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- Google is amazing - learn how to use it properly
- Addresses and Payload
- Controlled access protocols
- Polling
- Asks if want to talk every once in a while
- Reservation
- High bandwidth, slow
- Token passing
- 1 token, passes around, only when u can token can u talk
- Channelization Protocols
- Random Access Protocols
- ALOHA
- One big one in the center, smaller ones on the peripheral
- 2 different frequencies, one for sending one for receiving
- CSMA/CD = Ethernet
- Carrier Sense = Listen before transmitting
- Multiple Access = Everyone can hear everyone else
- Collision Detection = Detect collisions deal with them
- CSMA/CA
- Wireless has different transmission thing
- 4 addresses, 4th one doesn’t matter
- Ad 1 = destination
- Ad 2 = source
- Ad 3 = leftover
- SSID
- Service set identity
- Basically wifi name
- To send a message along LAN backbone
- Has to have at least 1 packet
- 1 packet is foundation, smallest chunk
- Access point changes ethernet to wifi
- Outer layers change; payload (data) remains unchanged
- Wired and wireless packet types
- Access points are translation bridges
- From 802.11 to ethernet and from ethernet to 802.11
- The data/frame body
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