In the Wireshark capture. An appropriate form for an HTTP request is as follows:

Question

In the Wireshark capture.

An appropriate form for an HTTP request is as follows:

GET / HTTP/1.1

Host: 172.30.42.19

What is the request in this frame? (red highlight)

What response did the server answer with (blue highlight)?

looking at appear to be an appropriately formatted HTTP request? If not, what's wrong?

490.039415 HTTP 537 HTTP/1.1 400 Bad Request (text/html) 192.168.12.143 172.19.36.129 54 33207-80 [ACK] Seq 30 Ack 484 win 30016 L 0 en 500.039430 192.168.12.143 172.19.36.129 TCP TCP 60 80 33207 [FIN, PSH, ACK] Seq 484 Ack 30 Win 64239 Len 0 51 0.039462 172.19.36.129 192.168.12.143 Wireshark. Follow TCP Stream (tcp.stream eq 4). week6 GET HTTP/1.1 127.0.0.1. HTTP/1.1 400 Bad Request Date: Thu, 30 Apr 2015 18:39:11 GMT Server: Apache/2.4.10 (Ubuntu) Content-Length: 301 Connection: close Content-Type: text/html; charset iso-8859-1 DOCTYPE HTML PUBLIC IETF DTD HTML 2.0//EN"

Explanation / Answer

a) In the red highlights. Is local loopback address http hit request captures
b) As it was a http port request only the local system couldn't get it because there is no active http port
c) Its going wrong because the primary port scanner protocol is http not tcp

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