Computer Networks and Cybersecurity
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Questions and Answers

What is the primary function of the Physical layer in the OSI model?

  • Translation of domain names to IP addresses
  • Routing of packets between networks
  • Error checking and correction of data
  • Physical transmission of data between devices (correct)

    • Which OSI layer is responsible for providing application support?

  • Session layer
  • Network layer
  • Application layer (correct)
  • Transport layer

    • What is the main purpose of the OSI model?

  • To improve network security
  • To standardize network communication protocols (correct)
  • To increase network bandwidth
  • To reduce network latency

    • Which OSI layer is responsible for routing packets between networks?

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

    What is the primary function of the Data Link layer in the OSI model?

    <p>Error checking and correction of data</p> Signup and view all the answers

    How many layers are there in the OSI model?

    <p>7</p> Signup and view all the answers

    Which device operates at the physical layer of the OSI model?

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

    What is the primary role of a wireless access controller (WAC) in a large-scale Wi-Fi network?

    <p>Centralize management, configuration, and security of multiple access points (APs) within a network</p> Signup and view all the answers

    What is the purpose of network segmentation using VLANs and access control lists (ACLs) in security best practices?

    <p>Enhance network security</p> Signup and view all the answers

    What is the main difference between TCP port numbers and UDP port numbers in network protocols?

    <p>TCP ports are associated with specific applications or services for reliable communication, UDP ports are used for simpler data exchange without guaranteed delivery</p> Signup and view all the answers

    What is the primary function of a router in a network?

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

    What is the main function of a switch in a network?

    <p>Forward packets at the data link layer of the OSI model</p> Signup and view all the answers

    Which layer of the OSI model is responsible for error detection and correction?

    <p>Data link layer</p> Signup and view all the answers

    What is the main advantage of utilizing a content delivery network (CDN) for web performance optimization?

    <p>Distributing static content from geographically dispersed servers</p> Signup and view all the answers

    What is the purpose of network forensics in cybersecurity incident response?

    <p>Collect and analyze digital evidence from network devices and logs</p> Signup and view all the answers

    When using EtherChannel, how are individual links aggregated to appear as a single logical link?

    <p>By bundling multiple links together</p> Signup and view all the answers

    What is the main difference between IPv4 and IPv6 header fields in addressing schemes?

    <p>IPv4 header uses 32-bit addressing, IPv6 header uses 128-bit addressing</p> Signup and view all the answers

    Which protocol is commonly used for carrying voice traffic over IP networks?

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

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