Computer Networks Lecture 1: Introduction and Application Layer
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Computer Networks Lecture 1: Introduction and Application Layer

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Questions and Answers

What is the primary focus of the book 'Computer Networking: A Top Down Approach' by Jim Kurose and Keith Ross?

  • Transport layer protocols
  • Internet structure and performance (correct)
  • Data link layer protocols
  • Application layer protocols

    • Which chapter of the book 'Computer Networking: A Top Down Approach' is likely to cover the topic of network core?

  • Chapter 1
  • Chapter 4 (correct)
  • Chapter 3
  • Chapter 2

    • What are the main components included in the network edge according to the lecture agenda?

  • Packet/circuit switching, Internet structure
  • Service models and layers
  • Hosts, access networks, physical media (correct)
  • Loss, delay, throughput

    • Which of the following is NOT included in the lecture agenda for Introduction to the Internet?

    <p>Protocol definition</p> Signup and view all the answers

    What is the Internet primarily described as, based on the provided text?

    <p>A network of networks</p> Signup and view all the answers

    Which layer of the OSI model is likely to be covered in Chapter 5 of the book 'Computer Networking: A Top Down Approach'?

    <p>Link Layer</p> Signup and view all the answers

    What is the function of packet switches?

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

    Which devices are considered as traditional computing devices?

    <p>Linux workstations</p> Signup and view all the answers

    What is the main function of network edges?

    <p>Host computing devices</p> Signup and view all the answers

    What is the role of the Internet in connecting computing devices?

    <p>Interconnects billions of computing devices throughout the world</p> Signup and view all the answers

    What types of physical media are used for communication links?

    <p>Optical fiber and radio spectrum</p> Signup and view all the answers

    What do non-traditional computing devices include?

    <p>Watches and eye glasses</p> Signup and view all the answers

    How are data transmission rates measured?

    <p>In bits/second</p> Signup and view all the answers

    What is the function of a router in packet switching?

    <p>Forward packets between different 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

    What is the main function of network core?

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

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

    <p>450 Mbps</p> Signup and view all the answers

    Which technology is used to offer between 1 and 10 Mbps in Wide-area Wireless or cellular networks?

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

    What is the primary network coverage for Wide-area Wireless or cellular networks?

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

    Which protocol is used for network coverage within a building in Wireless LANs?

    <p>802.11 (WiFi)</p> Signup and view all the answers

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

    <p>Addison-Wesley, 2012</p> Signup and view all the answers

    What are the two categories into which wireless networks could be categorized?

    <p>Wireless Local Area Networks and Wireless Wide Area Networks</p> Signup and view all the answers

    What type of communication media transmits data in electron format and includes two types, Category 5 and Category 6?

    <p>Twisted pair copper</p> Signup and view all the answers

    Which communication method involves establishing a dedicated communication path between two devices before data transmission begins?

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

    What type of communication media carries signals in the electromagnetic spectrum without wires and is commonly used in wireless LAN and wide-area networks?

    <p>Electro-magnetic radio waves</p> Signup and view all the answers

    Which guided physical media transmits data in electron format using glass fiber carrying light pulses?

    <p>Fiber optic cable</p> Signup and view all the answers

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

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

    Which method of data transmission involves dividing data into smaller units called packets?

    <p>Packet switching</p> Signup and view all the answers

    What is the characteristic of circuit switching where the circuit remains dedicated to the communication for the duration of the session?

    <p>End-to-end resources allocated</p> Signup and view all the answers

    What distinguishes Category 5 twisted pair copper from Category 6 twisted pair copper?

    <p>$100$ Mbps transmission rate vs $1$ Gbps transmission rate</p> Signup and view all the answers

    Which type of communication media transmits data in electron format using two concentric copper conductors?

    <p>Coaxial cable</p> Signup and view all the answers

    What is the distinguishing feature of fiber optic cable in terms of data transmission?

    <p>Low error rate</p> Signup and view all the answers

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