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Unguided Media: Wireless
- A Wireless communication transporting electromagnetic waves without a physical conductor
Wireless Propagation Methods
- Ground - radio waves travel by lowest portion of atmosphere hugging the Earth
- Distance is depends on power of signal
- Sky denotes higher-frequency radio waves radiate upward into ionosphere and then reflect back to Earth
- Line-of-sight means high-frequency signals transmitted in straight lines directly from antenna to antenna
Propagation Methods
TCP (Transmission Control Protocol) and UDP are used by TCP/IP. SPX (Sequenced Packet Exchange) is used with IPX. NBP (Name Binding Protocol) is used with Appletalk.
explain Learning Bridges in deatil.
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The most expensive method of accessing the Internet is to employ leased lines that directly connect to the ISP. This will enhance access rate to anywhere between 64 K and 1.5 Mbps,
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