What is the four-step process for obtaining a DHCP lease for an IP address?

What is the four-step process for obtaining a DHCP lease for an IP address?

• A. DORA
• B. DHCP4
• C. ARP
• D. DNS

Answer: (A)

The process is a four-step exchange known by the acronym DORA: Discover, Offer, Request, Acknowledge. The client first broadcasts a DHCPDISCOVER to find any DHCP server on the network. A server responds with a DHCPOFFER that includes an available IP address and lease terms. The client then sends DHCPREQUEST to indicate it wants to accept that offer (and to tell all servers which option it has chosen). The server concludes by sending DHCPACK, finalizing the lease and providing the client with the approved IP configuration (IP address, subnet mask, gateway, DNS, etc.). If something changes or the offer is no longer valid, a DHCPNAK may be sent instead. DHCP4 refers to the IPv4 DHCP protocol itself, not the four-step sequence. ARP is used for mapping an IP to a MAC address after the IP is chosen, not for obtaining the lease. DNS translates domain names to IP addresses, which is separate from obtaining an IP lease.

The process is a four-step exchange known by the acronym DORA: Discover, Offer, Request, Acknowledge. The client first broadcasts a DHCPDISCOVER to find any DHCP server on the network. A server responds with a DHCPOFFER that includes an available IP address and lease terms. The client then sends DHCPREQUEST to indicate it wants to accept that offer (and to tell all servers which option it has chosen). The server concludes by sending DHCPACK, finalizing the lease and providing the client with the approved IP configuration (IP address, subnet mask, gateway, DNS, etc.). If something changes or the offer is no longer valid, a DHCPNAK may be sent instead.

DHCP4 refers to the IPv4 DHCP protocol itself, not the four-step sequence. ARP is used for mapping an IP to a MAC address after the IP is chosen, not for obtaining the lease. DNS translates domain names to IP addresses, which is separate from obtaining an IP lease.