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</p> Signup and view all the answers

    What is a network of networks known as?

    <p>Internet</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</p> Signup and view all the answers

    What are the components of the network core?

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

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

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

    What is the function of switches in forwarding packets?

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

    What is the main function of routers in packet forwarding?

    <p>Forward packets between different networks</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</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</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</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</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</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.</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.</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</p> Signup and view all the answers

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

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

    What does Fiber optic cable use to transmit data?

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

    Which type of communication link does circuit switching establish?

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

    What is the main characteristic of packet switching?

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

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

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

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

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

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