Computer Networks Lecture 2: Internet Structure and Data Transmission Methods
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Questions and Answers

What is the average transmission rate offered by the 802.11 (WiFi) protocol in Wireless LANs?

  • 100 Mbps
  • 50 Mbps
  • 1 Gbps
  • 450 Mbps (correct)

Which wireless technology is provided by telecommunications companies and offers network coverage within 1-5 km with a speed of 1-10 Mbps?

  • 5G
  • 3G
  • GSM (correct)
  • 4G

What type of network coverage is supported by Wireless LANs?

  • 1-5 km
  • Within building (100 ft.) (correct)
  • No specific coverage
  • Global

In a wireless network, what does GSM stand for?

<p>Global System for Mobile communication (A)</p> Signup and view all the answers

Which physical media is considered when a bit travels through a series of links and routers?

<p>A combination of different media including wireless, fiber-optic, and copper cables (C)</p> Signup and view all the answers

What is the average speed offered by wide-area wireless networks using 3G technology?

<p>10 Mbps (C)</p> Signup and view all the answers

What is the main difference between guided and unguided physical media?

<p>Guided physical media signals propagate in solid media, while unguided signals propagate freely through electromagnetic radio waves (D)</p> Signup and view all the answers

What type of information is carried by the light pulses in fiber optic cables?

<p>Bits characterized by high-speed operation (C)</p> Signup and view all the answers

What is the transmission rate of Category 6 twisted pair copper?

<p>10 Gbps (C)</p> Signup and view all the answers

Which method of data transfer establishes a dedicated communication path between two devices before data transmission?

<p>Circuit switching (B)</p> Signup and view all the answers

What is a characteristic of circuit switching?

<p>The circuit remains dedicated for the duration of the session (A)</p> Signup and view all the answers

What is the main disadvantage of electro-magnetic radio waves as a physical media?

<p>Obstruction by objects (C)</p> Signup and view all the answers

What does packet switching involve?

<p>Communication method where data is divided into smaller units called packets (A)</p> Signup and view all the answers

What is the main difference between Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM)?

<p>$TDM$ involves dividing the channel into time slots, while $FDM$ involves dividing the channel into frequency slots (A)</p> Signup and view all the answers

$10Gbps$ data transmission is typically associated with which type of twisted pair copper?

<p>$Category 6$ (C)</p> Signup and view all the answers

$Packet switching$ differs from $circuit switching$ in that:

<p>$Packet switching$ establishes a dedicated communication path before data transmission, while $circuit switching$ divides data into smaller units called packets (C)</p> Signup and view all the answers

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