NETWORKING COMPONENTS By Jessica Tolson LTEC 4550

Firewalls are used to protect from malicious inbound network traffic as well as protect the company inside by not allowing certain outbound traffic. Built in software allows you to create access lists as controlling mechanisms. Placed in front of your router, it serves as a protection point between you and the rest of the world. Example Cisco ASA 5505 Newegg.com $ Example Checkpoint 620 Newegg.com $376.83

OSI and the Firewall

Joins multiple networks together. Sends information packets Determines the best route to send packets Routers are placed by the gateway. Example Cisco Small Business Router Newegg.com $ Example Ubiquiti Network Router Bphotovideo.com $309.95

OSI and the Router

Stopping point for data between networks. Translator between two systems Routes internal traffic between LANs Can be built in with routers, switches and firewalls Place between the network router and the switch Example Dialogic DMG1008DNIW Digital Gateway Truedataonline.com $1909 Example Dell SonicWALL SRA 4600 Walmart.com $1750

OSI and the Gateway

Uses MAC addresses in data packets to transport data Supports 10/100/1000 Ethernet Capable of inspecting data A switch situates between the gateway and internal LAN - Sometimes a bridge and sometimes workstations, servers or other network devices. Example Cisco SG Newegg.com $169 Example Cisco WS-C3560G-48TS-S Advanteco.com $2395

OSI and the Switch

Software or hardware that connects two or more networks Two different networks that need to exchange information The bridge receives connection from the switch. Different LANs on either side can use the bridge to talk to one another. Example TRENDnet TPA-311 Newegg.com $36.99 Example TRENDnet Tew-640mb CompSource.com $60.17

OSI and the Bridge

Connects multiple network devices together Shared link Uses broadcast method Collisions The hub receives network connection from the switch port. The hub can then share out the one link with different network devices. Example Netgear GS NAS Newegg.com $39.99 Example Netgear 8 Port 10/100 Newegg.com $27.62

OSI and the Hub

Provide wireless access Connected to a network device that provides internet access Portable Free to Roam, Free to work, Free to Play Example Linksys WAP300N Newegg.com $77.15 Example ASUS EA-N66 Walmart.com $89.24

OSI and the Wireless Access Point

REFERENCES center/what-is-a-firewall.html center/what-is-a-firewall.html g/bldef_switch.htm g/bldef_switch.htm network-bridge network-bridge routers-access-points-differ#1TC=windows-7 routers-access-points-differ#1TC=windows-7