Computer Networks Lecture 5: Network Layer
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Questions and Answers

What is the primary function of the IP protocol?

  • Provides error-checking and correction of datagrams
  • Provides connection-oriented, reliable delivery of packets
  • Provides routing and forwarding of packets
  • Provides connectionless, best-effort delivery of datagrams (correct)

    • How do IP addresses differ from physical addresses?

  • IP addresses are logical addresses, while physical addresses are hardware addresses (correct)
  • IP addresses are assigned by the system administrator, while physical addresses are set by the device manufacturer
  • IP addresses are used for routing, while physical addresses are used for switching
  • IP addresses are 32-bit numbers, while physical addresses are 48-bit

    • What is the purpose of DHCP?

  • To dynamically assign IP addresses to devices on a network (correct)
  • To assign IP addresses to devices on a local network only
  • To assign IP addresses to devices on a wide area network only
  • To assign static IP addresses to devices on a network

    • What is the first step in the DHCP process?

    <p>The host broadcasts a 'DHCP discover' message</p> Signup and view all the answers

    What is the primary advantage of using DHCP?

    <p>It allows devices to dynamically obtain their IP addresses</p> Signup and view all the answers

    What is included in the DHCP ACK message sent by the DHCP server?

    <p>Client's IP address, IP address of first-hop router for client, and IP address of DNS server</p> Signup and view all the answers

    What is one of the benefits of IPv6 headers?

    <p>They are simplified and efficient</p> Signup and view all the answers

    What is the main advantage of IPv6 over IPv4?

    <p>IPv6 has a larger address space than IPv4</p> Signup and view all the answers

    What is site multihoming in IPv6?

    <p>A site having connections to multiple ISPs</p> Signup and view all the answers

    What is the size of an IPv6 address?

    <p>128 bits</p> Signup and view all the answers

    What is one of the benefits of IPv6's auto configuration of addresses?

    <p>It allows for simpler address hierarchy levels</p> Signup and view all the answers

    What is the primary benefit of IPsec in IP network security?

    <p>Improved privacy and security</p> Signup and view all the answers

    What is the main difference between IPsec's transport mode and tunnel mode?

    <p>Transport mode only protects the transport layer, while tunnel mode protects the entire packet</p> Signup and view all the answers

    What is the primary function of ICMP in IP networks?

    <p>To report errors and provide feedback on specific conditions</p> Signup and view all the answers

    What is the main advantage of Mobile IPv6?

    <p>It allows an IPv6 node to change its location on an IPv6 network and still maintain its existing connections</p> Signup and view all the answers

    What is carried on IP packets in ICMP?

    <p>Error messages and control messages</p> Signup and view all the answers

    What is the collection of protocols designed by the IETF to provide security for a packet at the network level?

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

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