CIS 102 Chapter 10
Refer to the exhibit. A network administrator is implementing the stateless DHCPv6 operation for the company. Clients are configuring IPv6 addresses as expected. However, the clients are not getting the DNS server address and the domain name information configured in the DHCP pool. What could be the cause of the problem?
*The router is configured for SLAAC operation. * The clients cannot communicate with the DHCPv6 server, evidenced by the number of active clients being 0. The GigabitEthernet interface is not activated. The DNS server address is not on the same network as the clients are on.
A network administrator is implementing DHCPv6 for the company. The administrator configures a router to send RA messages with M flag as 1 by using the interface command ipv6 nd managed-config-flag. What effect will this configuration have on the operation of the clients?
Clients must use the information that is contained in RA messages. Clients must use the prefix and prefix length that are provided by a DHCPv6 server and generate a random interface ID. Clients must use the prefix and prefix length that are provided by RA messages and obtain additional information from a DHCPv6 server. *Clients must use all configuration information that is provided by a DHCPv6 server *
Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host?
DHCPv6 ARPv6 UDP *ICMPv6 *
A company uses DHCP servers to dynamically assign IPv4 addresses to employee workstations. The address lease duration is set as 5 days. An employee returns to the office after an absence of one week. When the employee boots the workstation, it sends a message to obtain an IP address. Which Layer 2 and Layer 3 destination addresses will the message contain?
FF-FF-FF-FF-FF-FF and IPv4 address of the DHCP server both MAC and IPv4 addresses of the DHCP server MAC address of the DHCP server and 255.255.255.255 *FF-FF-FF-FF-FF-FF and 255.255.255.255*
A host on the 10.10.100.0/24 LAN is not being assigned an IPv4 address by an enterprise DHCP server with the address 10.10.200.10/24. What is the best way for the network engineer to resolve this problem?
Issue the command default-router 10.10.200.10 at the DHCP configuration prompt on the 10.10.100.0/24 LAN gateway router. *Issue the command ip helper-address 10.10.200.10 on the router interface that is the 10.10.100.0/24 gateway. * Issue the command ip helper-address 10.10.100.0 on the router interface that is the 10.10.200.0/24 gateway. Issue the command network 10.10.200.0 255.255.255.0 at the DHCP configuration prompt on the 10.10.100.0/24 LAN gateway router.
A company uses the method SLAAC to configure IPv6 addresses for the workstations of the employees. A network administrator configured the IPv6 address on the LAN interface of the router. The interface status is UP. However, the workstations on the LAN segment did not obtain the correct prefix and prefix length. What else should be configured on the router that is attached to the LAN segment for the workstations to obtain the information?
R1(config-if)# ipv6 enable R1(config-if)# ipv6 nd other-config-flag *R1(config)# ipv6 unicast-routing * R1(config)# ipv6 dhcp pool <name of the pool>
Refer to the exhibit. Based on the output that is shown, what kind of IPv6 addressing is being configured?
SLAAC static link-local *stateless DHCPv6 * stateful DHCPv6
Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?
broadcast DHCPACK unicast DHCPREQUEST unicast DHCPACK *broadcast DHCPREQUEST *
An administrator issues the commands: Router(config)# interface g0/1 Router(config-if)# ip address dhcp What is the administrator trying to achieve?
configuring the router to resolve IP address conflicts configuring the router to act as a DHCPv4 server configuring the router to act as a relay agent *configuring the router to obtain IP parameters from a DHCPv4 server *
Which is a DHCPv4 address allocation method that assigns IPv4 addresses for a limited lease period?
pre-allocation manual allocation *Dynamic allocation * automatic allocation
A company uses the SLAAC method to configure IPv6 addresses for the employee workstations. Which address will a client use as its default gateway?
the unique local address of the router interface that is attached to the network the global unicast address of the router interface that is attached to the network *the link-local address of the router interface that is attached to the network * the all-routers multicast address
What is the reason why the DHCPREQUEST message is sent as a broadcast during the DHCPv4 process?
to notify other hosts not to request the same IP address for routers to fill their routing tables with this new information for hosts on other subnets to receive the information *to notify other DHCP servers on the subnet that the IP address was leased *
Refer to the exhibit. A network administrator is implementing stateful DHCPv6 operation for the company. However, the clients are not using the prefix and prefix-length information that is configured in the DHCP pool. The administrator issues a show ipv6 interface command. What could be the cause of the problem?
*The router is configured for stateless DHCPv6 operation. * The router is configured for SLAAC DHCPv6 operation. The Duplicate Address Detection feature is disabled. No virtual link-local address is configured
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. * *This is an ISP requirement. * The router is meant to provide IP addresses to the hosts. The administrator needs the router to act as a relay agent. The router has a fixed IP address.
Type a command to exclude the first fifteen useable IP addresses from a DHCPv4 address pool of the network 10.0.15.0/24. Router(config)# ip dhcp
*excluded-address 10.0.15.1 *10.0.15.15
Which set of commands will configure a router as a DHCP server that will assign IPv4 addresses to the 192.168.100.0/23 LAN while reserving the first 10 and the last addresses for static assignment?
*ip dhcp excluded-address* *192.168.100.1 192.168.100.10* *ip dhcp excluded-address **192.168.101.254* *ip dhcp pool LAN-POOL-100* *network 192.168.100.0* *255.255.254.0* *default-router 192.168.100.1 * ip dhcp excluded-address 192.168.100.1 192.168.100.10 ip dhcp excluded-address 192.168.100.254 ip dhcp pool LAN-POOL-100 network 192.168.100.0 255.255.255.0 ip default-gateway 192.168.100.1 ip dhcp excluded-address 192.168.100.1 192.168.100.9 ip dhcp excluded-address 192.168.101.254 ip dhcp pool LAN-POOL-100 ip network 192.168.100.0 255.255.254.0 ip default-gateway 192.168.100.1 dhcp pool LAN-POOL-100 ip dhcp excluded-address 192.168.100.1 192.168.100.9 ip dhcp excluded-address 192.168.100.254 network 192.168.100.0 255.255.254.0 default-router 192.168.101.1
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. How many IP addresses has the DHCP server leased and what is the number of DHCP pools configured? (Choose two.)
*one pool * seven leases *three leases * six pools two pools five leases
Refer to the exhibit. What should be done to allow PC-A to receive an IPv6 address from the DHCPv6 server?
Add the IPv6 address 2001:DB8:1234:5678::10/64 to the interface configuration of the DHCPv6 server. *Add the ipv6 dhcp relay command to interface Fa0/0.* Configure the ipv6 nd managed-config-flag command on interface Fa0/1. Change the ipv6 nd managed-config-flag command to ipv6 nd other-config-flag.
Order the steps of configuring a router as a DHCPv4 server. (Not all options are used.)
Configure a DHCP pool *step 2* Exclude IP addresses. *step 1* Configure the routing protocol. *not used* Define the default gateway router. *step 3* Configure a secret password. *not used*
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 REQUEST DHCPv6 SOLICIT DHCPv6 ADVERTISE *DHCPv6 INFORMATION-REQUEST *
A network administrator configures a router to send RA messages with M flag as 0 and O flag as 1. Which statement describes the effect of this configuration when a PC tries to configure its IPv6 address?
It should use the information that is contained in the RA message exclusively. It should contact a DHCPv6 server for all the information that it needs. *It should use the information that is contained in the RA message and contact a DHCPv6 server for additional information.* It should contact a DHCPv6 server for the prefix, the prefix-length information, and an interface ID that is both random and unique.
Match the descriptions to the corresponding DHCPv6 server type. (Not all options are used).
enabled in RA messages with the ipv6 nd other-config-flag command = *stateless DHCPv6* Clients communicate with the DHCPv6 server by the use of RA messages = *not used* the M flag is set to 1 in RA messages =*stateful DHCPv6* uses the address command to create a pool of addresses for clients = *stateful DHCP v6* clients send only DHCPv6 INFORMATION-REQUEST messages to the server =*stateless DHCPv6* enabled on the client with the ipv6 address dhcp command = *stateful DHCPv6* enabled on the client with the ipv6 address autoconfig command = *stateful DHCP v6*
An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured?
stateful DHCPv6 RA and EUI-64 *stateless DHCPv6 * SLAAC