SRWE MODULES 7–9 | COMPLETE PRACTICE QUESTIONS, ANSWERS & STUDY
GUIDE 2026/2027
What is the function of DHCPv4? - ANS ✔✔Dynamic Host Configuration Protocol v4 (DHCPv4) assigns
IPv4 addresses and other network configuration information dynamically.
Is a dedicated server the only device capable of acting as a DHCPv4 server? - ANS ✔✔No, in a small
branch or SOHO location, a Cisco router can be configured to provide DHCPv4 services without the need
for a dedicated server. Cisco IOS software supports an optional, full-featured DHCPv4 server.
True or False:
When a device receives an address through DHCP it owns that address permanently. - ANS ✔✔False, the
DHCPv4 server dynamically assigns, or leases, an IPv4 address from a pool of addresses for a limited
period of time chosen by the server, or until the client no longer needs the address. This lease can be
renewed.
Place the DHCP messages in the correct order.
Offer
Request
Discover
Acknowledge - ANS ✔✔DORA
Discover
Offer
Request
Acknowledge
Who sends the DHCPDISCOVER message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Client, broadcast
Who sends the DHCPOFFER message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Server, unicast (can be a broadcast under certain conditions
beyond the scope of this course)
Who sends the DHCPREQUEST message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Client, broadcast
, Why is the DHCPREQUEST message sent as a broadcast during the DHCPv4 process? - ANS ✔✔You can
potentially have multiple DHCP servers - the request is sent as broadcast to notify the other DHCP
servers that have potentially sent offers that their offer isn't taken.
Who sends the DHCPACK message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Server, unicast
Which two "DORA" steps must be completed to renew an IP address lease? Unicast or broadcast? - ANS
✔✔DHCPREQUEST & DHCPACK, unicast
What is the result of issuing the "R1(config)# ip dhcp excluded-address 192.168.10.1 192.168.10.9"
command? - ANS ✔✔The addresses between 192.168.10.1 through 192.168.10.9 will not be given out
to hosts on the network. These will be reserved for devices in need of static addresses.
Name some handy DHCP verification commands. - ANS ✔✔show running-config | section DHCP
show ip DHCP binding
show ip DHCP server statistics
What command turns off DHCPv4 service on a cisco router? - ANS ✔✔R1(config)# no service dhcp
Define DHCP relay - ANS ✔✔The DHCP relay agent transfers DHCP messages from DHCP clients located
on a subnet without a DHCP server to other subnets. It also relays answers from DHCP servers to DHCP
clients. The DHCP relay agent is transparent to both the client and the server.
What command will cause a router to relay DHCPv4 broadcasts to the DHCPv4 server on another
subnet? - ANS ✔✔R1(config-if)# ip helper-address 192.168.11.6
DHCPv4 is not the only service that the router can be configured to relay. By default, the ip helper-
address command forwards eight UDP services. Name as many as you can including port numbers. - ANS
✔✔Port 37: Time
Port 49: TACACS
Port 53: DNS
Port 67: DHCP/BOOTP server
Port 68: DHCP/BOOTP client
Port 69: TFTP
Port 137: NetBIOS name service
Port 138: NetBIOS datagram service
To configure an Ethernet interface as a DHCP client, use the ________________ interface configuration
mode command - ANS ✔✔SOHO(config-if)# ip address dhcp
Define "IPv6 GUA" - ANS ✔✔IPv6 Global Unicast Address. They are globally unique and routable on the
IPv6 internet.
GUIDE 2026/2027
What is the function of DHCPv4? - ANS ✔✔Dynamic Host Configuration Protocol v4 (DHCPv4) assigns
IPv4 addresses and other network configuration information dynamically.
Is a dedicated server the only device capable of acting as a DHCPv4 server? - ANS ✔✔No, in a small
branch or SOHO location, a Cisco router can be configured to provide DHCPv4 services without the need
for a dedicated server. Cisco IOS software supports an optional, full-featured DHCPv4 server.
True or False:
When a device receives an address through DHCP it owns that address permanently. - ANS ✔✔False, the
DHCPv4 server dynamically assigns, or leases, an IPv4 address from a pool of addresses for a limited
period of time chosen by the server, or until the client no longer needs the address. This lease can be
renewed.
Place the DHCP messages in the correct order.
Offer
Request
Discover
Acknowledge - ANS ✔✔DORA
Discover
Offer
Request
Acknowledge
Who sends the DHCPDISCOVER message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Client, broadcast
Who sends the DHCPOFFER message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Server, unicast (can be a broadcast under certain conditions
beyond the scope of this course)
Who sends the DHCPREQUEST message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Client, broadcast
, Why is the DHCPREQUEST message sent as a broadcast during the DHCPv4 process? - ANS ✔✔You can
potentially have multiple DHCP servers - the request is sent as broadcast to notify the other DHCP
servers that have potentially sent offers that their offer isn't taken.
Who sends the DHCPACK message?
Client Or Server?
Is it a broadcast or unicast? - ANS ✔✔Server, unicast
Which two "DORA" steps must be completed to renew an IP address lease? Unicast or broadcast? - ANS
✔✔DHCPREQUEST & DHCPACK, unicast
What is the result of issuing the "R1(config)# ip dhcp excluded-address 192.168.10.1 192.168.10.9"
command? - ANS ✔✔The addresses between 192.168.10.1 through 192.168.10.9 will not be given out
to hosts on the network. These will be reserved for devices in need of static addresses.
Name some handy DHCP verification commands. - ANS ✔✔show running-config | section DHCP
show ip DHCP binding
show ip DHCP server statistics
What command turns off DHCPv4 service on a cisco router? - ANS ✔✔R1(config)# no service dhcp
Define DHCP relay - ANS ✔✔The DHCP relay agent transfers DHCP messages from DHCP clients located
on a subnet without a DHCP server to other subnets. It also relays answers from DHCP servers to DHCP
clients. The DHCP relay agent is transparent to both the client and the server.
What command will cause a router to relay DHCPv4 broadcasts to the DHCPv4 server on another
subnet? - ANS ✔✔R1(config-if)# ip helper-address 192.168.11.6
DHCPv4 is not the only service that the router can be configured to relay. By default, the ip helper-
address command forwards eight UDP services. Name as many as you can including port numbers. - ANS
✔✔Port 37: Time
Port 49: TACACS
Port 53: DNS
Port 67: DHCP/BOOTP server
Port 68: DHCP/BOOTP client
Port 69: TFTP
Port 137: NetBIOS name service
Port 138: NetBIOS datagram service
To configure an Ethernet interface as a DHCP client, use the ________________ interface configuration
mode command - ANS ✔✔SOHO(config-if)# ip address dhcp
Define "IPv6 GUA" - ANS ✔✔IPv6 Global Unicast Address. They are globally unique and routable on the
IPv6 internet.
