2. (6+4 10 pts] Consider a web page for a mythical company dogmyth.com that contains the following embedded URLs (i.e., the following URLs are contained in the HTML source for the dogmyth.com home page): http://www dogmyth.com/logo gif http:ll www.ads dogmyth.com/dog-banner jpg http://www ads.cat bizlmeow-addjpg http://www.ads.bird bizlchirp-add jpg http://www catbiz happy-cat jps http:l/www.dogmyth.com/happy-dog jpg http://www2.dogmyth.com/cookie crumb Consider the DNS name resolution that is required for a browser to locate and request all components of this web page beginning with the home page URL http://www dogmyth com. Assume there is no browser cache of web objects, no web proxy server, and the browser's resolver does not cache any DNS results. In answering the following questions you may assume: The cache for the local authoritative DNS server is initially empty and no other resolvers attempt to use that server until all these HTTP requests are completely satisfied. The local authoritative DNS server always sends iterated queries. For the domain names in the above URLs, there is a different authoritative DNS server for each unique domain in the name hierarchy. Domain names with a prefix of "www" are all assigned to host machines (a) Show the contents of the cache on the local authoritative DNS server used by a browser accessing the the values of the name and type fields for the entry - show each type of entry (NS, A, etc) separately. b) How many DNS query/reply protocol message exchanges with other DNS servers are processed by the dogmyth.com home page after the page has been entirely fetched. For each entry in the cache, show only local authoritative DNS server during the process of fetching all components of the dogmyth.com home page? Explain how you obtained your answer 2. (6+4 10 pts] Consider a web page for a mythical company dogmyth.com that contains the following embedded URLs (i.e., the following URLs are contained in the HTML source for the dogmyth.com home page): http://www dogmyth.com/logo gif http:ll www.ads dogmyth.com/dog-banner jpg http://www ads.cat bizlmeow-addjpg http://www.ads.bird bizlchirp-add jpg http://www catbiz happy-cat jps http:l/www.dogmyth.com/happy-dog jpg http://www2.dogmyth.com/cookie crumb Consider the DNS name resolution that is required for a browser to locate and request all components of this web page beginning with the home page URL http://www dogmyth com. Assume there is no browser cache of web objects, no web proxy server, and the browser's resolver does not cache any DNS results. In answering the following questions you may assume: The cache for the local authoritative DNS server is initially empty and no other resolvers attempt to use that server until all these HTTP requests are completely satisfied. The local authoritative DNS server always sends iterated queries. For the domain names in the above URLs, there is a different authoritative DNS server for each unique domain in the name hierarchy. Domain names with a prefix of "www" are all assigned to host machines (a) Show the contents of the cache on the local authoritative DNS server used by a browser accessing the the values of the name and type fields for the entry - show each type of entry (NS, A, etc) separately. b) How many DNS query/reply protocol message exchanges with other DNS servers are processed by the dogmyth.com home page after the page has been entirely fetched. For each entry in the cache, show only local authoritative DNS server during the process of fetching all components of the dogmyth.com home page? Explain how you obtained your