Computer Networks and Communication Systems
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Questions and Answers

What defines a LAN in terms of geographical area?

  • A network of computers
  • A small geographical area (correct)
  • A wide geographical area
  • A global network

    • What is the primary function of a WAN?

  • To administer network services
  • To provide high-speed bandwidth to internal devices
  • To connect devices within a limited area
  • To interconnect LANs over wide geographical areas (correct)

    • What is a characteristic of a peer-to-peer network?

  • Limited access to network resources
  • All computers have the same abilities to use network resources (correct)
  • Dedicated servers providing services
  • Client devices are dependent on servers

    • What is an example of a Client/Server network?

    <p>Mail Server</p> Signup and view all the answers

    What determines how nodes in a network are connected and communicate?

    <p>Network Topology</p> Signup and view all the answers

    What is the primary function of the Internet?

    <p>To provide a global collection of interconnected LANs and WANs</p> Signup and view all the answers

    What is the primary function of a Network Interface Card (NIC)?

    <p>To directly access the network</p> Signup and view all the answers

    What is the main advantage of sharing expensive devices and network resources?

    <p>Reduced costs</p> Signup and view all the answers

    What is a characteristic of the Internet?

    <p>It is a global collection of interconnected LANs and WANs</p> Signup and view all the answers

    What type of transmission media uses electromagnetic waves?

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

    What type of network uses copper wires, fiber optic cables, and wireless transmissions?

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

    What is the role of an end device in a network?

    <p>To originate or receive messages</p> Signup and view all the answers

    What is the purpose of a shared channel in a network?

    <p>To provide a medium for data transmission</p> Signup and view all the answers

    What is an example of modern technology used in computer networks?

    <p>IP telephony</p> Signup and view all the answers

    What type of network component is responsible for connecting multiple networks together?

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

    What is the benefit of shared internet access in a network?

    <p>Easy access to information</p> Signup and view all the answers

    What is a major disadvantage of the bus topology?

    <p>A faulty cable can bring the entire network down.</p> Signup and view all the answers

    What is an advantage of the star topology?

    <p>It is easy to troubleshoot.</p> Signup and view all the answers

    What is a characteristic of the ring topology?

    <p>Data is passed one way from device to device.</p> Signup and view all the answers

    What is a disadvantage of the star topology?

    <p>If the central device fails, the whole network fails.</p> Signup and view all the answers

    What is an advantage of the bus topology?

    <p>It is less expensive to set up.</p> Signup and view all the answers

    Which topology is commonly used today?

    <p>Star topology</p> Signup and view all the answers

    What happens if a single computer fails in a star topology?

    <p>The network is not affected.</p> Signup and view all the answers

    What type of topology connects devices via a centralized unit?

    <p>Star topology</p> Signup and view all the answers

    What is the main disadvantage of a single point of failure in a network?

    <p>It causes the whole network to go down if one device or cable fails.</p> Signup and view all the answers

    What type of topology has the highest fault tolerance?

    <p>Mesh Topology</p> Signup and view all the answers

    What is the main advantage of circuit-switched communication?

    <p>It ensures dedicated communication channels.</p> Signup and view all the answers

    What happens to packets in packet-switching?

    <p>They are split into smaller packets and buffered before transmission.</p> Signup and view all the answers

    What is a characteristic of circuit-switched communication?

    <p>It is mostly used for voice traffic.</p> Signup and view all the answers

    What is a disadvantage of mesh topology?

    <p>It requires a large number of cables.</p> Signup and view all the answers

    What happens during the data transfer phase of circuit-switched communication?

    <p>Data is transmitted through a dedicated channel.</p> Signup and view all the answers

    What is a limitation of circuit-switched communication?

    <p>Channel capacity is wasted if no data is being transmitted.</p> Signup and view all the answers

    What is the maximum length of a twisted pair cable segment?

    <p>100 meters</p> Signup and view all the answers

    What is the main difference between STP and UTP cables?

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

    What type of connector is commonly used with twisted pair cables?

    <p>RJ-45</p> Signup and view all the answers

    How does increasing the twist rate of a UTP cable affect its performance?

    <p>It decreases the interference</p> Signup and view all the answers

    What is the main advantage of UTP cables?

    <p>All of the above</p> Signup and view all the answers

    What is the bandwidth of a category 5 UTP cable?

    <p>100 Mbps</p> Signup and view all the answers

    What type of cable is used for long-distance connections?

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

    What is the main disadvantage of fiber-optic cables?

    <p>High cost</p> Signup and view all the answers

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