LTEC 4550 – Assignment 3

Ruben Rico

HUB

• Hubs are used to connect multiple computers together

• Broadcast same message on all ports (less secure)

• This device would be used for:

• Creating a private network

• Transferring data to another computer

• Decent 8 port hubs range from $49.99 to $90.00

Hub Diagram

Switch • A switch is better than a hub by: (layer 2 device)

• Only sending a message to the device that requested it

• Also allow fiber connection link

• Send Info faster

• Switches are used in offices and homes for day to day work.

• Depending on the ports, switch could cost from $10 to $200

Router

• Routers allow computers to connect together and also allow for connection to the internet. Routers can be found with built in modems so you can get a 2 in 1 device.

• Routers can be found in any environment

• Wireless routers can cost between $20 to $200

Bridge

• A bridge works by creating a connection between two separate computer networks or the divide one network into two. Both networks use the same protocol.

• Principle function is to forward data based on the MAC address of the sending and receiving devices

• Device may be used when you have two networks and you want to be able to exchange information between the two

• Price range is $45 to $150

Bridge

Gateway

• A Gateway is used to connect two networks on different subnets (255.255.0.0)

• These are mostly used in corporations with large networks that need to join their different subnets together

• Range from $40 to $1000

Firewall

• A firewall blocks packets from entering your network

• Rules must be set to drop packets that are not allowed in

• Example “adapter A ip src addr 192.168.1.147 dst addr any tcp src port 20 dst port 80”

• Firewalls are usually built into some routers so households will have them. Dedicated hardware firewalls will be found in corporations

• Price range is $120 to $5000+

Wireless AP

• Wireless AP plug into a switch/hub and broadcast wireless signal to wireless devices

• AP’s need to be configured properly (security wise) to prevent unauthorized access

• You can find AP in a lot of businesses that offer free Wi-Fi and homes will have them. Typically routers will offer built in Wi-Fi so an AP will not be needed

• Price range is $20 to $200

Network Diagram