Computer Networks Lecture 1: Introduction to Computer Networks and Internet
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Questions and Answers

What is the main focus of Chapter 1 in the book 'Computer Networking: A Top Down Approach'?

  • Network Layer
  • Introduction to computer networks and Internet (correct)
  • Transport Layer
  • Application Layer

Which part of the network is responsible for handling loss, delay, and throughput?

  • Network edge
  • Physical media
  • Access networks
  • Network core (correct)

What is the main topic of the lecture agenda based on the provided information?

  • Internet Future
  • Internet History
  • Introduction to the Internet (correct)
  • Access Networks

Which layer in the network architecture is responsible for addressing and routing?

<p>Network Layer (B)</p> Signup and view all the answers

What is a network of networks known as?

<p>Internet (D)</p> Signup and view all the answers

What is the term used for the hosts, access networks, and physical media in the network edge?

<p>End Networks (C)</p> Signup and view all the answers

What are the components of the network core?

<p>Interconnected routers/switches or network of networks (B)</p> Signup and view all the answers

What do end systems do when they have data to send to another end system?

<p>Segment the data and add header bytes to each segment (B)</p> Signup and view all the answers

Which devices are considered non-traditional computing devices connected to the Internet?

<p>Laptops, smartphones, tablets (B)</p> Signup and view all the answers

What does a packet switch do with a packet arriving on one of its incoming communication links?

<p>Forwards the packet on one of its outgoing communication links (C)</p> Signup and view all the answers

What type of communication links are used in the network core?

<p>Wired (fiber and copper) and wireless (radio and satellite) communication links (B)</p> Signup and view all the answers

What is the function of switches in forwarding packets?

<p>Forward packets between the same network (C)</p> Signup and view all the answers

What is the main function of routers in packet forwarding?

<p>Forward packets between different networks (D)</p> Signup and view all the answers

What links can transmit data at different rates?

<p>Different links made up of physical media like copper wire, optical fiber, and radio spectrum and satellite (D)</p> Signup and view all the answers

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

<p>450 Kbps (D)</p> Signup and view all the answers

Which technology is commonly used in wide-area wireless networks to provide between 1 and 10 Mbps transmission rate?

<p>3G (A)</p> Signup and view all the answers

What is the range of network coverage typically supported by wide-area wireless or cellular networks?

<p>1-5 km (B)</p> Signup and view all the answers

What is the book reference for the lecture 'Computer Networks Lecture 2'?

<p>Computer Networking: A Top Down Approach, 6th edition (B)</p> Signup and view all the answers

What is the network coverage typically supported by Wireless LANs using the 802.11 (WiFi) protocol?

<p>100 ft. (B)</p> Signup and view all the answers

What is the primary difference between Wireless LANs and wide-area wireless networks in terms of network coverage?

<p>Wireless LANs have a coverage of 100 ft. while wide-area wireless networks have a coverage of 1-5 km. (B)</p> Signup and view all the answers

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

<p>Guided media signals propagate in solid media, while unguided signals propagate freely in the air (A)</p> Signup and view all the answers

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

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

In which method of data transfer are end-to-end resources allocated and dedicated resources not shared?

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

What is one of the disadvantages of electro-magnetic radio waves as a physical media?

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

What does Fiber optic cable use to transmit data?

<p>Light pulses (A)</p> Signup and view all the answers

Which type of communication link does circuit switching establish?

<p>Dedicated and shared (B)</p> Signup and view all the answers

What is the main characteristic of packet switching?

<p>Data divided into smaller units called packets (C)</p> Signup and view all the answers

What is the function of Frequency Division Multiplexing (FDM)?

<p>Dividing frequency spectrum into multiple channels for transmission (D)</p> Signup and view all the answers

What is one of the main advantages of Time Division Multiplexing (TDM)?

<p>Dynamic resource allocation (B)</p> Signup and view all the answers

What is the main disadvantage of using coaxial cable as a physical media?

<p>Noisy transmission (D)</p> Signup and view all the answers
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