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Computer Networking

Computer Networking
Working of the WAN generally involves

None of these
telephone lines
satellites
microwaves
All of these

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Computer Networking
An error-detecting code inserted as a field in a block of data to be transmitted is known as

None of these
Error detecting code
Frame check sequence
Checksum
flow control

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Computer Networking
What is the main difference between DDCMP and SDLG?

SDLC does not use CRC
None of these
SDLC has a IP address
DDCMP does not need special hardware to final the beginning of a message.
DDCMP has a message header

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Computer Networking
Which of the following ISO level is more closely related to the physical communications facilities?

Data Link
Networking
Application
Session

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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
12
ARP.EXE
81
729

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Computer Networking
Different computers are connected to a LAN by a cable and a/an

None of these
special wires
interface card
telephone lines
modem

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