<div style='margin-bottom: 20px;'> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">Why are domain names used instead of IP addresses?</h2> <p style="font-weight: normal; font-size: 1.2rem;">Domain names are used because they provide a humanly-meaningful, text-based identifier that is easier to remember than numeric IP addresses.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">How does the client-server model fundamentally operate?</h2> <p style="font-weight: normal; font-size: 1.2rem;">The server offers some service, and the client requests this service, with the server waiting for requests from the client.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the primary function of a server in a network?</h2> <p style="font-weight: normal; font-size: 1.2rem;">A server manages a shareable resource and offers an acceptable level of service to users.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What is the purpose of the Domain Name System (DNS)?</h2> <p style="font-weight: normal; font-size: 1.2rem;">DNS is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network.</p> </div> <div style="margin-bottom: 10px; background-color: #f2f2f2; border-radius: 1rem; padding: 10px 20px;"> <h2 style="font-weight: bold; margin-bottom: 3px; font-size: 1.5rem;">What types of mappings are possible with DNS host entries?</h2> <p style="font-weight: normal; font-size: 1.2rem;">1-1 mapping between domain name and IP address, multiple domain names mapping to the same IP address, a single domain name mapping to multiple IP addresses, and some domain names not mapping to any IP address.</p> </div> </div>