A Beginner’s Guide Understandin g Networking Components LTEC 4550 Jeff Spradlin Fall 2013
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A Beginner’s Guide
Understanding Networking
Components
LTEC 4550 Jeff Spradlin Fall 2013
A World of Network Devices
• Some have exclusive purposes
• Some may have seen their functions integrated
• Discrete and Individual Units
What it does.
Source: http://www.automation-drive.com/ethernet-hubs
Network Hub
• Takes a signal and repeats it across all other ports on the device.
• Most hubs do not screen for error or collisions.
What it Connects to.
Source: http://www.automation-drive.com/ethernet-hubs
Network Hub
• Ethernet• Multiple computers
in a collision domain
Where it’s Used.
• Smaller, cheaper, older networks
• Single-direction connections
Actual Retail Price:$24-$69
What it does.
Source: http://snpi.dell.com/snp/images/products/large/A4527470.JPG
Switch
• Connects messages between units
• Builds a working topology
• Learns about its environment
What it Connects to.
• Different Network Segments
• Different Types of Networks and Mediums
Where it’s Used.
• Home and Office Networks
• Effective for two-way communication
Actual Retail Price:$107-$189
Source: http://snpi.dell.com/snp/images/products/large/A4527470.JPG
Switch
What it does.
Source: http://www.teqlog.com/wp-content/uploads/2012/02/Router.jpg
Router
• Directs Traffic on a Network
• Prioritizes Based on Protocol
• Forwards Messages
What it Connects to.
• Different End-Units or Segments
• Other Routers• Switches or the
Gateway
Where it’s Used.
• Everywhere.• Seriously, Everywhere.• Isolates Collision Domains
Actual Retail Price:$62-$1,100
Source: http://www.teqlog.com/wp-content/uploads/2012/02/Router.jpg
Router
What it does.
Source: http://www.crownaudio.com/media/storagebk/pressart/pr110_hz.jpg
Bridge
• Routes between groups and segments
• Uses MAC addressing for routing
What it Connects to.
• Network segments via Ethernet
Where it’s Used.
• Spanning tree networksActual Retail Price:$51-$2,900
Source: http://www.crownaudio.com/media/storagebk/pressart/pr110_hz.jpg
Bridge
What it does.
Source: http://www.linksz.net/images/ROIP-102.jpg
Gateway
• Connects a LAN to a wider Network
• Can act as the last stop before the Internet
What it Connects to.
Source:
• Any other network device
• Can interface with multiple protocols
Where it’s Used.
• May be integrated with Routers
• Used as a network Firewall
• Manage traffic in and out of Domain
• Maintain DNS
Actual Retail Price:$34-$32,000
Source: http://www.linksz.net/images/ROIP-102.jpg
Gateway
What it does.
Source: http://www.64bit.eu/galerie/3490/Juniper%20SRX%20650%20gateway%20firewall%202%20GB%20right%20angle%20view-gallery_pop.jpg
Firewall
• Protects Networks• External• Internal
• Limits or blocks traffic
What it Connects to.
• Physical port protection• Last Stop-Gap• LANs, WANs
and MANs
Where it’s Used.
• Hopefully everywhere• Home computing• Small business• Enterprise-level
framework
Actual Retail Price:$0-$263,000
Source: http://www.64bit.eu/galerie/3490/Juniper%20SRX%20650%20gateway%20firewall%202%20GB%20right%20angle%20view-gallery_pop.jpg
Firewall
What it does.
Source: http://www.bcsconsultants.com/mthosts/sequoia/bcs/media/images/WAP121.jpg
Wireless Access Point
• Converts wired connections to wireless
• Direct connection
• Relay for existing signal
What it Connects to.• May be integrated• Connect to:
• Ethernet• Coaxial• Fiber optic
• Transmits/receives• 2.4 and 5 GHz
Where it’s Used.• Home Office• Large-campuses• Anywhere cellular doesn’t
reach• Underground• Buildings• Moria
Actual Retail Price:$63-$13,000
Source: http://www.bcsconsultants.com/mthosts/sequoia/bcs/media/images/WAP121.jpg
Wireless Access Point
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