Computer Networks - IPv4 and IPv6 Addressing
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Questions and Answers

What is the purpose of the Flow Label in an IPv6 packet header?

  • To indicate that all packets with the same label receive the same type of handling. (correct)
  • To specify the source address of the packet.
  • To indicate the length of the data payload in the packet.
  • To ensure packets are handled differently by routers based on the type.

    • What does the Payload Length field in the IPv6 header represent?

  • The length of the header in bits.
  • The total length of the packet including the header.
  • The length of the data portion of the packet only. (correct)
  • The maximum size of an IPv6 packet.

    • How does the Hop Limit function in an IPv6 packet header?

  • It replaces the IPv4 Protocol field.
  • It sets a limit on the bandwidth used by the packet.
  • It indicates the number of routers a packet can traverse before being discarded. (correct)
  • It determines the type of payload in the packet.

    • What is indicated by the Next Header field in an IPv6 packet header?

    <p>The type of data payload that is being carried.</p> Signup and view all the answers

    Which field in the IPv6 header identifies the sending host's address?

    <p>Source IPv6 Address</p> Signup and view all the answers

    What is the primary purpose of a subnet mask in an IPv4 network?

    <p>To identify the network and host portions of an address</p> Signup and view all the answers

    Which of the following addresses represents a broadcast address in an IPv4 network?

    <p>192.168.10.255</p> Signup and view all the answers

    What must be true for devices on the same network with IPv4 addressing?

    <p>They must have identical network portions.</p> Signup and view all the answers

    What is the significance of the address 192.168.10.0 in an IPv4 network?

    <p>It is the network address.</p> Signup and view all the answers

    Which of the following correctly defines an IPv4 address structure?

    <p>An address consisting of 32 bits divided into 4 octets.</p> Signup and view all the answers

    What type of IPv4 address is required for devices that need a fixed IP, such as printers and servers?

    <p>Static IP address</p> Signup and view all the answers

    When an IPv4 address is compared to a subnet mask, what does a '1' in the subnet mask indicate?

    <p>This bit belongs to the network portion.</p> Signup and view all the answers

    What is the primary advantage of IPv6 over IPv4 regarding address space?

    <p>Based on 128-bit addressing</p> Signup and view all the answers

    Which field in the IPv6 header identifies the protocol version?

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

    In IPv4 addressing, what distinguishes a unique IPv4 address of a host?

    <p>Not conflicting with other addresses on the same network</p> Signup and view all the answers

    What does the Time-to-Live (TTL) field determine in an IPv4 packet?

    <p>The lifespan of the packet while traversing routers</p> Signup and view all the answers

    What feature does IPv6 eliminate that is common in IPv4?

    <p>Network Address Translation (NAT)</p> Signup and view all the answers

    How is the IPv6 header structured compared to the IPv4 header?

    <p>Fewer fields and simpler format</p> Signup and view all the answers

    In IPv6, how is each 16-bit segment represented?

    <p>By four hexadecimal digits</p> Signup and view all the answers

    What is the function of the Differentiated Services (DS) field in IPv4?

    <p>To determine the packet's priority level</p> Signup and view all the answers

    What is a key characteristic of a hextet in an IPv6 address?

    <p>It refers to a segment of 16 bits</p> Signup and view all the answers

    What protocol is primarily used to dynamically assign IPv4 addresses to hosts?

    <p>Dynamic Host Configuration Protocol (DHCP)</p> Signup and view all the answers

    What happens to an IPv4 address when a host is powered down or removed from the network?

    <p>It is returned to the pool for reuse.</p> Signup and view all the answers

    Which of the following best describes unicast communication?

    <p>One to one communication.</p> Signup and view all the answers

    In broadcast transmission, what does the destination IPv4 address consist of?

    <p>All ones in the host portion.</p> Signup and view all the answers

    What is the valid address range for Class C private IPv4 addresses?

    <p>192.168.0.0 to 192.168.255.255</p> Signup and view all the answers

    What is true about private IPv4 addresses?

    <p>They are not routable and used only in internal networks.</p> Signup and view all the answers

    Which address range is designated for multicast transmission?

    <p>224.0.0.0 to 239.255.255.255</p> Signup and view all the answers

    What does the Dynamic Host Configuration Protocol (DHCP) lease to hosts?

    <p>IPv4 addresses and other configuration information.</p> Signup and view all the answers

    What is the primary use of the loopback address 127.0.0.1?

    <p>To test TCP/IP configuration on the local host</p> Signup and view all the answers

    Which address range is designated for link-local addresses?

    <p>169.254.0.0/16</p> Signup and view all the answers

    What type of addresses does the range 192.0.2.0/24 include?

    <p>TEST-NET addresses for documentation</p> Signup and view all the answers

    How many addresses are available in the loopback address block (127.0.0.0/8)?

    <p>16777216</p> Signup and view all the answers

    What is the purpose of the address block 169.254.0.0/16?

    <p>Used for link-local communication between hosts</p> Signup and view all the answers

    The primary role of an IPv4 packet header is to:

    <p>Identify various settings of the IP packet for Layer 3 processing</p> Signup and view all the answers

    Which of the following best describes the range of addresses in the block 169.254.0.0/16?

    <p>A private address range used for automatic configuration</p> Signup and view all the answers

    Which of the following statements about the TEST-NET address block is true?

    <p>It cannot be used in real network environments</p> Signup and view all the answers

    Study Notes

    Computer Networks - IPv4 and IPv6 Addressing

    • The lecture covers IPv4 and IPv6 network addressing.
    • IPv4 addresses are 32 bits long, divided into 4 octets (8 bits each).
    • IPv4 addresses are commonly expressed in dotted decimal notation (e.g., 192.168.10.10).
    • Binary numbering uses 0s and 1s.
    • IPv4 addresses consist of a network portion and a host portion.
    • Devices on the same network must have the same network portion.
    • The subnet mask helps identify the network and host portions of an address.
    • Three IPv4 addresses are needed for a host: a unique IPv4 address, a subnet mask, and a default gateway.
    • A default gateway is the IP address of the local router interface.
    • IPv4 addresses are assigned dynamically (via DHCP) or statically.
    • DHCP servers provide configuration information (address, subnet mask, gateway, etc.) to hosts.
    • IPv4 communication types include unicast (one-to-one), broadcast (one-to-all), and multicast (one-to-a-select group).
    • Private IPv4 addresses are not routable on the public internet.
    • Private IPv4 addresses are for internal use within a network.
    • Common private IPv4 address ranges include: Class A (10.0.0.0 to 10.255.255.255), Class B (172.16.0.0 to 172.31.255.255), and Class C (192.168.0.0 to 192.168.255.255).
    • Special user IPv4 addresses include: loopback (127.0.0.1), link-local (169.254.0.0/16), and TEST-NET (192.0.2.0/24).
    • IPv4 packet headers have fields like version, header length, type of service, total length, protocol, source IP address, destination IP address, time-to-live, and checksum.
    • IPv6 addresses are 128 bits long.
    • IPv6 hexadecimal representation uses every 4 bits as a single hexadecimal digit.
    • IPv6 addresses use colons to separate groups of hexadecimal digits.
    • IPv6 uses a simplified header compared to IPv4.
    • IPv6 advantages include larger address space, more efficient packet handling, hierarchical network architecture, autoconfiguration, and elimination of NAT.

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    Computer Networks - IPv4 and IPv6 (LEC #8)

    Description

    This quiz focuses on the key concepts of IPv4 and IPv6 addressing in computer networks. Participants will explore the structure of IPv4 addresses, including their binary representation and the importance of subnet masks and default gateways. Test your understanding of dynamic and static IP assignments, as well as various communication types.

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