Computer Networking Components Chad DuBose ~ Assignment #3 ~ LTEC 4550.020
Hub • Hardware device that enables multiple connections to a computer • Broadcasts all data across each connection (no routing tables) • An example is a USB hub. The hub allows several USB devices to connect to a single node. The USB hub simply connects to the USB port on a computer. • The price of a simple USB hub is between $10 - $20
Switch • Hardware device that can connect multiple nodes together within a LAN. A switch can be used to setup a home network between devices. • Operates at layer two of the OSI model using routing tables. Interprets source and destination devices and forwards data to the intended device. • Consumer switches are between $25 - $30
Router • Hardware device that connects multiple networks together such as local area networks (LAN) and wide area networks (WAN). • The router operates at layer 3 of the OSI model. It can be used in a home network (wired or wireless) to connect to a WAN such as the Internet. • The cost of consumer model router is between $80 - $200
Bridge • Hardware device that connects multiple notes and reduces the amount of traffic on a LAN. • Operates at layer 2 of the OSI model. Inspects data frames to determine source and destination, then forwards to the intended device if no errors are detected. A bridge can be used in a home network (wired or wireless). • The cost of a consumer model is between $60 - $250
Gateway • Hardware and/or software that join together two networks of different protocols. • A network gateway operates at any level of the OSI model and can typically include a firewall. It uses Ethernet MAC addresses for routing. In example, a broadband router would be used as a gateway in a home network. • A consumer price for a gateway would be between $90 - $150.
Firewall • Hardware and/or software that prevents hacks and viruses from reaching a computer over the internet. Firewalls can be placed in each node, as well as, in the router to protect a network. • A firewall inspects data packets to determine if they should be allowed in the network or node based on a set of rules and protocols. It can perform basic routing functions. • An average price of a firewall software is between $35 - $70.
Wireless AP • Hardware device with a network adapter and radio transmitter that functions as an access point to transmit and receive WLAN radio signals. Can be a stand alone device or part of a router. • Typically connects to a wired network and broadcasts WIFI signals to other devices. Wireless AP’s can be used in a home network and usually follow IEEE 802.11 standards. • A Wireless AP would cost between $45 - $120.
Network Diagram Printer Internet Wireless AP Switch Bridge Gateway Server