Atechnician has verified that a recent loss of network connectivity to multiple workstations is due
to a bad cat5 cable in the server room wall. which of the following tools can be used to locate its
physical location within the wall?
a. cable certifier
b. multimeter
c. cable tester
d. toner probe

D. Toner probe

Explanation:

The tone probe allows you to apply a tone signal to a pair of wires or a single conductor, while the trace is done with an amplified probe. When used in conjunction with the amplified probe, the tone generator allows technicians to identify a wire within any beam, at cross connections or at remote ends. You can use twisted pair, coaxial and disconnected AC wiring.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.