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(c)(14 Points)Content of HTTP Request/Response.Below is the exact HTTP Response my browser gets from :HTTP/1.1 200 OKDate: Sun, 05 Nov 2017 06:33:44 GMTServer: Apache/2.2.31 (Unix) mod_ssl/2.2.31 OpenSSL/1.0.1e-fips PHP/5.3.29X-Content-Type-Options: nosniffX-Powered-By: PHP/5.3.29X-Drupal-Cache: MISSExpires: Sun, 19 Nov 1978 05:00:00 GMTCache-Control: public, max-age=3600X-Content-Type-Options: nosniffSet-Cookie: ms_iterator=1; expires=Tue, 05-Dec-2017 06:33:55 GMTContent-Language: enX-Generator: Drupal 7 ()Set-Cookie: SESS41e83d1cdf66542613ab508134bae06f=_nuwodTi8mg_Lrm_t5iBGmwkVUMhmZnrYHGSfTBJOa8;Etag: "1509863624-0"Last-Modified: Sun, 05 Nov 2017 06:33:44 GMTContent-Length: 7023Connection: CloseContent-Type: text/html; charset=utf-8a579<!DOCTYPE html><!--[if IEMobile 7]><html class="iem7" lang="en" dir="ltr"><![endif]-->............much more document text following here (not shown)..........gVNkNj6d2R_k4GgpZUz0vDg.js"></script></body></html>Answer the following questions and quickly justify your answer by pointing to the rele-vant part of the HTTP Response.i. Was the server able to successfully find the document or not?ii. At what date and time was this response sent?iii. When was the document last modified?iv. How many bytes are there in the document being returned?v. What are the first 5 bytes of the document being returned?vi. What are the last 5 bytes of the document being returned?vii. Is the connection in the reply persistent or non-persistent?6
4.(30 Points)Reliability Protocols: Go-back-N, Selective Repeat, TCP.Suppose that host A sendsN= 8 packets to host B using one of the following protocols welearnt in class (a) Go-Back-N (GBN) (b) Selective Repeat (SR) (c) TCP (considering onlyreliability, not congestion control). All protocols have (sender and/or receiver if applicable)window sizes equal to 5 packets and Timeout value equal to 10 ms. Assume that the Timeoutstartsbeforepacket transmission forALLprotocols (GBN, SR, TCP). The one-way propa-gation delay between host A and B, as well as from B to A, is 4ms, the transmission time ofeach data packet is 1ms, and the transmission time of each ACK packet is 0 ms.Suppose that Packet No. 5 is lost, the ACK generated when packet 2 is received is also lost,and no other packet is lost. The beginning of the space-time diagrams are provided below;the sequence numbers refer to packets.•Fill out the rest of the diagrams until all 8 packets are sent and acknowledged. Show all