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Computer Networking

Computer Networking
Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?

xDSL
IPSec
HDLC
Cable
VPN

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Computer Networking
Establishing a virtual connection is functionally equivalent to

Physically connecting a DTE and DCE
Placing a modem prior to a conversation
Connecting as virtual memory
Placing a telephone call prior to a conversation
None of these

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Computer Networking
Avalanche photodiode receivers can detect hits of transmitted data by receiving

400 photons
100 photons
None of these
200 photons
300 photons

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Computer Networking
What is the port number for HTTP?

80
99
86
23
None of these

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Computer Networking
Repeaters are often used on an 802.3 network to help strengthen the signals being transmitted. As with the length of segments and the number of segments, a limit exists as to how many repeaters can be used between any two nodes. What is the maximum number of repeaters that can be used?

Three
Five
Two
Four
Six

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Computer Networking
Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a medium speed line or a low speed line. Find the total number of topologies.

48
ARP.EXE
81
729
12

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