Question 251 - N10-008 discussion

TheDynamic Host Configuration Protocol (DHCP)is a protocol that automatically assigns IPaddresses and other network configuration parameters to network devices12.DHCP uses aclient-server model, where a DHCP client requests an IP address from a DHCP server, and theDHCP server responds with an IP address and other information34.When a DHCP client and server are on the same physical network, the DHCP client broadcasts aDHCPDISCOVER message to find a DHCP server, and the DHCP server replies with a DHCPOFFERmessage containing an IP address offer34.The DHCP client then broadcasts a DHCPREQUESTmessage to request the IP address, and the DHCP server replies with a DHCPACK message toacknowledge the IP address assignment34.When a DHCP client and server are not on the same physical network, aDHCP relayis used toforward the DHCP messages between them56.A DHCP relay is a network device, such as arouter or a switch, that listens for DHCP broadcast messages on one network interface andrelays them to another network interface where the DHCP server is located56.The DHCP relayalso adds the IP address of the network interface where the DHCP client is located to the DHCPmessages, so that the DHCP server can determine which pool of IP addresses to use for theDHCP client56.The other options are not related to forwarding requests and replies between a DHCP serverand client.ADHCP leaseis the duration of time that a DHCP server assigns an IP address to aDHCP client78.ADHCP scopeis a range of IP addresses that a DHCP server can assign to DHCPclients on a specific network segment78. ADHCP rangeis a subset of a DHCP scope that definesthe start and end IP addresses that a DHCP server can assign to DHCP clients .Therefore, the best answer is A. Relay, which would be used to forward requests and repliesbetween a DHCP server and client.1:CompTIA Network+ N10-008 Certification Study Guide, page 215