34 lines
967 B
Markdown
34 lines
967 B
Markdown
# lec22
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_This is continuation of previous lecture where MAC protocols are covered in brief._
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## Taking turns
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Let's now describe various methods to achieve turn taking.
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1. _polling_:
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* master invites slaves to transmit data
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2. _token rings_:
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* control token passed from node to node
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## ARP: Address Resolution Protocol
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Protocol to determine MAC address on a given device in a network.
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Upon association the protocol will emplace an entry into the target device's `arp table` where we record MAC and IP address associations.
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# Wireless links
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Interference: everything will cause interference which means we expect interference.
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Primarily for wireless connections: _Code Division Multiple Access_(asynchronus kinda)
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### CDMA
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Each node receives a code which it uses to splice transmissions across the wireless link.
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Each node may transmit data at an arbitrary rate since the transmissions splice into each other forming a consistent signal cumulatively.
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