1 / 12

Network Components

Network Components. T. Meredith 5460 – Summer 2014. Basic Components of a Computer Network. Hub/Switch Router Bridge Gateway Firewall Wireless Access Point (WAP).

Download Presentation

Network Components

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Network Components T. Meredith 5460 – Summer 2014

  2. Basic Components of a Computer Network • Hub/Switch • Router • Bridge • Gateway • Firewall • Wireless Access Point (WAP) Not all components are used in every network environment – however, this presentation discusses all of them since any or all may be present in networks you will support…

  3. Hub • Transmits data from one port/device to all other devices connected to the hub • Operates on Layer 1 of OSI model • Rarely used today, replaced by switches • Price: NA/obsolete http://upload.wikimedia.org/wikipedia/commons/thumb/d/d9/4_port_netgear_ethernet_hub.jpg/300px-4_port_netgear_ethernet_hub.jpg Today, hubs are usually superseded by…

  4. Switch • Transmits data from one port/device to another port/device connected to the switch, correctly identified by MAC addresses, ATM, or MPLS; only sends data to correct port/device, unlike hub • Operates on Layer 2 of OSI model • Price: $25 - $3000 (as pictured, $825) http://img.directindustry.com/images_di/photo-g/rack-mount-managed-ethernet-switches-66478-5577201.jpg Diagram of hub/switch placement in a network

  5. Hub vs. Switch - clarifying differences… http://content.answcdn.com/main/content/img/CDE/HUBSWIT.GIF https://www.youtube.com/watch?v=JtTkW6pFxls

  6. Bridge • Does many of the same things as a switch, BUT does not use ATM or MPLS (MAC addressing only) • Typically connects two different parts of the same LAN • Price: $30 - $17,000 and up (as pictured, $100) http://www.foundvalue.com/upload/images/products/alindo_632837444737955000_linksys_wet11.jpg A bridge connecting two smaller groups of clients on a single LAN http://www.igcseict.info/theory/4/hware/files/stacks_image_7406_1.png

  7. Router • Transmits data packets between networks by using routing table to determine proper destination • May include switch, firewall, or other network functions all in one device • Price: $30 - $600 (as pictured, $62) http://www.wikimedia.org/wikipedia/commons/3/34/Linksys-Wireless-G-Router.jpg A simple network showing a router connecting a LAN to the Internet http://www.igcseict.info/theory/4/hware/files/stacks_image_7380_1.png

  8. Gateway • Similar functions as a router, but more complex since it can be used to connect two different networks (e.g., LAN and WAN/Internet) using different protocols (e.g., VoIP) • Can operate at any OSI layer • Cost: $40 - $17,000 and up (as pictured, $630) http://www.logicsupply.com/daq-ml250/# An example of a residential gateway on a simple home network http://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Homenet.svg/310px-Homenet.svg.png

  9. Firewall • Protects a network by blocking unrecognized/unauthorized traffic from outside the LAN • Can be a physical device OR software running on a router or other computer • Price: $5/year minimum (software license), up to $2,000 Cisco rack-mountable devices (as pictured, $640) http://eandt.theiet.org/magazine/2013/08/images/640_cisco-asa-firewall.jpg The position of a firewall between a LAN and the Internet http://www.igcseict.info/theory/4/hware/files/stacks_image_7419_1.png

  10. Wireless Access Point (WAP) • Broadcasts a WiFi signal to allow wireless devices to connect to a wired network • Usually connected (wired) to a router, but some WAPs and routers are single integrated units • Price: $25 - $3,000 (as pictured, $1100) http://img.directindustry.com/images_di/photo-g/wireless-access-points-waps-61398-3133227.jpg A wireless access point added to a network http://www.pcguidebook.com/images/usingaprintserver.gif

  11. Network Diagram Often integrated (or Gateway)

  12. References • Black, U. D., & Habraken, J. W. (2009). Sam’s teach yourself networking in 24 hours. Indianapolis, Ind: Sams. • All prices from: http://www.cdwg.com (accessed July 7, 2014) • All images/media credited in individual slides

More Related