D. Clarke's Solution 20. Consider two hosts A (elient) and B (server) going through the 3-wayhandshaie mechanism of establishing a TCP connection. Assume that the connection request segment has a sequence number "1220' and the response segmest bas the sequence number 4'. The table below denotes the sequence of segment exchange for s handshake between the 2 hosts."Sequence Number" (SN)."-Acknowledgement Nmber (AN) and the bit pattern for "URG, ACK, PSH, RST, SYN, FIN in each segmt exchanged between the two hosts are shown below. How many mistakes are there in the table: A's segment numbers AN: B's segment numbers URG, ACK, PSH. RST, SYN, FIN Connection AN: Request A: 000010 B: SN: 1220 SN Connection AN: - ACK AN: 1221 SN: 4 A: B: 010010 SN: - ACK-ing the AN: 5 ACK AN:- SN ?: 010010 B: SN: 1221 Assume that a client types www.extraordinarydesserts.com in his browser window. Also assume that this particular website uses the Akamai CDN services to speed up the user experience which means that certain image/audio files (in this example the image black forest_cakejpg)are hosted by the CDN's server which are strategically distributed all across the globe. With that background information, answer the following questions: 21. When a user types www.extraordinarydesserts.com in his browser window, the DN returns the IP address of which server to retrieve the webpage from? A. Extraordinary Dessert's server B. Local ISP's Server C. Akamai's "Intelligent" Server D. Akamai's Proxy Server closest to Client 22. When the user clicks on the black_ forest_cake.jpg, the DNS returns the IP address A. Extraordinary Dessert's server B. Local ISP's Serve C. Akamai's "Intelligent" Server D. Akamai's Proxy Server closest to Client