O.TEC ESO4 UT5 Devices & network

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1 What form do the electromagnetic waves emitted by a router have?

1 The waves are emitted in concentric waves, it is like throwing a stone into a lake.

2 The waves form a spiral that expands and increases their radius.

3 The waves form like a "Donut" that expands up more horizontally than vertically.

4 The waves are emitted by expanding from top to bottom, and from left to right

2 Which of these could be your computer's IP address ?

1) www.google.es

2) 00-13-00-E1-11-11

3) 192.168.014

4) 192.168.014.033

3 When a transmitter sends a message using an electric cable as a channel, the received signal is ...?

1 ...a dust of light

2 ...an electrical impulse

3 ...electromagnetic waves

4 All answers are correct

Clear selection

4 If we talk about electromagnetic waves that carry energy and information, what will be the correct answer?

1 The frequency of a small wave carries more energy, information, and its range is smaller

2 The frequency of a small wave carries more energy, information, and its range is wider

3 The frequency of a large wave carries more energy, information, and its range is wider

4 The frequency of a large wave carries more energy, information, and its range is smaller

Clear selection

5 In electromagnetic waves...

1 ...the magnetic and electric part moves from top to bottom and from left to right

2 ...the magnetic part moves from top to bottom and the electric part from left to right

3 ...the electric part moves from top to bottom and the magnetic part from left to right

4 All answers are correct

Clear selection

6 The difference between WiFi and Bluetooth is ..

1 Bluetooth signal range is 10 meters while Wi-Fi reaches 100 meters.

2 WiFi is for browsing, Bluetooth for headphones or speakers.

3 WiFi transmits data with encryption and Bluetooth with double encryption

4 WiFi and Bluetooth do the same thing.

Clear selection

7 The accespoint...

1 is a device that interconnects a local network, transmits the information to all

2 is a device that sends data between a local network and an external one through Internet

3 is a device that sends the information directly to the destination device.

4 is a device that can establish wireless connections and network between devices

Clear selection

8 If we are talking about fiber optics, what is the correct answer?

1 The optical fiber includes, sends and transforms the electrical signal into an optical signal

2 The optical fiber includes a photodiode that detects the optical signal

3 The electrical signal is formed by electrons and the optical signal by photons

4 All are correct

Clear selection

9 The electromagnetic wave frequency is...

1 The quantity of electromagnetic waves in unit time at a given point

2 The quantity of electromagnetic waves that circulate in the wave length

3 The quantity of electromagnetic waves that circulate in one herz

4 All answers are correct

Clear selection

10 The name of the communication system that takes advantage of the electrical installation to send information is...

1 PLT

2 MDS

3 ELM

4 WINS

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