CCNA 2 v7

Modules 7 – 9: Available and Reliable Networks Exam Answers

Modules 7 – 9: Available and Reliable Networks Exam Answers Full
1. A network administrator is overseeing the implementation of first hop redundancy protocols. Which two protocols are Cisco proprietary? (Choose two.)

  • HSRP
  • VRRP
  • GLBP
  • IRDP
  • VRRPv2

2. Which statement describes a characteristic of GLBP?

  • It does not provide support for IPv6.​
  • It provides load balancing for a maximum of four gateways.
  • It provides multiple virtual IP addresses and multiple virtual MAC addresses.
  • It provides automatic rerouting if any router in the group fails.

3. Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs?

  • HSRP
  • VRRPv2
  • GLBP
  • SLB

4. A network administrator is analyzing the features that are supported by different first-hop router redundancy protocols. Which statement is a feature that is associated with GLBP?

  • GLBP allows load balancing between routers.
  • It is nonproprietary.
  • It uses a virtual router master.
  • It works together with VRRP.

5. What kind of message is sent by a DHCPv4 client requesting an IP address?

  • DHCPDISCOVER broadcast message
  • DHCPDISCOVER unicast message
  • DHCPOFFER unicast message
  • DHCPACK unicast message

6. As a DHCPv4 client lease is about to expire, what is the message that the client sends the DHCP server?

  • DHCPDISCOVER
  • DHCPOFFER
  • DHCPREQUEST
  • DHCPACK

7. What is the destination IP address when an IPv4 host sends a DHCPDISCOVER message?

  • 255.255.255.255
  • 224.0.0.1
  • 0.0.0.0
  • 192.168.1.1

8. If more than one DHCP server is available on the local network, in which order will DHCP messages be sent between a host and a DHCP server?

  • request, discover, offer, acknowledgment
  • acknowledgment, request, offer, discover
  • discover, offer, request, acknowledgment
  • request, acknowledgment, discover, offer

9. What is the most likely scenario in which the WAN interface of a router would be configured as a DHCP client to be assigned a dynamic IP address from an ISP?

  • There is a web server for public access on the LAN that is attached to the router.
  • The router is also the gateway for a LAN.
  • It is a SOHO or home broadband router.
  • The router is configured as a DHCP server.

10. Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?

  • manual allocation
  • pre-allocation
  • automatic allocation
  • dynamic allocation

11. What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process?

  • to notify other DHCP servers on the subnet that the IP address was leased
  • to notify other hosts not to request the same IP address
  • for hosts on other subnets to receive the information
  • for routers to fill their routing tables with this new information

12. How is a DHCPDISCOVER transmitted on a network to reach a DHCP server?

  • A DHCPDISCOVER message is sent with the IP address of the DHCP server as the destination address.
  • A DHCPDISCOVER message is sent with a multicast IP address that all DHCP servers listen to as the destination address.
  • A DHCPDISCOVER message is sent with the broadcast IP address as the destination address.
  • A DHCPDISCOVER message is sent with the IP address of the default gateway as the destination address.

13. Which destination IPv4 address does a DHCPv4 client use to send the initial DHCP Discover packet when the client is looking for a DHCP server?

  • 127.0.0.1
  • 224.0.0.1
  • 255.255.255.255
  • the IP address of the default gateway

14. Under which two circumstances would a router usually be configured as a DHCPv4 client? (Choose two.)

  • The router is intended to be used as a SOHO gateway.
  • The administrator needs the router to act as a relay agent.
  • The router is meant to provide IP addresses to the hosts.
  • This is an ISP requirement.
  • The router has a fixed IP address.

15. Which address does a DHCPv4 server target when sending a DHCPOFFER message to a client that makes an address request?

  • client IP address
  • client hardware address
  • gateway IP address
  • broadcast MAC address

16. How does an IPv6 client ensure that it has a unique address after it configures its IPv6 address using the SLAAC allocation method?

  • It sends an ARP message with the IPv6 address as the destination IPv6 address.
  • It checks with the IPv6 address database that is hosted by the SLAAC server.
  • It contacts the DHCPv6 server via a special formed ICMPv6 message.
  • It sends an ICMPv6 Neighbor Solicitation message with the IPv6 address as the target IPv6 address.

17. Which method would an IPv6-enabled host using SLAAC employ to learn the address of the default gateway?

  • router advertisements that are received from the link router
  • advertise messages that are received from the DHCPv6 server
  • neighbor advertisements that are eceived from link neighbors
  • reply messages that are received from the DHCPv6 server

18. What two methods can be used to generate an interface ID by an IPv6 host that is using SLAAC? (Choose two.)

  • EUI-64
  • random generation
  • stateful DHCPv6
  • DAD
  • ARP

19. A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?

  • It must send a DHCPv6 INFORMATION-REQUEST message to request the address of the DNS server.
  • It must send an ICMPv6 Router Solicitation message to determine what default gateway it should use.
  • It must send a DHCPv6 REQUEST message to the DHCPv6 server to request permission to use this address.
  • It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.

20. Which command should be configured on a router interface to set the router as a stateful DHCPv6 client?

  • ipv6 enable
  • ipv6 address dhcp
  • ipv6 address autoconfigure
  • ipv6 dhcp server stateful

21. What message informs IPv6 enabled interfaces to use stateful DHCPv6 for obtaining an IPv6 address?

  • the ICMPv6 Router Advertisement
  • the ICMPv6 Router Solicitation
  • the DHCPv6 Reply message
  • the DHCPv6 Advertise message

22. Which destination IP address is used when an IPv6 host sends a DHCPv6 SOLICIT message to locate a DHCPv6 server?

  • FF02::1:2
  • FF02::1
  • FE80::1
  • FF02::2

23. In which alternative to DHCPv6 does a router dynamically provide IPv6 configuration information to hosts?

  • ARP
  • EUI-64
  • ICMPv6
  • SLAAC

24. A company implements the stateless DHCPv6 method for configuring IPv6 addresses on employee workstations. After a workstation receives messages from multiple DHCPv6 servers to indicate their availability for DHCPv6 service, which message does it send to a server for configuration information?

  • DHCPv6 SOLICIT
  • DHCPv6 REQUEST
  • DHCPv6 ADVERTISE
  • DHCPv6 INFORMATION-REQUEST

25. What process is used in ICMPv6 for a host to verify that an IPv6 address is unique before configuring it on an interface?

  • DAD
  • SLAAC
  • EUI-64
  • ARP

26. What are two characteristics of the SLAAC method for IPv6 address configuration? (Choose two.)

  • The default gateway of an IPv6 client on a LAN will be the link-local address of the router interface attached to the LAN.
  • This stateful method of acquiring an IPv6 address requires at least one DHCPv6 server.
  • Clients send router advertisement messages to routers to request IPv6 addressing.
  • IPv6 addressing is dynamically assigned to clients through the use of ICMPv6.
  • Router solicitation messages are sent by the router to offer IPv6 addressing to clients.

27. After booting, a client receives an ICMPv6 RA message with the M flag set to 0 and the O flag set to 1. What does this indicate?

  • The client should request an IPv6 address directly from a DHCPv6 server.
  • The client should automatically configure an IPv6 address without contacting a DHCPv6 server.
  • The client should automatically configure an IPv6 address and then contact a DHCPv6 server for more information.
  • The client should be statically configured with an IPv6 address because the local router does not support autoconfiguration.

28. A network administrator is entering the command ipv6 unicast-routing to start configuring DHCPv6 operation on a router. Which statement describes the function of this command?

  • It is required for sending ICMPv6 RA messages.
  • It is required to configure stateful DHCPv6 server on the router.
  • It is required to configure stateless DHCPv6 server on the router.
  • It is required for enabling DNS service in DHCPv6 configurations.

29. What is the purpose of HSRP?

  • It provides a continuous network connection when a router fails.
  • It prevents a rogue switch from becoming the STP root.
  • It enables an access port to immediately transition to the forwarding state.
  • It prevents malicious hosts from connecting to trunk ports.

30. Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs?

  • HSRP
  • VRRPv2
  • GLBP
  • SLB

31. A network administrator is analyzing first-hop router redundancy protocols. What is a characteristic of VRRPv3?

  • VRRPv3 is Cisco proprietary.
  • It supports IPv6 and IPv4 addressing.
  • It works together with HSRP.
  • It allows load balancing between routers.

32. What is a potential disadvantage when implementing HSRP as compared to GLBP?

  • HSRP does not function in a multivendor environment.
  • HSRP does not provide load balancing with multiple active routers.
  • HSRP does not have the capability to support IPv6 addresses.
  • HSRP provides default gateway failover only when the active router fails.

33. A network engineer is configuring a LAN with a redundant first hop to make better use of the available network resources. Which protocol should the engineer implement?

  • FHRP
  • GLBP
  • HSRP
  • VRRP

34. When first hop redundancy protocols are used, which two items will be shared by a set of routers that are presenting the illusion of being a single router? (Choose two.)

  • hostname
  • IP address
  • BID
  • static route
  • MAC address

35. In FHRP terminology, what represents a set of routers that present the illusion of a single router to hosts?

  • standby router
  • virtual router
  • forwarding router
  • default gateway

36. A network engineer is configuring a LAN with a redundant first hop to make better use of the available network resources. Which protocol should the engineer implement?

  • FHRP
  • GLBP
  • HSRP
  • VRRP

37. What is the purpose of HSRP?

  • It provides a continuous network connection when a router fails.
  • It prevents a rogue switch from becoming the STP root.
  • It enables an access port to immediately transition to the forwarding state.
  • It prevents malicious hosts from connecting to trunk ports.

38. A user needs to add redundancy to the routers in a company. What are the three options the user can use? (Choose three.)

  • HSRP
  • VRRP
  • STP
  • IPFIX
  • RAID
  • GLBP

39. Which two protocols provide gateway redundancy at Layer 3? (Choose two.)

  • VRRP
  • STP
  • PVST
  • RSTP
  • HSRP

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