DHCP (Dynamic Host Configuration Protocol) MCQs
What is the primary function of DHCP in computer networks?
a) Encrypting data transmissions
b) Resolving domain names to IP addresses
c) Configuring IP addresses dynamically
d) Filtering network traffic
Answer: c) Configuring IP addresses dynamically
Which DHCP message is used by a client to request an IP address from a DHCP server?
a) DHCPACK
b) DHCPNACK
c) DHCPDISCOVER
d) DHCPREQUEST
Answer: c) DHCPDISCOVER
What is the default UDP port used by DHCP for client-server communication?
a) 53
b) 67
c) 68
d) 80
Answer: c) 68
Which DHCP message confirms that an IP address has been assigned to a client by the DHCP server?
a) DHCPDISCOVER
b) DHCPACK
c) DHCPNAK
d) DHCPREQUEST
Answer: b) DHCPACK
What is the purpose of the DHCPDECLINE message in DHCP communication?
a) To request a new IP address from the DHCP server
b) To acknowledge receipt of an IP address
c) To reject an offered IP address due to conflict or other reasons
d) To release an IP address back to the DHCP server
Answer: c) To reject an offered IP address due to conflict or other reasons
Which DHCP option specifies the default gateway (router) for DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: a) Option 3
What does DHCP relay agent do in DHCP communication?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers across different subnets
d) Resolves DNS queries for DHCP clients
Answer: c) Forwards DHCP messages between clients and servers across different subnets
Which DHCP message is sent by a client to renew an IP address lease from the DHCP server?
a) DHCPACK
b) DHCPNAK
c) DHCPDISCOVER
d) DHCPREQUEST
Answer: d) DHCPREQUEST
What is the purpose of the DHCPINFORM message in DHCP communication?
a) To request an IP address lease
b) To inform DHCP servers of network configuration parameters already obtained
c) To acknowledge receipt of an IP address
d) To release an IP address back to the DHCP server
Answer: b) To inform DHCP servers of network configuration parameters already obtained
Which DHCP option provides the DNS server IP addresses to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: d) Option 15
What is the role of DHCP relay agent in DHCP communication across multiple subnets?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers when they are on different subnets
d) Resolves DNS queries for DHCP clients
Answer: c) Forwards DHCP messages between clients and servers when they are on different subnets
Which DHCP message is used by a client to decline an offered IP address from the DHCP server?
a) DHCPDECLINE
b) DHCPACK
c) DHCPNAK
d) DHCPRELEASE
Answer: a) DHCPDECLINE
What is the purpose of DHCP lease time?
a) To limit the number of DHCP clients on a subnet
b) To specify the maximum number of IP addresses that can be assigned by the DHCP server
c) To determine the duration for which an IP address is assigned to a client
d) To encrypt DHCP messages for security
Answer: c) To determine the duration for which an IP address is assigned to a client
Which DHCP option provides the subnet mask information to DHCP clients?
a) Option 1
b) Option 3
c) Option 6
d) Option 15
Answer: a) Option 1
What is the purpose of the DHCPNAK message in DHCP communication?
a) To acknowledge receipt of an IP address
b) To reject an offered IP address due to conflict or other reasons
c) To release an IP address back to the DHCP server
d) To notify clients of DHCP server availability
Answer: b) To reject an offered IP address due to conflict or other reasons
Which DHCP option provides the domain name (DNS domain suffix) to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What is the purpose of the DHCPREQUEST message in DHCP communication?
a) To request an IP address lease
b) To renew an IP address lease from the DHCP server
c) To inform DHCP servers of network configuration parameters already obtained
d) To release an IP address back to the DHCP server
Answer: b) To renew an IP address lease from the DHCP server
Which DHCP option provides the IP address of the DHCP server itself to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What is the role of DHCP snooping in network security?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers across different subnets
d) Resolves DNS queries for DHCP clients
Answer: b) Filters DHCP traffic based on content
Which DHCP option provides the broadcast address to DHCP clients?
a) Option 1
b) Option 3
c) Option 28
d) Option 255
Answer: c) Option 28
What is the purpose of DHCP reservation in DHCP configuration?
a) To limit the number of DHCP clients on a subnet
b) To reserve specific IP addresses for certain DHCP clients based on MAC address
c) To specify the maximum number of IP addresses that can be assigned by the DHCP server
d) To determine the lease time for IP addresses
Answer: b) To reserve specific IP addresses for certain DHCP clients based on MAC address
Which DHCP option provides the time offset information to DHCP clients?
a) Option 2
b) Option 3
c) Option 6
d) Option 10
Answer: d) Option 10
What is the primary role of DHCP relay agent in DHCP communication?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers when they are on different subnets
d) Resolves DNS queries for DHCP clients
Answer: c) Forwards DHCP messages between clients and servers when they are on different subnets
Which DHCP option provides the domain name (DNS domain suffix) to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What does the ‘DHCPACK’ message indicate in DHCP communication?
a) DHCP client request for an IP address
b) DHCP server acknowledgement of an IP address lease to a client
c) DHCP server rejection of an IP address request from a client
d) DHCP client release of an IP address back to the server
Answer: b) DHCP server acknowledgement of an IP address lease to a client
Which DHCP option provides the subnet mask information to DHCP clients?
a) Option 1
b) Option 3
c) Option 6
d) Option 15
Answer: a) Option 1
What is the role of DHCP snooping in network security?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers across different subnets
d) Resolves DNS queries for DHCP clients
Answer: b) Filters DHCP traffic based on content
Which DHCP option provides the IP address of the DHCP server itself to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What is the purpose of DHCP reservation in DHCP configuration?
a) To limit the number of DHCP clients on a subnet
b) To reserve specific IP addresses for certain DHCP clients based on MAC address
c) To specify the maximum number of IP addresses that can be assigned by the DHCP server
d) To determine the lease time for IP addresses
Answer: b) To reserve specific IP addresses for certain DHCP clients based on MAC address
Which DHCP option provides the time offset information to DHCP clients?
a) Option 2
b) Option 3
c) Option 6
d) Option 10
Answer: d) Option 10
What is the primary role of DHCP relay agent in DHCP communication?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers when they are on different subnets
d) Resolves DNS queries for DHCP clients
Answer: c) Forwards DHCP messages between clients and servers when they are on different subnets
Which DHCP option provides the domain name (DNS domain suffix) to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What does the ‘DHCPACK’ message indicate in DHCP communication?
a) DHCP client request for an IP address
b) DHCP server acknowledgement of an IP address lease to a client
c) DHCP server rejection of an IP address request from a client
d) DHCP client release of an IP address back to the server
Answer: b) DHCP server acknowledgement of an IP address lease to a client
Which DHCP option provides the subnet mask information to DHCP clients?
a) Option 1
b) Option 3
c) Option 6
d) Option 15
Answer: a) Option 1
What is the role of DHCP snooping in network security?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers across different subnets
d) Resolves DNS queries for DHCP clients
Answer: b) Filters DHCP traffic based on content
Which DHCP option provides the IP address of the DHCP server itself to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What is the purpose of DHCP reservation in DHCP configuration?
a) To limit the number of DHCP clients on a subnet
b) To reserve specific IP addresses for certain DHCP clients based on MAC address
c) To specify the maximum number of IP addresses that can be assigned by the DHCP server
d) To determine the lease time for IP addresses
Answer: b) To reserve specific IP addresses for certain DHCP clients based on MAC address
Which DHCP option provides the time offset information to DHCP clients?
a) Option 2
b) Option 3
c) Option 6
d) Option 10
Answer: d) Option 10
What is the primary role of DHCP relay agent in DHCP communication?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers when they are on different subnets
d) Resolves DNS queries for DHCP clients
Answer: c) Forwards DHCP messages between clients and servers when they are on different subnets
Which DHCP option provides the domain name (DNS domain suffix) to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What does the ‘DHCPACK’ message indicate in DHCP communication?
a) DHCP client request for an IP address
b) DHCP server acknowledgement of an IP address lease to a client
c) DHCP server rejection of an IP address request from a client
d) DHCP client release of an IP address back to the server
Answer: b) DHCP server acknowledgement of an IP address lease to a client
Which DHCP option provides the subnet mask information to DHCP clients?
a) Option 1
b) Option 3
c) Option 6
d) Option 15
Answer: a) Option 1
What is the role of DHCP snooping in network security?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers across different subnets
d) Resolves DNS queries for DHCP clients
Answer: b) Filters DHCP traffic based on content
Which DHCP option provides the IP address of the DHCP server itself to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What is the purpose of DHCP reservation in DHCP configuration?
a) To limit the number of DHCP clients on a subnet
b) To reserve specific IP addresses for certain DHCP clients based on MAC address
c) To specify the maximum number of IP addresses that can be assigned by the DHCP server
d) To determine the lease time for IP addresses
Answer: b) To reserve specific IP addresses for certain DHCP clients based on MAC address
Which DHCP option provides the time offset information to DHCP clients?
a) Option 2
b) Option 3
c) Option 6
d) Option 10
Answer: d) Option 10
What is the primary role of DHCP relay agent in DHCP communication?
a) Encrypts DHCP messages for security
b) Filters DHCP traffic based on content
c) Forwards DHCP messages between clients and servers when they are on different subnets
d) Resolves DNS queries for DHCP clients
Answer: c) Forwards DHCP messages between clients and servers when they are on different subnets
Which DHCP option provides the domain name (DNS domain suffix) to DHCP clients?
a) Option 3
b) Option 6
c) Option 12
d) Option 15
Answer: c) Option 12
What does the ‘DHCPACK’ message indicate in DHCP communication?
a) DHCP client request for an IP address
b) DHCP server acknowledgement of an IP address lease to a client
c) DHCP server rejection of an IP address request from a client
d) DHCP client release of an IP address back to the server
Answer: b) DHCP server acknowledgement of an IP address lease to a client
Which DHCP option provides the subnet mask information to DHCP clients?
a) Option 1
b) Option 3
c) Option 6
d) Option 15
Answer: a) Option 1