. This is because a switch does not flood all exit ports with the same data. Just the port that needs the message will receive the message.
Cost $15 to well over $3,500
Routers are smarter switches. They can be configured for better traffic flow. They work at the Layer 3 of the OSI model. Routers use the IP address destination to determine which port it will send out the packets. Routers have fewer ports than switches.
Cost $35 to over $1,000
Bridges use MAC addresses to forward traffic. They can be used to bring together two dissimilar LANs.
Bridges are very similar to Hubs and Switches.
Cost $30 to ~$3,000
Gateways connect your LAN to the outside world. This process can be handled by servers that could also acting in other rolls as well.
Cost $45 to over $1,600
Firewalls can either be software or hardware. This could be software on a router, or even on a computer. They could also be a separate device in the server room. These devices help to keep out unwanted intruders.
Cost $30-$4000+
The brick wall is
the “firewall” in
this picture.
This is one point
at which a
firewall can be
installed.
Example of a firewall
WAPs are devices on a network that enables the user to connect with the network with no cables. These can be easily installed. However, the security is not as strong as a wired network.
Cost: <$100-$5000+