CCNA module 7 - 9

1. A DHCP-enabled client PC has just booted. During which two steps will the client PC use broadcast messages when communicating with a DHCP server? (Choose two.)

• 
  

• • DHCPDISCOVER

  
  

• • DHCPACK

  
  

• • DHCPOFFER

• • DHCPREQUEST

  
  

• • DHCPNAK

  
  

2. 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 act as a DHCPv4 server

  
  

• • configuring the router to obtain IP parameters from a DHCPv4 server

  
  

• • configuring the router to act as a relay agent

  
  

• • configuring the router to resolve IP address conflicts

  
  

3. When a client is requesting an initial address lease from a DHCP server, why is the DHCPREQUEST message sent as a broadcast?

• 
  

• • The client does not yet know the IP address of the DHCP server that sent the offer.

  
  

• • The DHCP server may be on a different subnet, so the request must be sent as a broadcast.

  
  

• • The client does not have a MAC address assigned yet, so it cannot send a unicast message at Layer 2.

  
  

• • The client may have received offers from multiple servers, and the broadcast serves to implicitly decline those other offers.

  
  

4. Which DHCP IPv4 message contains the following information?

Destination address: 255.255.255.255
Client IPv4 address: 0.0.0.0
Default gateway address: 0.0.0.0
Subnet mask: 0.0.0.0

• • DHCPACK

  
  

• • DHCPDISCOVER

  
  

• • DHCPOFFER

• • DHCPREQUEST

  
  

5. Place the options in the following order:

• 
  1: a client initiating a message to find a DHCP server

• 2: a DHCP server responding to the initial request by a client

• 3: the client accepting the IP address provided by the DHCP server

• 4: the DHCP server confirming that the lease has been accepted

A: DHCPDISCOVER

B: DHCPOFFER
C: DHCPREQUEST

D: DHCPACK

• 1 - A

  2 - B

  3 - C

  4 - D

• 1 - B

  2 - D

  3 - C

  4 - A

• 1 - C

  2 - D

  3 - B

  4 - A

• 1 - A

  2 - D

  3 - C

  4 - B

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

• 
  

• • DHCP

  
  

• • DNS

• • 67

• • 80

• • 53

  
  

7. Refer to the exhibit. PC1 is configured to obtain a dynamic IP address from the DHCP server. PC1 has been shut down for two weeks. When PC1 boots and tries to request an available IP address, which destination IP address will PC1 place in the IP header?

• • 192.168.1.1

  
  

• • 192.168.1.255

  
  

• • 255.255.255.255

  
  

• • 192.168.1.8

  
  

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

• 
  

• • DHCPOFFER

  
  

• • DHCPDISCOVER

• • DHCPREQUEST

  
  

• • DHCPACK

  
  

9. 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?

• 
  

• • service dhcp

  
  

• • ip address dhcp

  
  

• • ip helper-address

  
  

• • ip dhcp pool

  
  

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

• 
  

• DHCPDISCOVER

• • a DHCPREQUEST broadcast message​

  
  

• • a DHCPREQUEST unicast message​

  
  

• • a DHCPDISCOVER broadcast message