Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that four DNS servers are visited before your host obtains the IP address. The first DNS server visited is the local DNS server, with an RTT delay of RTT$0=5$ msecs. The second, third, and fourth DNS servers contacted have a roundtrip time of RTT$1=32,$ RTT$2=11,$ and RTT$3=31$ msecs, respectively. Initially, assume that the Web page associated with the link contains exactly $1$ object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP $=37$ msecs. In the following questions, we assume no transmission delay for HTML requests$/$responses$.$

i$.$How much time $($in msec$)$ elapses from when the client clicks on the link until the client receives the object?

ii$.$Now suppose the HTML object references $8$ very small objects on the same server and assume that the local DNS server has already cached the web server$$s IP address. Neglecting transmission times, how much time $($in msec$)$ elapses from when the client clicks on the link until the base object and all $8$ additional objects are received from web server at the client, assuming non$-$persistent HTTP and up to $5$ parallel TCP connections?

iii.Which transport layer protocol is used by DNS$?$ Why?