Itn 208 Chapter 7 Review Questions

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Network Quizzes & Trivia

Questions and Answers
  • 1. 

    When a node receives a RA, what flag is required to be set to "on" in order for the node to perform SLAAC?

    • A.

      A Flag

    • B.

      M flag

    • C.

      R flag

    • D.

      S flag

    Correct Answer
    A. A Flag
    Explanation
    The A Flag, also known as the Autonomous Flag, needs to be set to "on" in order for the node to perform Stateless Address Autoconfiguration (SLAAC). SLAAC is a method used by IPv6 hosts to automatically configure their own unique IPv6 addresses without the need for manual configuration or DHCP servers. The A Flag indicates whether the host is allowed to use SLAAC to generate its own addresses. If the A Flag is set to "off", the host will not perform SLAAC and will instead rely on other methods to obtain its IPv6 address.

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  • 2. 

    DHCP manages only IP addresses

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    DHCP (Dynamic Host Configuration Protocol) does not only manage IP addresses, but also other network configuration settings such as subnet mask, default gateway, and DNS server addresses. It is responsible for automatically assigning and managing these settings to devices on a network, making it easier to configure and manage large networks. Therefore, the statement that DHCP only manages IP addresses is false.

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  • 3. 

    Which of the following terms describes a single group of IP addresses managed by DHCP?

    • A.

      Address pool

    • B.

      Address group

    • C.

      Address scope

    • D.

      Address superscope

    Correct Answer(s)
    A. Address pool
    C. Address scope
    Explanation
    An address pool is a range of IP addresses that are managed by a DHCP server and can be assigned to devices on a network. An address scope is another term used to describe a single group of IP addresses managed by DHCP. Both terms refer to the same concept of a range of IP addresses that can be dynamically assigned to devices on a network. Address group and Address superscope are not accurate terms to describe a single group of IP addresses managed by DHCP.

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  • 4. 

     An IPv6 address on a host moves from the preferred state to the deprecated state when which of the following events occurs?

    • A.

      The preferred lifetime timer expires and the valid lifetime timer is valid

    • B.

      The preferred lifetime timer is valid and the valid lifetime timer is expired

    • C.

      The preferred lifetime timer expires and the valid lifetime timer is expired

    • D.

      The preferred lifetime timer is valid and the valid lifetime timer is valid

    Correct Answer
    A. The preferred lifetime timer expires and the valid lifetime timer is valid
    Explanation
    When the preferred lifetime timer expires, it means that the host can no longer use the IPv6 address for new connections. However, if the valid lifetime timer is still valid, it means that the host can continue to use the IPv6 address for existing connections. Therefore, when the preferred lifetime timer expires and the valid lifetime timer is valid, the IPv6 address moves from the preferred state to the deprecated state.

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  • 5. 

    Which of the following represent a valid DHCP software component

    • A.

      DHCP client

    • B.

      DHCP resolver

    • C.

      DHCP server

    • D.

      DHCP primary master

    • E.

      DHCP secondary master

    • F.

      DHCP relay

    Correct Answer(s)
    A. DHCP client
    C. DHCP server
    F. DHCP relay
    Explanation
    A DHCP client is a software component that is responsible for requesting and obtaining IP addresses and other network configuration information from a DHCP server. A DHCP server is a software component that assigns IP addresses and other network configuration information to DHCP clients. A DHCP relay is a software component that forwards DHCP messages between DHCP clients and DHCP servers in different network segments. Therefore, DHCP client, DHCP server, and DHCP relay are all valid DHCP software components.

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  • 6. 

    Which of the following represents a valid enhancement found in DHCPv6 or a related enhancement that is part of the basic IPv6 environment?

    • A.

      IPv6 interfaces support multiple addresses in DHCPv6

    • B.

      IPv6 nodes must listen for address updates to support automatic renumbering

    • C.

      Nodes under IPv6 can obtain locally functioning addresses in DHCPv6

    • D.

      DHCPv6 servers and routers can be configured to send advertisements in authenticated form

    • E.

      DHCPv 6 can be set up to dynamically update DNS records

    Correct Answer(s)
    A. IPv6 interfaces support multiple addresses in DHCPv6
    B. IPv6 nodes must listen for address updates to support automatic renumbering
    D. DHCPv6 servers and routers can be configured to send advertisements in authenticated form
    E. DHCPv 6 can be set up to dynamically update DNS records
    Explanation
    The correct answer includes multiple valid enhancements found in DHCPv6 and related enhancements in the basic IPv6 environment. IPv6 interfaces supporting multiple addresses in DHCPv6 allows for flexibility in assigning and managing addresses. IPv6 nodes listening for address updates supports automatic renumbering, which is important for network maintenance and scalability. DHCPv6 servers and routers being configured to send advertisements in authenticated form enhances security. DHCPv6 can be set up to dynamically update DNS records, which simplifies the management of DNS in IPv6 networks.

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  • 7. 

    When a DHCP server is not available on the same network segment as DHCP client, which techniques permit the DHCP client 's  initial DHCP broadcast requests to be serviced

    • A.

      A. None do. A DHCP server must be available on any network segment or broadcast domain where a DHCP client resides.

    • B.

      B. Installing a DHCP relay agent on any network segment or broadcast domain where a DNS server is not directly attached

    • C.

      c. Installing a remote DHCP agent on any network segment or broadcast domain where a DNS server is not directly attached.

    • D.

      D. Configuring internal routers to forward DHCP requests from network segments or broadcast domains where DHCP clients reside to segments where DHCP servers reside.

    • E.

      E. Configuring internal routers to forward DHCP requests from network segments or broadcast domains where DHCP servers reside to segments where DHCP clients reside.

    Correct Answer
    D. D. Configuring internal routers to forward DHCP requests from network segments or broadcast domains where DHCP clients reside to segments where DHCP servers reside.
    Explanation
    When a DHCP server is not available on the same network segment as the DHCP client, the DHCP client's initial DHCP broadcast requests can be serviced by configuring internal routers to forward DHCP requests from network segments or broadcast domains where DHCP clients reside to segments where DHCP servers reside. This technique allows the DHCP client to reach the DHCP server even if they are not on the same network segment, ensuring that the client can obtain an IP address and other configuration information from the server.

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  • 8. 

    How does a DHCP relay forward the DHCP server’s reply to a client’s initial address request? 

    • A.

      It uses a temporary IP address created for the requester

    • B.

      IT uses the IP address offered to the requester

    • C.

      IT uses the MAC layer address for the requester

    • D.

      It broadcasts a reply, for which the requester listens

    Correct Answer
    C. IT uses the MAC layer address for the requester
    Explanation
    A DHCP relay forwards the DHCP server's reply to a client's initial address request by using the MAC layer address for the requester. This means that the relay uses the client's unique MAC address to ensure that the reply is delivered to the correct device. By using the MAC layer address, the relay can accurately route the server's response to the specific client that made the initial request.

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  • 9. 

    The Neighbor Discovery protocol in IPv6 supports stateless autoconfiguration of attached nodes. 

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The Neighbor Discovery protocol in IPv6 supports stateless autoconfiguration of attached nodes. This means that nodes can automatically configure their IPv6 addresses and other network parameters without the need for a central server or manual configuration. This protocol allows nodes to discover and communicate with their neighbors on the network, making it easier for devices to connect and communicate in an IPv6 network.

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  • 10. 

    When a node creates a link-local address, which of the following methods for creating an IID can be appended to the well-known link-local prefix fe80::/64? 

    • A.

      64-bit randomly generated address

    • B.

      The 64-bit MAC address

    • C.

      The 64-bit modified EUI-64 address

    • D.

      a 64-bit CGS

    Correct Answer(s)
    A. 64-bit randomly generated address
    C. The 64-bit modified EUI-64 address
    Explanation
    The well-known link-local prefix fe80::/64 is used for creating link-local addresses. The 64-bit randomly generated address and the 64-bit modified EUI-64 address are both valid methods for creating the Interface Identifier (IID) portion of the link-local address. The 64-bit randomly generated address is generated using a random number generator, while the 64-bit modified EUI-64 address is derived from the MAC address of the network interface card. Both methods provide a unique identifier for the node on the link-local network.

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  • 11. 

    Which issue explains why DHCP was not traditionally used to manage server and router addresses?

    • A.

      Routers and servers require static IP address assignments

    • B.

      DCHP is a client only solution

    • C.

      DHCP may only be updated manually, so it's not suitable for servers or routers

    • D.

      Servers and routers often depend on DNS which must be manually updated when addresses change

    Correct Answer
    D. Servers and routers often depend on DNS which must be manually updated when addresses change
    Explanation
    Servers and routers often depend on DNS which must be manually updated when addresses change. This means that if DHCP was used to manage server and router addresses, any changes in IP addresses would require manual updates in the DNS system. This would be time-consuming and prone to errors. Therefore, DHCP was not traditionally used for managing server and router addresses to avoid the need for manual updates in the DNS system.

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  • 12. 

    Which of the following types of machines is best suited for dynamic IP address assignment? (Hint: Some kinds of machines require persistent IP addresses to remain easy to find on the Internet; others do not.) 

    • A.

      Servers

    • B.

      Routers

    • C.

      Clients

    • D.

      None of the above

    Correct Answer
    C. Clients
    Explanation
    Clients are the best suited for dynamic IP address assignment. This is because clients are typically devices that connect to a network, such as computers, smartphones, or tablets. Dynamic IP address assignment allows the network to assign a temporary IP address to each client device when it connects to the network. This allows for efficient use of IP addresses and makes it easier to manage a large number of devices on the network. Servers and routers, on the other hand, often require persistent IP addresses to remain easily accessible on the internet.

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  • 13. 

    Which activities occur during the process of IPv6 autoconfiguration? (Choose all that apply.) 

    • A.

      The node checks its calculated link-local address with a Neighbor Solicitation to make sure that address is not already in use.

    • B.

      The node makes an RS to obtain RAs from attached routers.

    • C.

      The node attempts to calculate a link-local address by prepending its EUI-64 IID with the well-known link-local prefix.

    • D.

      Once a DHCPv6 server is identified, it always provides all necessary information to complete the autoconfiguration process.

    • E.

      All of the above

    Correct Answer(s)
    A. The node checks its calculated link-local address with a Neighbor Solicitation to make sure that address is not already in use.
    B. The node makes an RS to obtain RAs from attached routers.
    Explanation
    During the process of IPv6 autoconfiguration, the node checks its calculated link-local address with a Neighbor Solicitation to ensure that the address is not already in use. The node also makes a Router Solicitation (RS) to obtain Router Advertisements (RAs) from attached routers. These RAs contain important information such as the network prefix, default gateway, and DNS server addresses, which are necessary for the autoconfiguration process. Therefore, both of these activities occur during IPv6 autoconfiguration.

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  • 14. 

    Which of the following UDP ports numbers are associated with DHCP?

    • A.

      57 and 58

    • B.

      67 and 68

    • C.

      77 and 78

    • D.

      116 and 117

    Correct Answer
    B. 67 and 68
    Explanation
    UDP (User Datagram Protocol) is a connectionless protocol that operates at the transport layer of the Internet protocol suite. DHCP (Dynamic Host Configuration Protocol) is a network management protocol used to dynamically assign IP addresses and other network configuration parameters to devices on a network. DHCP uses UDP ports 67 and 68 for communication between the DHCP server and client. Therefore, the correct answer is 67 and 68.

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  • 15. 

    Which of the following best explain why a DHCP Discover packet is broadcast to the local network segment? ( choose all that apply)

    • A.

      Because the address of a DHCP server is not known

    • B.

      Because the client has no IP address and can not send a unicast

    • C.

      Because the client's network address is unknown

    • D.

      Because the clients host address is unknown

    Correct Answer
    A. Because the address of a DHCP server is not known
    Explanation
    A DHCP Discover packet is broadcast to the local network segment because the address of a DHCP server is not known. This broadcast allows the client to discover and communicate with a DHCP server, which will assign it an IP address. By broadcasting the packet, the client ensures that it reaches all devices on the network segment, including any potential DHCP servers.

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  • 16. 

    What type of packet does a DHCP server send to a DHCP client in reply to a discover packet?

    • A.

      Reply packet

    • B.

      Offer packet

    • C.

      Release packet

    • D.

      Renewal packet

    Correct Answer
    B. Offer packet
    Explanation
    When a DHCP client sends a discover packet to the DHCP server, it is essentially requesting an IP address. In response to this discover packet, the DHCP server sends an offer packet to the client. The offer packet contains the IP address that the server is willing to assign to the client, along with other configuration information such as subnet mask, default gateway, and DNS servers. The client can then choose to accept or decline the offered IP address.

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  • 17. 

    Which flag is required to be set to "on" in an RA for a host to send a request to a DHCPv6 server

    • A.

      A flag

    • B.

      L flag

    • C.

      N flag

    • D.

      M flag

    Correct Answer
    D. M flag
    Explanation
    The M flag, which stands for Managed address configuration, needs to be set to "on" in an RA (Router Advertisement) for a host to send a request to a DHCPv6 server. This flag indicates that the host should use DHCPv6 to obtain its IPv6 address configuration from a DHCPv6 server.

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  • 18. 

    How does a DCHP client accept an offer from a DHCP server?

    • A.

      By issuing DHCP Accept packet

    • B.

      By issuing DHCP Request packet

    • C.

      By issuing DHCP Declinet packet

    • D.

      By issuing DHCP Renewal packet

    Correct Answer
    B. By issuing DHCP Request packet
    Explanation
    The DHCP client accepts an offer from a DHCP server by issuing a DHCP Request packet. This packet is sent by the client to the server to officially request the offered IP address and other configuration parameters. The client includes the server's offer information in the request packet, indicating its acceptance of the offer. This allows the server to reserve and assign the IP address to the client, completing the DHCP lease process.

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  • 19. 

    When a node sends an RS, what type of message is it?

    • A.

      An anycast message

    • B.

      A broadcast message

    • C.

      A unicast message

    • D.

      A multicast message

    Correct Answer
    A. An anycast message
    Explanation
    When a node sends an RS (Router Solicitation), it is sending an anycast message. An anycast message is a type of message that is sent to a group of nodes, but only one node in the group will receive and process the message. In the case of an RS, the message is sent to a group of routers, and only one router in the group will respond with an RA (Router Advertisement). This allows the node to discover the presence and configuration of routers on the network.

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  • 20. 

    On a Windows 10 host, if the host does not receive an RA in response to its RS, what is its next step in the IPv6 address autoconfiguration process? 

    • A.

      Stop the IPv6 auto configuration process

    • B.

      Continue sending RS messages until it receives an RA

    • C.

      Send a DHCPv6 solicit message

    • D.

      Autoconfigure a global unicast address using the link-local prefix

    Correct Answer
    C. Send a DHCPv6 solicit message
    Explanation
    If a Windows 10 host does not receive a Router Advertisement (RA) in response to its Router Solicitation (RS), its next step in the IPv6 address autoconfiguration process is to send a DHCPv6 solicit message. This message is used to request configuration parameters, including an IPv6 address, from a DHCPv6 server. By sending this message, the host is attempting to obtain the necessary information to configure its IPv6 address.

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  • 21. 

    What kind of DHCP packet does the server send to the client to denote completeion of the DHCP Discovery process?

    • A.

      DHCP Accept packet

    • B.

      DHCP Request packet

    • C.

      DHCP Acknowledgement (ACK) packet

    • D.

      DHCP Renewal packet

    Correct Answer
    C. DHCP Acknowledgement (ACK) packet
    Explanation
    The DHCP server sends a DHCP Acknowledgement (ACK) packet to the client to denote the completion of the DHCP Discovery process. This packet is sent in response to the DHCP Request packet sent by the client after receiving the DHCP Offer packet from the server. The ACK packet confirms that the client's request for an IP address has been accepted and the lease has been granted.

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  • 22. 

    Which of the following UDP port numbers are associated with DHCPv6?

    • A.

      117 and 118

    • B.

      67 and 68

    • C.

      546 and 547

    • D.

      47 and 48

    Correct Answer
    C. 546 and 547
    Explanation
    The correct answer is 546 and 547. DHCPv6 (Dynamic Host Configuration Protocol version 6) is a network protocol used to configure IPv6 addresses and other network parameters. It operates over UDP (User Datagram Protocol) using port numbers 546 and 547. Port 546 is used by DHCPv6 clients to send requests, while port 547 is used by DHCPv6 servers to receive and respond to those requests.

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  • 23. 

    A Windows Server 2012 R2 DHCPv6 server can supply which of the following to a node in response to a DHCPv6 request? (Choose all that apply.)

    • A.

      An IPv6 address

    • B.

      An IPv6 default gateway address

    • C.

      A DNS servier IPv6 address

    • D.

      The domain name

    Correct Answer(s)
    A. An IPv6 address
    C. A DNS servier IPv6 address
    D. The domain name
    Explanation
    A Windows Server 2012 R2 DHCPv6 server can supply an IPv6 address, a DNS server IPv6 address, and the domain name to a node in response to a DHCPv6 request.

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  • 24. 

    In a DHCPv6 server, IPv6 addresses are bound to which of the following

    • A.

      MAC address of the host

    • B.

      Link-local address of the host

    • C.

      DUID of the host

    • D.

      IPv4 addressor the host

    Correct Answer
    C. DUID of the host
    Explanation
    In a DHCPv6 server, IPv6 addresses are bound to the DUID (DHCP Unique Identifier) of the host. The DUID is a unique identifier assigned to each DHCPv6 client and is used to identify and distinguish clients on the network. By binding the IPv6 address to the DUID, the DHCPv6 server ensures that the client receives the same IPv6 address every time it connects to the network, allowing for consistent communication and network configuration.

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  • 25. 

    What is the process whereby a DNS server higher in the domain name hierarchy confers responsibility for portions of the global DNS database on DNS servers lower in its hierarchy?

    • A.

      Subordination of authority

    • B.

      Database consolidation

    • C.

      Delegation authority

    • D.

      Database segmentaion

    Correct Answer
    C. Delegation authority
    Explanation
    Delegation authority is the process where a DNS server higher in the domain name hierarchy transfers responsibility for portions of the global DNS database to DNS servers lower in its hierarchy. This allows for the distribution of workload and management of specific portions of the database by different servers, ensuring efficient and reliable functioning of the DNS system.

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  • 26. 

    IPv6 uses what means to provide source and destination address selection? 

    • A.

      A single source and destination address selection algorithm is used.

    • B.

      A source address selection algorithm and a DA selection algorithm are used.

    • C.

      For source address selection, a set of 8 algorithms is used; for DA selection, a set of 10 algorithms is used.

    • D.

      IPv6 uses the same process for source and destination address selection that IPv4 uses.

    Correct Answer
    B. A source address selection algorithm and a DA selection algorithm are used.
    Explanation
    IPv6 uses a source address selection algorithm and a destination address selection algorithm to provide source and destination address selection.

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  • 27. 

    Which DNS resource record is used for IPv6 host addresses? 

    • A.

      A

    • B.

      AAAA

    • C.

      PTR

    • D.

      MX

    Correct Answer
    B. AAAA
    Explanation
    The DNS resource record used for IPv6 host addresses is AAAA. This record is used to map a domain name to its corresponding IPv6 address. It allows the DNS resolver to find the correct IPv6 address associated with a hostname, enabling communication with IPv6-enabled hosts on the internet.

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