CCNA 3, Modules 7-9

Refer to the exhibit. What should be done to allow PC-A to receive an IPv6 address from the DHCPv6 server?

Add the ipv6 dhcp relay command to interface Fa0/0

Which protocol automates assignment of IP addresses on a network, and which port number does it use?

DHCP 67

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?

DHCPACK

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

DHCPDISCOVER

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?

DHCPDISCOVER DHCPREQUEST

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

DHCPREQUEST

What is an advantage of configuring a Cisco router as a relay agent?

It can provide relay services for multiple UDP services

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 and contact a DHCPv6 server for additional information

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

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

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

The computer receives an IP address that starts with 169.254.

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

Which statement is true about DHCP operation?​

When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network

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

a DHCPREQUEST unicast message​

Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

broadcast DHCPREQUEST

What is the administrator trying to achieve?

configuring the router to obtain IP parameters from a DHCPv4 server

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

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 link-local address of the router interface that is attached to the network

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

- DHCPDISCOVER - DHCPOFFER - DHCPREQUEST - DHCPACK

1. The _____________________ message is used to identify any DHCP servers on a network. 2. The _____________________ message is used by a server to offer a lease to a client. 3. The _____________________ message is used to identify both the specific DHCP server and the lease that the client is accepting. 4. The _____________________ message is used by a server to finalize a successful lease with a client. 5. The _____________________ message is used when an offered lease is no longer valid DHCPACK DHCPDISCOVER DHCPREQUEST DHCPNAK DHCPOFFER

1. DHCPDISCOVER 2. DHCPOFFER 3. DHCPREQUEST 4. DHCPACK 5. DHCPNAK

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?

255.255.255.255 When a host boots and has been configured for dynamic IP addressing, the device tries to obtain a valid IP address. It sends a DHCPDISCOVER message. This is a broadcast message because the DHCP server address is unknown (by design). The destination IP address in the IP header is 255.255.255.255 and the destination MAC address is FF:FF:FF:FF:FF:FF.

A company uses DHCP to manage IP address deployment for employee workstations. The IT department deploys multiple DHCP servers in the data center and uses DHCP relay agents to facilitate the DHCP requests from workstations. Which two UDP ports are used to forward DHCP traffic?

67 68

A client device on an Ethernet segment needs an IP address in order to communicate on the network. A DHCP server with IP address 192.168.1.1 has been configured and enabled on the network. How will a client device obtain a usable IP address for this network?

Send a DHCPDISCOVER message to physical address FF-FF-FF-FF-FF-FF

A small coffee shop is offering free Wi-Fi to customers. The network includes a wireless router and a DSL modem that is connected to the local phone company. What method is typically used to configure the connection to the phone company?

Set the WAN connection in the wireless router as a DHCP client