1. Answer the following questions based on ports and port numbers. a. What are the three...

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1. Answer the following questions based on ports and port numbers. a. What are the three different types of port number ranges as defined by IANA? b. Your host computer is contacting a web server asking for a webpage. Which protocol at the transport layer would be used to get the IP address of the server? c. What port numbers will be used by your host computer for the "Source Port": "Destination Port" fields. 2. Answer the following questions regarding DNS. a. Whom does a host computer contact when asking for name resolution, assuming the host computer does not have the translation stored in its cache? b. What flag is set in the DNS Message protocol for a query to be recursive? c. In a Resource Record, what does the "type" field represent? d. The host computer contacts its local DNS server which has the following cache entries. Cache Client's DNS Type SOA mail.totalsem.com NS Name IP server 201.2.58.5 52.38.198.42 14.76.215.108 nsl.fred.com www.google.com SOA en.wikipedia.org www.usa.gov NS A 85.145.26.8 68.72.214.9 85.104.189.72 A nsl.blahblah.com d1. The host computer is searching for www.microsoft.com, what should it do? d2. After the above query is replied to, the host computer user again types www.microsoft.com, what would happen now? 1. Answer the following questions based on ports and port numbers. a. What are the three different types of port number ranges as defined by IANA? b. Your host computer is contacting a web server asking for a webpage. Which protocol at the transport layer would be used to get the IP address of the server? c. What port numbers will be used by your host computer for the "Source Port": "Destination Port" fields. 2. Answer the following questions regarding DNS. a. Whom does a host computer contact when asking for name resolution, assuming the host computer does not have the translation stored in its cache? b. What flag is set in the DNS Message protocol for a query to be recursive? c. In a Resource Record, what does the "type" field represent? d. The host computer contacts its local DNS server which has the following cache entries. Cache Client's DNS Type SOA mail.totalsem.com NS Name IP server 201.2.58.5 52.38.198.42 14.76.215.108 nsl.fred.com www.google.com SOA en.wikipedia.org www.usa.gov NS A 85.145.26.8 68.72.214.9 85.104.189.72 A nsl.blahblah.com d1. The host computer is searching for www.microsoft.com, what should it do? d2. After the above query is replied to, the host computer user again types www.microsoft.com, what would happen now?

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1 a IANA has classified the port number ranges in the following three categories Well Known Ports 0 ... View the full answer