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The data link layer. Skills : none IT concepts : LAN, medium access, Ethernet and WiFi protocols, why standards win. This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. . Internet concepts Applications Technology (communication) - PowerPoint PPT Presentation
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The data link layer
Skills: noneIT concepts: LAN, medium access, Ethernet and WiFi protocols, why standards win
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
• Internet concepts– Applications– Technology (communication)– Implications for
• Internet skills– Application development– Content creation
Where does this topic fit?
TCP/IP protocol layers from 1,000 feet up
Application
Transport
Internet
Data link
Physical
Programs that do useful work like retrieve Web pages, copy files, send and receive email, etc.
Make client-server connections and optionally control transmission speed, check for errors, etc.
Route data between networks
Route data within the local area network
Specify what medium connects two nodes, how binary ones and zeros are differentiated, etc,
The view from 2,000 feet
Networks inside the cloud
The router at the edge of each network
The LANs and the Internet
Data linklayer
Data linklayer
Internet layer
A simple LAN combining data link (Ethernet and WiFi) and internet (IP) protocols in one box
A complex LAN may have many switches and routers
Data link layer protocols
Ethernet (copper and optical fiber)
WiFi (physical and data link)
101011010101010101101010111010101011
101011010101010101101010111010101011
Transfer data and check for errors
Medium access control
WiFi and Ethernet won because they were
Open
Dynamic
(WiFi was also license free)
The data link layer
Skills: noneIT concepts: LAN, medium access, Ethernet and WiFi protocols, why standards win
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
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