Computer Networking
What frequency range is used for microwave communications, satellite and radar?

Medium Frequency : 300 kHz to 3 MHz
Low Frequency : 30 kHz to 300 kHz
None of these
Super High Frequency : 3000 MHz to 30000 MHz
Extremely High Frequency :30,000 MHz

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Computer Networking
You are working with a network that has the network ID 10.9.0.0 and contains 73 networks. In the next year, you will be adding an additional 27 branch offices to your company. For simplified management, you want to keep the most possible hosts per subnet. Which subnet mask should you management, you want to keep the most possible hosts per subnet. Which subnet mask should you use?

255.240.0.0
255.252.0.0
255.224.0.0
255.254.0.0
255.248.0.0

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