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A client is accessing a website through its hostname; what TCP/IP protocol would find the correct IP address to send the packets to?
ICMP
DHCP
DNS
ARP
UDP
Domain Name System (DNS) resolve domain names (hostnames) to IP addresses. The purpose of DNS is so users can easily memorize hostnames instead of IP addresses. DNS works with DNS Query and DNS response messages. ARP is a protocol that resolves MAC addresses with known IP addresses. UDP is a layer 4 protocol used for transporting information in an unreliable manner. DHCP is used for dynamic host configuration. ICMP manages messages and reporting errors for IP. For more information refer to: [Todd Lammle. - CCNA Routing and Switching Study Guide 2013, Chapter 3]
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