DHCP interview questions

54 real DHCP questions from the Networking bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.

1. What is DHCP?

Junior
  1. A.a switch security feature that blocks rogue DHCP servers on untrusted ports
  2. B.the protocol that automatically assigns IP addresses and config to hosts
  3. C.forwarding DHCP broadcasts across subnets to a centralized server
  4. D.an unauthorized server that hands out bad configuration, often maliciously
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3. Which statement is correct?

Junior
  1. A.DHCP — the protocol that automatically assigns IP addresses and config to hosts
  2. B.DHCP — a device that requests IP configuration from a DHCP server at boot
  3. C.DHCP — forwarding DHCP broadcasts across subnets to a centralized server
  4. D.DHCP — addresses within a scope reserved so the server will not assign them
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4. What is DHCP lease?

Junior
  1. A.two DHCP servers sharing scope state to provide redundancy
  2. B.the time-limited assignment of an IP address to a client
  3. C.the protocol that automatically assigns IP addresses and config to hosts
  4. D.an unauthorized server that hands out bad configuration, often maliciously
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6. Which statement is correct?

Junior
  1. A.DHCP lease — an unauthorized server that hands out bad configuration, often maliciously
  2. B.DHCP lease — the Discover, Offer, Request, Acknowledge sequence of DHCP address assignment
  3. C.DHCP lease — the host that maintains address pools and assigns configuration to clients
  4. D.DHCP lease — the time-limited assignment of an IP address to a client
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7. What is DHCP scope?

Junior
  1. A.the host that maintains address pools and assigns configuration to clients
  2. B.the range of IP addresses a DHCP server can hand out on a subnet
  3. C.a device that requests IP configuration from a DHCP server at boot
  4. D.the IPv6 variant of DHCP, used in stateful addressing alongside or instead of SLAAC
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9. Which statement is correct?

Junior
  1. A.DHCP scope — the range of IP addresses a DHCP server can hand out on a subnet
  2. B.DHCP scope — a switch security feature that blocks rogue DHCP servers on untrusted ports
  3. C.DHCP scope — the time-limited assignment of an IP address to a client
  4. D.DHCP scope — the option that supplies the default gateway to clients
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10. What is DHCP reservation?

Junior
  1. A.the Discover, Offer, Request, Acknowledge sequence of DHCP address assignment
  2. B.the option that supplies the default gateway to clients
  3. C.the host that maintains address pools and assigns configuration to clients
  4. D.binding a specific IP to a client's MAC address so it always gets the same address
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12. Which statement is correct?

Junior
  1. A.DHCP reservation — the option that supplies DNS server addresses to clients
  2. B.DHCP reservation — binding a specific IP to a client's MAC address so it always gets the same address
  3. C.DHCP reservation — an unauthorized server that hands out bad configuration, often maliciously
  4. D.DHCP reservation — forwarding DHCP broadcasts across subnets to a centralized server
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13. What is DORA process?

Mid
  1. A.binding a specific IP to a client's MAC address so it always gets the same address
  2. B.two DHCP servers sharing scope state to provide redundancy
  3. C.when a client at 87.5% of its lease broadcasts to any server to extend it
  4. D.the Discover, Offer, Request, Acknowledge sequence of DHCP address assignment
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15. Which statement is correct?

Mid
  1. A.DORA process — the Discover, Offer, Request, Acknowledge sequence of DHCP address assignment
  2. B.DORA process — forwarding DHCP broadcasts across subnets to a centralized server
  3. C.DORA process — the protocol that automatically assigns IP addresses and config to hosts
  4. D.DORA process — an unauthorized server that hands out bad configuration, often maliciously
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16. What is DHCP relay / IP helper?

Mid
  1. A.the protocol that automatically assigns IP addresses and config to hosts
  2. B.the option that specifies the IP address lease duration
  3. C.the option that supplies the default gateway to clients
  4. D.forwarding DHCP broadcasts across subnets to a centralized server
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18. Which statement is correct?

Mid
  1. A.DHCP relay / IP helper — forwarding DHCP broadcasts across subnets to a centralized server
  2. B.DHCP relay / IP helper — when a client at 87.5% of its lease broadcasts to any server to extend it
  3. C.DHCP relay / IP helper — an unauthorized server that hands out bad configuration, often maliciously
  4. D.DHCP relay / IP helper — a switch security feature that blocks rogue DHCP servers on untrusted ports
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19. What is DHCP option 3?

Mid
  1. A.the option that specifies the IP address lease duration
  2. B.the host that maintains address pools and assigns configuration to clients
  3. C.the point at half the lease time when a client tries to renew with its current server
  4. D.the option that supplies the default gateway to clients
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21. Which statement is correct?

Mid
  1. A.DHCP option 3 — the point at half the lease time when a client tries to renew with its current server
  2. B.DHCP option 3 — the Discover, Offer, Request, Acknowledge sequence of DHCP address assignment
  3. C.DHCP option 3 — addresses within a scope reserved so the server will not assign them
  4. D.DHCP option 3 — the option that supplies the default gateway to clients
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22. What is DHCP option 6?

Mid
  1. A.the option that supplies DNS server addresses to clients
  2. B.the option that supplies the default gateway to clients
  3. C.forwarding DHCP broadcasts across subnets to a centralized server
  4. D.the range of IP addresses a DHCP server can hand out on a subnet
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24. Which statement is correct?

Mid
  1. A.DHCP option 6 — a device that requests IP configuration from a DHCP server at boot
  2. B.DHCP option 6 — the point at half the lease time when a client tries to renew with its current server
  3. C.DHCP option 6 — the option that supplies DNS server addresses to clients
  4. D.DHCP option 6 — the option that specifies the IP address lease duration
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25. What is DHCP snooping?

Senior
  1. A.addresses within a scope reserved so the server will not assign them
  2. B.binding a specific IP to a client's MAC address so it always gets the same address
  3. C.forwarding DHCP broadcasts across subnets to a centralized server
  4. D.a switch security feature that blocks rogue DHCP servers on untrusted ports
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27. Which statement is correct?

Senior
  1. A.DHCP snooping — a switch security feature that blocks rogue DHCP servers on untrusted ports
  2. B.DHCP snooping — the range of IP addresses a DHCP server can hand out on a subnet
  3. C.DHCP snooping — when a client at 87.5% of its lease broadcasts to any server to extend it
  4. D.DHCP snooping — an unauthorized server that hands out bad configuration, often maliciously
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28. What is DHCP failover?

Senior
  1. A.the IPv6 variant of DHCP, used in stateful addressing alongside or instead of SLAAC
  2. B.the host that maintains address pools and assigns configuration to clients
  3. C.the time-limited assignment of an IP address to a client
  4. D.two DHCP servers sharing scope state to provide redundancy
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30. Which statement is correct?

Senior
  1. A.DHCP failover — the point at half the lease time when a client tries to renew with its current server
  2. B.DHCP failover — the IPv6 variant of DHCP, used in stateful addressing alongside or instead of SLAAC
  3. C.DHCP failover — two DHCP servers sharing scope state to provide redundancy
  4. D.DHCP failover — the host that maintains address pools and assigns configuration to clients
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