Post on 18-Jan-2018
description
NETWORKING COMPONENTSBy Jessica Tolson
LTEC 4550
Firewall
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 $335.69
ExampleCheckpoint 620
Newegg.com $376.83
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
OSI and the Firewall
Router
• Joins multiple networks together.
• Sends information packets
• Determines the best route to send packets
Internet Gateway
Router
Routers are placed by the gateway.
ExampleCisco Small Business RouterNewegg.com $157.99
ExampleUbiquiti Network RouterBphotovideo.com $309.95
OSI and the Router
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
Gateway
• 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
Gateway
SwitchRouter
ExampleDialogic DMG1008DNIW
Digital GatewayTruedataonline.com
$1909
ExampleDell SonicWALL SRA
4600Walmart.com $1750
OSI and the Gateway
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
GatewayGateway
Switch
• Uses MAC addresses in data packets to transport data
• Supports 10/100/1000 Ethernet
• Capable of inspecting data
Switch
Bridge
Gateway A switch situates between the gateway and internal LAN - Sometimes a bridge and sometimes workstations, servers or other network devices.
ExampleCisco SG300-10
Newegg.com $169
ExampleCisco WS-C3560G-
48TS-SAdvanteco.com $2395
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
OSI and the Switch
Bridge
• 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.
ExampleTRENDnet TPA-311Newegg.com $36.99
ExampleTRENDnet Tew-640mbCompSource.com $60.17
OSI and the Bridge
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
Hub
• 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.
ExampleNetgear GS108-400NAS
Newegg.com $39.99
ExampleNetgear 8 Port
10/100Newegg.com $27.62
OSI and the Hub
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
Wireless AP
• Provide wireless access
• Connected to a network device that provides internet access
• Portable
Wireless AP
Switch
Free to Roam, Free to work, Free to Play
ExampleLinksys WAP300N
Newegg.com $77.15
ExampleASUS EA-N66
Walmart.com $89.24
OSI and the Wireless Access Point
Application
Presentation
Session
Transport
Network
Data Link
Physical
7
6
5
4
3
2
1
Internet
Router
Switch
Bridge
Firewall Gateway
Hub on LAN B
Wireless APLAN A
LAN B
LAN C
REFERENCES• https://
www.paloaltonetworks.com/resources/learning-center/what-is-a-firewall.html
• http://www.linktionary.com/g/gateway.html
• http://searchnetworking.techtarget.com/definition/router
• http://compnetworking.about.com/od/hardwarenetworkgear/g/bldef_switch.htm
• http://windows.microsoft.com/en-us/windows-vista/what-is-a-network-bridge
• http://www.computerhope.com/jargon/h/hub.htm
• http://windows.microsoft.com/en-us/windows/hubs-switches-routers-access-points-differ#1TC=windows-7