What is web scraping a the use of a computer program as an...

What is web scraping? a. the use of a computer program as an automated process to retrieve information stored on a web page \( { }^{b} \) manually copying and pasting text from a web page into an excel file c. sending and retrieving data over the internet d. using a web browser to retrieve information from a web page

Transcript

00:01 Hello student here question is briefly explain how data are transmitted in the computer network using the scenario of a user using a web browser to visit a website for example fox news.

00:14 So here when a user uses a web browser to visit a website like fox news data is transmitted in the computer network through a series of steps.

00:23 So data are always transmitted number one domain name service which is called dns resolution.

00:28 The user enters a url in www .foxnews .com in their browser.

00:35 The browser sends a dns request to a dns server to resolve the human readable domain name www .foxnews .com with an into an ip address.

00:47 So we enter the domain name but this domain name is converted into the ip address.

00:52 So this ip address dns server returns the ip address.

00:59 Number two establish a connector.

01:01 The web browser uses a resolved ip address to establish a tcp transmission control protocol connection with the web server hosting fox news.

01:12 The connection is typically done over port 80 http 443 http for secure connection.

01:19 So to port we take 80 and 443 so establishing a connection after this http request hypertext protocol hyper hypertext transmission protocol.

01:32 Once the connection is established the browser sends an http request to the web server.

01:38 This request includes the information about the resources the browser is requesting such as specific web page along with any additional data like cookies or user agent information.

01:50 So here basically web page web page request is done.

01:56 After this web server processing now the web server received the http request process it and retrieve the request retrieve the requested web pages or the resources from its storage.

02:08 This might involve accessing database executing script or fetching content into the various source.

02:14 So this web page can be stored into the database executing scripting or fetching content.

02:21 So web page request retrieve.

02:24 So here requested web pages retrieve.

02:27 Now http response...

Question

Please give Ace some feedback