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DHCP stands for Dynamic Host Configuration Protocol, which uses UDP protocol as transport layer protocol, uses port number 68 and 67. DHCP uses DORA, process to assign IP address to the client machines. D: Discovery O: Offer R: Request A: Acknowledge

DNS Stands for Domain Name System, Server, Service which is useful to reslove a hostname into IP. Know more about DNS Root Server: https://root-servers.org/ To check DNS Record information: https://mxtoolbox.com/SuperTool.aspx