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Computer Networking

Computer Networking
Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?

Layer 3
Layer 7
Layer 4
Layer 2

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Computer Networking
How often are BPDUs sent from a layer 2 device?

Never
Every 10 minutes
Every 30 seconds
Every 2 seconds

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Computer Networking
What frequency range is used for TV transmission and low power microwave applications?

None of these
Very Low Frequency : 3 kHz to 30 kHz
Ultra High Frequency : 300 MHz to 3000 MHz
Super High Frequency : 3000 MHz to 30000 MHz
Medium Frequency : 300 kHz to 3 MHz

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Computer Networking
Which of the following communications lines is best suited to interactive processing applications?

simplex lines
None of these
full-duplex lines
mixed band channels
narrowband channels

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Computer Networking
Which of the following protocols uses both TCP and UDP?

SMTP
Telnet
FTP
DNS

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Computer Networking
You want to run the new 802.1w on your switches. Which of the following would enable this protocol?

Switch# spanning-tree mode rapid-pvst
Switch(config)# spanning-tree mode 802.1w
Switch(config)# spanning-tree mode rapid-pvst
Switch# spanning-tree mode 802.1w

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