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

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

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Computer Networking
In geosynchronous orbit, satellite

moves simultaneously
remains in a fixed position so that as earth rotates, it can fully cover the earth
None of these
remains in a fixed position related to points on earth
moves faster than the earth's rotation so that it can cover larger portion of earth.

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Computer Networking
The physical layer, in reference to the OSI model, defines

the interface between the X.25 network and packet mode device
the virtual circuit interface to packet-switched service
data link procedures that provide for the exchange of data via frames that can be sent and received
All of these
None of these

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Computer Networking
HMP (Host Monitoring Protocol) is:

a protocol that handles error and control messages
None of these
a protocol used to monitor computers
a TCP/IP high level protocol for transferring files from one machine to another.
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address

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