CNET246 v7 Module 7-9 Exam Practice

Which protocol automates assignment of IP addresses on a network, and which port number does it use? (Choose two.)

• DHCP

• DNS

• SMB

• 53

• 67

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?

• both MAC and IPv4 addresses of the DHCP server

• FF-FF-FF-FF-FF-FF and 255.255.255.255

• MAC address of the DHCP server and 255.255.255.255

• FF-FF-FF-FF-FF-FF and IPv4 address of the DHCP server

Which command will allow a network administrator to check the IP address that is assigned to a particular MAC address?

• Router# show ip dhcp pool

• Router# show running-config I section_dhcp

• Router# show ip dhcp binding

• Router# show ip dhcp server statistics

Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server?

• DHCPACK

• DHCPDISCOVER

• DHCPOFFER

• DHCPREQUEST

Which command, when issued in the interface configuration mode of a router, enables the interface to acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?

• ip address dhcp

• service dhcp

• service dhcp

• ip dhcp pool

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 192.168.100.254

  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

  192.168.100.10

  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

• 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

• 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

Which kind of message is sent by a DHCP client when its IP address lease has expired?​

• a DHCPDISCOVER broadcast message

• a DHCPREQUEST broadcast message​

• a DHCPREQUEST unicast message

• a DHCPDISCOVER unicast message​

A host PC is attempting to lease an address through DHCP. What message is sent by the server to let the client know it is able to use the provided IP information?

• DHCPDISCOVER

• DHCPOFFER

• DHCPREQUEST

• DHCPACK

What is a result when the DHCP servers are not operational in a network?

• Workstations are assigned with the IP address 0.0.0.0.

• Workstations are assigned with the IP address

  127.0.0.1.

• Workstations are assigned with IP addresses in the

  10.0.0.0/8 network.

• Workstations are assigned with IP addresses in the

  169.254.0.0/16 network.

What is one indication that a Windows computer did not receive an IPv4 address from a DHCP server?

• The computer cannot ping 127.0.0.1.

• Windows displays a DHCP timeout message

• The computer receives an IP address that starts with

  169.254.

• The computer cannot ping other devices on the same

  network with IP addresses in the 169.254.0.0/16 range.