Cisco II | Ch. 8, DHCP
True. - correct answer ✔✔True or False? A Cisco router can be configured to provide DHCPv4 services
without the need for a dedicated server.
24 hours
week - correct answer ✔✔Administrators configure DHCPv4 servers to set the leases to time out at
different intervals. The lease is typically anywhere from ______ to a _____ or more
2/3 - correct answer ✔✔DHCPDISCOVER uses Layer _ and Layer _ broadcast addresses to communicate
with the server.
binding DHCPOFFER - correct answer ✔✔A DHCPv4 server sends the __________________ message to
the requesting client.
ARP - correct answer ✔✔When the DHCPv4 server receives a DHCPDISCOVER message, it creates an ___
entry consisting of the MAC address of the requesting client and the leased IPv4 address of the client.
DHCPREQUEST - correct answer ✔✔Which type of message is used for both lease origination and lease
renewal?
ICMP ping - correct answer ✔✔Upon receipt of a DHCPREQUEST message, the server verifies the lease
information with an ____________ to that address to ensure it is not in use already.
False. It is, except for a change in the message type field. - correct answer ✔✔True or False? The
DHCPACK message is a duplicate of the DHCPOFFER.
68/67
67/68 - correct answer ✔✔DHCPv4 messages are sent from the client use source port __and destination
port __. While messages sent from the server to the client use source port __and destination port __.
,Operation (OP) Code - correct answer ✔✔Specifies the general type of message. A value of 1 indicates a
request message; a value of 2 is a reply message.
Hardware Type - correct answer ✔✔Identifies the hardware used in the network.
Hops - correct answer ✔✔Controls the forwarding of messages. Set to 0 by a client before transmitting a
request.
Transaction Identifier - correct answer ✔✔Used by the client to match the request with replies received
from DHCPv4 servers.
Flags - correct answer ✔✔Used by a client that does not know its IPv4 address when it sends a request.
False. It should be sent as a broadcast - correct answer ✔✔True or False? A value of 1 in the flag field
tells the DHCPv4 server or relay agent receiving the request that the reply should be sent as a unicast.
CIADDR
YIADDR
SIADDR
GIADDR = all are 4 bytes
CHADDR = 16 bytes
SNAME = 64 bytes
Boot Filename = 128 Bytes
DHCP Options = Variable - correct answer ✔✔Match the Transaction Identifier to its size. Answers may
be used multiple times.
Server Name (SNAME)
Gateway IP address (GIADDR)
Client Hardware Address (CHADDR)
Your IP Address (YIADDR)
, Boot Filename
Server IP address (SIADDR)
DHCP Options
Client IP Address (CIADDR)
4 bytes
16 bytes
64 bytes
128 bytes
Variable
0.0.0.0 - correct answer ✔✔Unknown information is sent as _________.
CIADDR
CHADDR (Client Hardware Address) - correct answer ✔✔The DHCP server responds to the
DHCPDISCOVER by assigning values to the _______ and subnet mask. The frame is constructed using the
_________ and sent to the requesting client.
ip dhcp pool Test-Pool - correct answer ✔✔Enter the command(s) to create a pool with the name Test-
Pool and put the router into DHCPv4 configuration mode.
network - correct answer ✔✔The address pool and default gateway router must be configured. Use the
__________ statement to define the range of available addresses.
default-router - correct answer ✔✔Use the ______________ command to define the default gateway
router. Typically, the gateway is the LAN interface of the router closest to the client devices.
ip dhcp excluded-address 192.168.100.1 192.168.100.30 - correct answer ✔✔While configuring DHCPv4,
you discover that you need to exclude all valid host IP addresses on 192.168.100.0/27. Enter the
command(s) necessary to accomplish this.
True. - correct answer ✔✔True or False? A Cisco router can be configured to provide DHCPv4 services
without the need for a dedicated server.
24 hours
week - correct answer ✔✔Administrators configure DHCPv4 servers to set the leases to time out at
different intervals. The lease is typically anywhere from ______ to a _____ or more
2/3 - correct answer ✔✔DHCPDISCOVER uses Layer _ and Layer _ broadcast addresses to communicate
with the server.
binding DHCPOFFER - correct answer ✔✔A DHCPv4 server sends the __________________ message to
the requesting client.
ARP - correct answer ✔✔When the DHCPv4 server receives a DHCPDISCOVER message, it creates an ___
entry consisting of the MAC address of the requesting client and the leased IPv4 address of the client.
DHCPREQUEST - correct answer ✔✔Which type of message is used for both lease origination and lease
renewal?
ICMP ping - correct answer ✔✔Upon receipt of a DHCPREQUEST message, the server verifies the lease
information with an ____________ to that address to ensure it is not in use already.
False. It is, except for a change in the message type field. - correct answer ✔✔True or False? The
DHCPACK message is a duplicate of the DHCPOFFER.
68/67
67/68 - correct answer ✔✔DHCPv4 messages are sent from the client use source port __and destination
port __. While messages sent from the server to the client use source port __and destination port __.
,Operation (OP) Code - correct answer ✔✔Specifies the general type of message. A value of 1 indicates a
request message; a value of 2 is a reply message.
Hardware Type - correct answer ✔✔Identifies the hardware used in the network.
Hops - correct answer ✔✔Controls the forwarding of messages. Set to 0 by a client before transmitting a
request.
Transaction Identifier - correct answer ✔✔Used by the client to match the request with replies received
from DHCPv4 servers.
Flags - correct answer ✔✔Used by a client that does not know its IPv4 address when it sends a request.
False. It should be sent as a broadcast - correct answer ✔✔True or False? A value of 1 in the flag field
tells the DHCPv4 server or relay agent receiving the request that the reply should be sent as a unicast.
CIADDR
YIADDR
SIADDR
GIADDR = all are 4 bytes
CHADDR = 16 bytes
SNAME = 64 bytes
Boot Filename = 128 Bytes
DHCP Options = Variable - correct answer ✔✔Match the Transaction Identifier to its size. Answers may
be used multiple times.
Server Name (SNAME)
Gateway IP address (GIADDR)
Client Hardware Address (CHADDR)
Your IP Address (YIADDR)
, Boot Filename
Server IP address (SIADDR)
DHCP Options
Client IP Address (CIADDR)
4 bytes
16 bytes
64 bytes
128 bytes
Variable
0.0.0.0 - correct answer ✔✔Unknown information is sent as _________.
CIADDR
CHADDR (Client Hardware Address) - correct answer ✔✔The DHCP server responds to the
DHCPDISCOVER by assigning values to the _______ and subnet mask. The frame is constructed using the
_________ and sent to the requesting client.
ip dhcp pool Test-Pool - correct answer ✔✔Enter the command(s) to create a pool with the name Test-
Pool and put the router into DHCPv4 configuration mode.
network - correct answer ✔✔The address pool and default gateway router must be configured. Use the
__________ statement to define the range of available addresses.
default-router - correct answer ✔✔Use the ______________ command to define the default gateway
router. Typically, the gateway is the LAN interface of the router closest to the client devices.
ip dhcp excluded-address 192.168.100.1 192.168.100.30 - correct answer ✔✔While configuring DHCPv4,
you discover that you need to exclude all valid host IP addresses on 192.168.100.0/27. Enter the
command(s) necessary to accomplish this.
