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Computer Networking

Computer Networking
What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

4
3
2
None of these
6

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Computer Networking
The core diameter of a single-mode fibers is about

10 times the wavelength of the light carried in the fiber
10 times the fiber radius
7 times the light carried in the fiber
3 times the wavelength of the light carried in the fiber
None of these

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Computer Networking
Which of the following commands sets a trunk port on a 2960 switch?

trunk on
trunk all
switchport mode trunk
switchport trunk on

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Computer Networking
A 2000-character text file has to be transmitted by using a 1,200 baud modem. Can you tell how long will it take?

120 seconds
None of these
12 seconds
20 seconds
2 seconds

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Computer Networking
Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain?

STP
VTP
ISL
DHCP

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Computer Networking
Which of the following uses ATM as the Data Link layer protocol that's terminated at what's known as the DSLAM?

Dedicated T1
PPPoE
Frame Relay
DSL
Wireless

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