Question: Q6 Dynamic DNS 15 Points Dynamic DNS is a protocol that enables a host to inform a DNS name server as its IP changes

Q6 Dynamic DNS 15 Points Dynamic DNS is a protocol that enables a host to inform a DNS name server as its IP changes over time. For example, if a host reserves foo.bar.com, the host will tell the DNS server periodically what its current IP address is, and the server will update the DNS record to reflect this new IP address. This service is well-suited for hosts that do not have a long-lived (static) IP address. Q6.1 Stale data 5 Points If you were designing Dynamic DNS, how would you prevent returning a stale IP-host name mapping even if the host's IP address frequently changes? Enter your answer here Save Answer Q6.2 Downsides 5 Points Given the answer to the previous question, is there a potential disadvantage of Dynamic DNS in terms of lookup latency performance for clients? Enter your answer here Save Answer Q6.3 NATS 5 Points Suppose a web server behind a NAT is using Dynamic DNS. Explain what the DNS entry for this web server should look like and how to configure NAT in order to make the server publicly accessible (you may assume the web server uses the port 80). Enter your answer here Save Answer

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