Which of the following sentences is incorrect concerning HTTP?O a. Most of GET requests do not have a message bodyO b. Attackers can obtain sensitive information by observing the contents of POST request messageO c.The POST method is used to request the webserver to accept the data enclosed in the bodyO d. All HTTP messages consist of an optional body followed by one message header

Q:Which of following is incorrect regarding HTTP?

Answered: Which of the following sentences is…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Which one of the following statements is NOT correct about HTTP cookies? a. A cookies is a piece of code that has the potential to compromise the security of an Internet user b. A cookie gains entry to the user’s work area through an HTTP header c. A cookie has an expiry date and time d. Cookies can be used to track the browsing pattern of a user at a particular site
Suppose a client sends an HTTP request message with the If-modified-since header. Sup- pose the object in a server has not changed since the last time a client retrieved the object. Then the server will send a response message with the status code: A. 200 OK B. 404 Not Found C. 304 Not Modified D. none of the above
Which JavaScript statement should you execute first to enable your program to send asynchronous requests to the server over HTTP? a. xhr.send(null); b. let myReq = XMLHttpRequest.open(); c. let myReq = new httpRequest(); d. let myReq = new XMLHttpRequest();
1) Which of the following are HTTP Response headers? (There are multiple correct options. Please select all of them.) Group of answer choices a.Content-Type b.Set-Cookie c.User-Agent d.Accept e.Cookie 2) Suppose an HTTP response contains the status code 411. It indicates that Group of answer choices a.the requested resource has moved. b.request was processed successfully. c.there is some problem in the request. d.further action from the client is needed. e.an exception happened on the server. 3) Which of the following Java class can you use to write an image stored in memory to disk? Group of answer choices a.FileWriter b.File c.FileOutputStream d.ByteArrayOutputStream
An attacker tries to do banner grabbing on a remote web server and executes the following command:$ nmap -sV hackme.com -p 80 He gets the following output:Starting Nmap 7.90 ( http://nmap.org ) at 2020-09-26 22:47 ESTNmap scan report for hackme.com (108.58.137.114)Host is up (0.048s latency).PORT STATE SERVICE VERSION80/tcp open http Apache httpdService detection performed. Please report any incorrect results at http://nmap.org/submit/.Nmap done: 1 IP address (1 host up) scanned in 7.36 seconds What did the hacker accomplish? nmap can’t retrieve the version number of any running remote service. The hacker successfully completed the banner grabbing. The hacker should have used nmap -O host.domain.com. The hacker failed to do banner grabbing as he didn’t get the version of the Apache web server.
There are two files, PingProgram.docx and GetHostByName.docx. PingProgram needs an IP address to work, and doesn’t use URLs, as per the example below. GetHostByName will return an IP address given a URL, also shown below. GetHostByName takes in a URL and a port number. Rewrite PingProgram to do the following: 1.Accept either a URL or an IP address as an input. 2.Ping the requested server 3 times instead of once. 3.Present all 3 round trip times, along with an average round trip time.
Using the xhr variable, initialize a connection to GET https://wp.zybooks.com/grades.php?name=Katie, set the response type to json, then send the request. function responseReceivedHandler() {console.log("Response received");} var xhr = new XMLHttpRequest();xhr.addEventListener("load", responseReceivedHandler);
In which of the following applications, UDP is a suitable transport layerprotocol? (a)In SMTP, a user can send a long e-mail message, which may includemultimedia. When a user sends a message, the recipient does not expectto receive a response quickly. (b)A user needs to download a very large text file from the internet. Theuser doesn’t want part of the file to be missing or corrupted when he/sheopens the file. The delay created between the delivery of the parts arenot an overriding concern for him. (c)In DNS, a client needs to send a short request to a server and to receive a quick response from it. The request and response can each fit in one userdatagram.
True or false? HTTP response messages never have an empty message body
4. The text below shows the reply sent from a server in response to an HTTP GET message as captured by Wireshark. HTTP/1.1 200 OK\r\n Date: Fri, 27 Jan 2023 21:23:36 GMT\r\n Server: Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/7.4.33 mod_perl/2.0.11 Perl/v5.16.3\r\n Last-Modified: Tue, 01 Mar 2016 18:57:50 GMT\r\n ETag: "a5b-52d015789ee9e"\r\n Accept-Ranges: bytes\r\n Content-Length: 2651\r\n Keep-Alive: timeout=5, max=100\r\n Connection: Keep-Alive\r\n Content-Type: text/html; charset=UTF-8\r\n \r\n [HTTP response 1/1] [Time since request: 0.035874000 seconds] [Request in frame: 784] [Request URI: http://gaia.cs.umass.edu/] File Data: 2651 bytes Line-based text data: text/html (68 lines) <html>\n <head>\n <title>Computer Network Research Group - UMass Amherst\n </title>\n </head>\n <body bgcolor="#ffffff">\n More document text follows, though not shown here. Answer the following questions, indicating where in the message above you find the…
This is the link to the aforementioned clip, so the picture depends on it https://youtu.be/p3q5zWCw8J4
A browser sends an HTTP request to a web server on port 80. One line of the request is "GET / HTTP/1.1". Explain the purpose of the request,and describe the process that will be used to prepare the response. It is not necessary to show actual content of the HTTP response.

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