title
How the Internet Works for Developers - Pt 1 - Overview & Frontend

description
How does the internet work? Most people really don't have to know, but web developers have to know more and more as they grow in their career. These 2 videos cover how the internet works from a web development perspective. Also, check out part 2: How the internet works from a web developers perspective - pt 2 - backend: http://youtu.be/FTAPjr7vgxE At a high level, the internet is browsers making requests to servers and getting responses back. Each request contains headers that tell the server how to respond. The server responds with a response and a content-type, which tells the browser what to do with the response. If the content-type is text/html, then the browser knows to treat the response like an html file. If the content-type is image/jpeg, then the browser knows it's a jpeg file. This video covers how the browser parses the html document, and ways that you can improve the loading of your webpage with things like concatenating and minifying assets like javascript, css, etc. -~-~~-~~~-~~-~- Also watch: "Responsive Design Tutorial - Tips for making web sites look great on any device" https://www.youtube.com/watch?v=fgOO9YUFlGI -~-~~-~~~-~~-~-

detail
{'title': 'How the Internet Works for Developers - Pt 1 - Overview & Frontend', 'heatmap': [{'end': 150.364, 'start': 119.546, 'weight': 0.735}, {'end': 235.142, 'start': 193.834, 'weight': 0.832}, {'end': 438.83, 'start': 423.421, 'weight': 0.733}, {'end': 493.536, 'start': 471.034, 'weight': 0.831}], 'summary': 'Series provides an in-depth understanding of how the internet works for web developers, covering essential concepts, web page rendering, http requests, and methods, consolidating years of learning into a simplified explanation.', 'chapters': [{'end': 35.346, 'segs': [{'end': 35.346, 'src': 'embed', 'start': 1.434, 'weight': 0, 'content': [{'end': 8.117, 'text': "So in this video I'm going to try to cover the concept of how does the internet work from a web development perspective?", 'start': 1.434, 'duration': 6.683}, {'end': 10.097, 'text': 'What do you need to know about how the internet works?', 'start': 8.177, 'duration': 1.92}, {'end': 15.94, 'text': "And what I'm going to be covering in this is really stuff that took I'd say it took me at least five years, if not more,", 'start': 10.898, 'duration': 5.042}, {'end': 17.26, 'text': 'to kind of figure out along the way.', 'start': 15.94, 'duration': 1.32}, {'end': 18.841, 'text': "Because you don't know what you don't know.", 'start': 17.28, 'duration': 1.561}, {'end': 20.321, 'text': "You don't know what to Google for.", 'start': 18.941, 'duration': 1.38}, {'end': 23.102, 'text': "It'd be easy to learn if you knew what to Google for.", 'start': 20.381, 'duration': 2.721}, {'end': 26.143, 'text': 'But it takes five or sometimes 10 or more years.', 'start': 23.642, 'duration': 2.501}, {'end': 29.245, 'text': "Some people never pick up on stuff just because you're not exposed to it.", 'start': 26.203, 'duration': 3.042}, {'end': 29.945, 'text': "You don't know.", 'start': 29.285, 'duration': 0.66}, {'end': 35.346, 'text': "And so I'm going to kind of compile years worth of stuff and hopefully make it all really simple for you.", 'start': 30.405, 'duration': 4.941}], 'summary': 'Explaining internet workings for web development, condensing years of learning into simple concepts.', 'duration': 33.912, 'max_score': 1.434, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ1434.jpg'}], 'start': 1.434, 'title': 'Understanding how the internet works', 'summary': 'Covers the essential concepts of how the internet works from a web development perspective, consolidating years of learning into a simplified explanation.', 'chapters': [{'end': 35.346, 'start': 1.434, 'title': 'Understanding how the internet works', 'summary': 'Covers the essential concepts of how the internet works from a web development perspective, consolidating years of learning into a simplified explanation.', 'duration': 33.912, 'highlights': ['The complexity of understanding how the internet works from a web development perspective is emphasized, with the presenter mentioning that it took at least five years, if not more, to grasp the concepts.', 'The challenge of not knowing what to search for when trying to learn about internet workings is highlighted, with the presenter suggesting that it can take five or even 10 years to fully comprehend the subject.', "The presenter aims to simplify and condense years' worth of knowledge about how the internet works, indicating the intention to make the material easily understandable for the audience."]}], 'duration': 33.912, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ1434.jpg', 'highlights': ["The presenter aims to simplify and condense years' worth of knowledge about how the internet works, indicating the intention to make the material easily understandable for the audience.", 'The complexity of understanding how the internet works from a web development perspective is emphasized, with the presenter mentioning that it took at least five years, if not more, to grasp the concepts.', 'The challenge of not knowing what to search for when trying to learn about internet workings is highlighted, with the presenter suggesting that it can take five or even 10 years to fully comprehend the subject.']}, {'end': 711.919, 'segs': [{'end': 128.024, 'src': 'embed', 'start': 96.589, 'weight': 2, 'content': [{'end': 99.251, 'text': 'Tons of you guys probably know lots of these things.', 'start': 96.589, 'duration': 2.662}, {'end': 101.772, 'text': 'So if your intelligence gets insulted, just keep with me.', 'start': 99.311, 'duration': 2.461}, {'end': 103.333, 'text': "We're going to cover a lot of depth here.", 'start': 101.792, 'duration': 1.541}, {'end': 107.556, 'text': 'But when you plug into the internet, when you connect, you get an IP address.', 'start': 104.034, 'duration': 3.522}, {'end': 110.598, 'text': 'So a server is a box with an IP address.', 'start': 108.297, 'duration': 2.301}, {'end': 115.521, 'text': 'The reason your computer is not a server is you have an IP address.', 'start': 112.019, 'duration': 3.502}, {'end': 119.526, 'text': "If you go to Google.com, and type what's my IP address, it's going to show you your IP address.", 'start': 115.541, 'duration': 3.985}, {'end': 120.348, 'text': 'You have it right now.', 'start': 119.546, 'duration': 0.802}, {'end': 128.024, 'text': "So if anyone types in your IP address, it can access your computer just like a server, but you don't have server software running and installed.", 'start': 120.888, 'duration': 7.136}], 'summary': 'Connecting to the internet assigns an ip address, making computer accessible as a server.', 'duration': 31.435, 'max_score': 96.589, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ96589.jpg'}, {'end': 164.339, 'src': 'heatmap', 'start': 119.546, 'weight': 1, 'content': [{'end': 120.348, 'text': 'You have it right now.', 'start': 119.546, 'duration': 0.802}, {'end': 128.024, 'text': "So if anyone types in your IP address, it can access your computer just like a server, but you don't have server software running and installed.", 'start': 120.888, 'duration': 7.136}, {'end': 129.886, 'text': "We'll get into that in the next video.", 'start': 128.505, 'duration': 1.381}, {'end': 136.652, 'text': "But if you type in, say, mysite.com, it doesn't know your server's IP address.", 'start': 130.545, 'duration': 6.107}, {'end': 144.158, 'text': "So what that's going to do is your internet service provider charter, say, is going to do a DNS lookup, a domain name service lookup.", 'start': 136.712, 'duration': 7.446}, {'end': 150.364, 'text': "It's going to say, hey, mysite.com, what IP address is that configured? Ah, that's configured to this guy right here.", 'start': 144.519, 'duration': 5.845}, {'end': 152.266, 'text': "Well, let's send you to that box.", 'start': 150.704, 'duration': 1.562}, {'end': 155.59, 'text': 'So your request for mysite.com goes to this box.', 'start': 152.326, 'duration': 3.264}, {'end': 164.339, 'text': 'So say google.com, your ISP takes that and it routes you to whatever IP address google.com has configured.', 'start': 156.551, 'duration': 7.788}], 'summary': 'Explains how dns lookup routes requests to server ip addresses.', 'duration': 44.793, 'max_score': 119.546, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ119546.jpg'}, {'end': 235.142, 'src': 'heatmap', 'start': 193.834, 'weight': 0.832, 'content': [{'end': 194.775, 'text': 'I can get back anything.', 'start': 193.834, 'duration': 0.941}, {'end': 196.556, 'text': 'The server can give me anything it wants.', 'start': 194.815, 'duration': 1.741}, {'end': 200.499, 'text': "My browser knows what it's giving me by the content type.", 'start': 196.956, 'duration': 3.543}, {'end': 205.062, 'text': "So I'm going to get a response back that is both the file and the content type.", 'start': 200.839, 'duration': 4.223}, {'end': 213.529, 'text': 'So when I say mysite.com, server gives me the index.html file and it sets a content type of text slash HTML.', 'start': 205.502, 'duration': 8.027}, {'end': 215.731, 'text': 'Now my browser knows what to do with it.', 'start': 214.09, 'duration': 1.641}, {'end': 217.773, 'text': "Ah, let's treat it like HTML.", 'start': 216.071, 'duration': 1.702}, {'end': 220.896, 'text': 'And so it begins parsing your HTML document.', 'start': 218.133, 'duration': 2.763}, {'end': 226.44, 'text': 'What that parsing process looks like, for the most part it goes head to toe, start to finish.', 'start': 221.576, 'duration': 4.864}, {'end': 230.035, 'text': 'and it pauses when it finds a request for an asset.', 'start': 227.752, 'duration': 2.283}, {'end': 235.142, 'text': "An asset is another request that we have to make, like it's another file we need.", 'start': 230.496, 'duration': 4.646}], 'summary': 'The server delivers files with content type, browser parses html document, and requests assets as needed.', 'duration': 41.308, 'max_score': 193.834, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ193834.jpg'}, {'end': 230.035, 'src': 'embed', 'start': 200.839, 'weight': 3, 'content': [{'end': 205.062, 'text': "So I'm going to get a response back that is both the file and the content type.", 'start': 200.839, 'duration': 4.223}, {'end': 213.529, 'text': 'So when I say mysite.com, server gives me the index.html file and it sets a content type of text slash HTML.', 'start': 205.502, 'duration': 8.027}, {'end': 215.731, 'text': 'Now my browser knows what to do with it.', 'start': 214.09, 'duration': 1.641}, {'end': 217.773, 'text': "Ah, let's treat it like HTML.", 'start': 216.071, 'duration': 1.702}, {'end': 220.896, 'text': 'And so it begins parsing your HTML document.', 'start': 218.133, 'duration': 2.763}, {'end': 226.44, 'text': 'What that parsing process looks like, for the most part it goes head to toe, start to finish.', 'start': 221.576, 'duration': 4.864}, {'end': 230.035, 'text': 'and it pauses when it finds a request for an asset.', 'start': 227.752, 'duration': 2.283}], 'summary': 'Server responds with index.html and sets content type as text/html, allowing browser to parse the html document.', 'duration': 29.196, 'max_score': 200.839, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ200839.jpg'}, {'end': 383.705, 'src': 'embed', 'start': 350.94, 'weight': 4, 'content': [{'end': 353.402, 'text': 'Another wise thing is you want to concatenate.', 'start': 350.94, 'duration': 2.462}, {'end': 357.425, 'text': 'You want to add all your scripts files together as much as possible.', 'start': 353.442, 'duration': 3.983}, {'end': 360.287, 'text': 'so instead of loading 10 different JavaScript files,', 'start': 357.425, 'duration': 2.862}, {'end': 366.852, 'text': "it's really going to speed things up if you can put those all into one JavaScript file and then you only have to make one request.", 'start': 360.287, 'duration': 6.565}, {'end': 368.173, 'text': 'talk to the server one time.', 'start': 366.852, 'duration': 1.321}, {'end': 369.974, 'text': 'give me scripts.js.', 'start': 368.173, 'duration': 1.801}, {'end': 373.897, 'text': "that gets added in, and now you've not made near as many requests.", 'start': 369.974, 'duration': 3.923}, {'end': 377.12, 'text': "you've not paused your page near as often.", 'start': 373.897, 'duration': 3.223}, {'end': 383.705, 'text': "same thing with CSS files keep them broken up while you're developing, but then, when you deploy to production,", 'start': 377.12, 'duration': 6.585}], 'summary': 'Concatenate script files to reduce requests and speed up page load.', 'duration': 32.765, 'max_score': 350.94, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ350940.jpg'}, {'end': 451.697, 'src': 'heatmap', 'start': 423.421, 'weight': 0.733, 'content': [{'end': 426.483, 'text': 'The other way you can make asset requests is through JavaScript.', 'start': 423.421, 'duration': 3.062}, {'end': 432.786, 'text': "JavaScript can do what's called an XHR request or an AJAX request, they're often called.", 'start': 427.003, 'duration': 5.783}, {'end': 438.83, 'text': "And so JavaScript can say you know real time when you click on a link, javascript doesn't take you anywhere.", 'start': 433.167, 'duration': 5.663}, {'end': 442.872, 'text': "instead it says ah, let's go make a request for the most recent five tweets.", 'start': 438.83, 'duration': 4.042}, {'end': 447.174, 'text': 'that response comes back and instead of going to the html page, it goes into javascript.', 'start': 442.872, 'duration': 4.302}, {'end': 449.596, 'text': 'and javascript does something smart with those.', 'start': 447.174, 'duration': 2.422}, {'end': 451.697, 'text': 'javascript can also make requests for images.', 'start': 449.596, 'duration': 2.101}], 'summary': 'Javascript can make xhr or ajax requests for assets like tweets and images.', 'duration': 28.276, 'max_score': 423.421, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ423421.jpg'}, {'end': 497.019, 'src': 'heatmap', 'start': 451.697, 'weight': 0, 'content': [{'end': 454.238, 'text': 'it can make requests for css files.', 'start': 451.697, 'duration': 2.541}, {'end': 459.721, 'text': 'it can make requests for pretty much anything, because after all, a request is just a request to the server.', 'start': 454.238, 'duration': 5.483}, {'end': 463.003, 'text': 'the server determines what you get back by its content type.', 'start': 459.721, 'duration': 3.282}, {'end': 466.988, 'text': "So that's kind of the browser world of things.", 'start': 463.783, 'duration': 3.205}, {'end': 470.633, 'text': "Before I close out this video, let's look at some sample requests.", 'start': 467.529, 'duration': 3.104}, {'end': 472.596, 'text': "Let's look at what's going on.", 'start': 471.034, 'duration': 1.562}, {'end': 477.603, 'text': 'And so a request contains two things.', 'start': 474.218, 'duration': 3.385}, {'end': 478.404, 'text': 'It contains headers.', 'start': 477.663, 'duration': 0.741}, {'end': 481.187, 'text': 'and it may or may not contain a post body.', 'start': 479.105, 'duration': 2.082}, {'end': 485.67, 'text': "So let's look at when I request, I loaded google.com here, google.com.", 'start': 481.647, 'duration': 4.023}, {'end': 493.536, 'text': 'So my first request if you open your developer console and go to network and refresh your page, I can see right here.', 'start': 486.411, 'duration': 7.125}, {'end': 497.019, 'text': 'my first request was www.google.com.', 'start': 493.536, 'duration': 3.483}], 'summary': 'Server determines response by content type; requests contain headers and possibly a post body.', 'duration': 45.322, 'max_score': 451.697, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ451697.jpg'}, {'end': 668.791, 'src': 'embed', 'start': 638.664, 'weight': 5, 'content': [{'end': 641.088, 'text': 'Anything in the 300s means you got redirected.', 'start': 638.664, 'duration': 2.424}, {'end': 648.075, 'text': "Anything in the 400s means there was an error or it's not found or you're not logged in so you can't access it.", 'start': 642.089, 'duration': 5.986}, {'end': 652.178, 'text': 'Anything in the 500s says the server broke, it blew up.', 'start': 648.835, 'duration': 3.343}, {'end': 656.843, 'text': "You either gave it something it wasn't expecting or there's a problem on their end.", 'start': 652.659, 'duration': 4.184}, {'end': 657.844, 'text': "That's what a 500 level error is.", 'start': 656.883, 'duration': 0.961}, {'end': 661.947, 'text': "So that's kind of what a status code is.", 'start': 659.605, 'duration': 2.342}, {'end': 663.067, 'text': 'JavaScript will look for that.', 'start': 661.987, 'duration': 1.08}, {'end': 668.791, 'text': 'Sometimes JavaScript will make a request, and a 400, a 404, a 403, those are all considered errors.', 'start': 663.147, 'duration': 5.644}], 'summary': 'Http status codes provide information about errors and server issues. 400s indicate client errors, 500s indicate server errors.', 'duration': 30.127, 'max_score': 638.664, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ638664.jpg'}], 'start': 35.726, 'title': 'Internet and web page rendering', 'summary': 'Covers internet basics in web development, including browser-server interaction, ip addresses, and dns lookup. it also discusses web page rendering, asset requests, html parsing, optimizing performance, and the significance of status codes in requests and responses.', 'chapters': [{'end': 177.287, 'start': 35.726, 'title': 'Internet for web development', 'summary': 'Discusses the basics of internet from a web development point of view, emphasizing the interaction between browsers and servers, and the process of requesting and receiving responses, while also touching on ip addresses and dns lookup.', 'duration': 141.561, 'highlights': ['The internet is essentially the interaction between browsers and servers, where machines make requests to servers and receive responses. Interaction between browsers and servers, request and response process', 'A server is just another machine connected to the internet, with each machine getting an IP address upon connection. Definition of a server, IP address acquisition process', 'The process involves DNS lookup, where the domain name is used to retrieve the configured IP address for the requested website. Explanation of DNS lookup and its role in website access']}, {'end': 711.919, 'start': 177.787, 'title': 'Web page rendering and asset requests', 'summary': 'Explains the process of web page rendering, the importance of asset requests in html parsing, and optimizing performance by concatenating and minifying css and javascript files, as well as the significance of status codes in requests and responses.', 'duration': 534.132, 'highlights': ['The server responds with the file and the content type, such as text/HTML for an HTML file, enabling the browser to parse the document accordingly. When the server responds to a request for a site, it provides the file along with the content type, allowing the browser to interpret and parse the document appropriately.', 'Optimizing performance by concatenating CSS and JavaScript files into single files reduces the number of requests, thereby enhancing page loading speed. Combining multiple CSS or JavaScript files into a single file reduces the number of requests made to the server, leading to faster page loading.', 'The significance of status codes in requests and responses is explained, where status codes starting with 2 indicate success, 3 denote redirection, 4 imply an error or not found, and 5 suggest server issues. The chapter provides insights into the importance of status codes in requests and responses, with codes starting with 2 representing success, 3 indicating redirection, 4 denoting errors or not found, and 5 suggesting server problems.']}], 'duration': 676.193, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ35726.jpg', 'highlights': ['Interaction between browsers and servers, request and response process', 'Explanation of DNS lookup and its role in website access', 'Definition of a server, IP address acquisition process', 'When the server responds to a request for a site, it provides the file along with the content type, allowing the browser to interpret and parse the document appropriately', 'Combining multiple CSS or JavaScript files into a single file reduces the number of requests made to the server, leading to faster page loading', 'The chapter provides insights into the importance of status codes in requests and responses, with codes starting with 2 representing success, 3 indicating redirection, 4 denoting errors or not found, and 5 suggesting server problems']}, {'end': 922.943, 'segs': [{'end': 772.094, 'src': 'embed', 'start': 738.669, 'weight': 0, 'content': [{'end': 743.764, 'text': "Let's look at a couple sample requests in writing and then we'll be done with this video.", 'start': 738.669, 'duration': 5.095}, {'end': 745.79, 'text': "We'll move on to the backend, the server stuff.", 'start': 743.784, 'duration': 2.006}, {'end': 749.903, 'text': "So, you make a homepage request to google.com, you're going to do a get request.", 'start': 746.641, 'duration': 3.262}, {'end': 751.944, 'text': "I probably haven't covered it yet.", 'start': 750.563, 'duration': 1.381}, {'end': 754.005, 'text': "I'll give you a brief demonstration.", 'start': 752.284, 'duration': 1.721}, {'end': 757.546, 'text': 'My jQuery tutorial covers a lot of what the different methods are.', 'start': 754.345, 'duration': 3.201}, {'end': 759.588, 'text': 'Get just says give me a resource.', 'start': 758.047, 'duration': 1.541}, {'end': 762.289, 'text': "I'm not passing anything with that usually.", 'start': 759.608, 'duration': 2.681}, {'end': 772.094, 'text': "A get request, a post request is for when you're usually creating something new or when you're doing something basic like a login.", 'start': 762.729, 'duration': 9.365}], 'summary': 'The video covers sample requests, including get and post, for backend development.', 'duration': 33.425, 'max_score': 738.669, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ738669.jpg'}, {'end': 887.779, 'src': 'embed', 'start': 843.536, 'weight': 2, 'content': [{'end': 847.78, 'text': 'Get something, create something, update something, delete something.', 'start': 843.536, 'duration': 4.244}, {'end': 850.163, 'text': "And so that's what your method is.", 'start': 848.621, 'duration': 1.542}, {'end': 854.555, 'text': 'The path, we already covered path.', 'start': 852.092, 'duration': 2.463}, {'end': 855.476, 'text': 'Path is the path.', 'start': 854.716, 'duration': 0.76}, {'end': 856.918, 'text': "There's your user agent.", 'start': 855.897, 'duration': 1.021}, {'end': 857.859, 'text': 'The backend will.', 'start': 856.998, 'duration': 0.861}, {'end': 863.526, 'text': "sometimes, if you have a massive website, sometimes the backend will look at this and say oh, they're on an iPhone, they're on a mobile device.", 'start': 857.859, 'duration': 5.667}, {'end': 866.37, 'text': "Let's send them to a completely different website that's just for mobile.", 'start': 863.847, 'duration': 2.523}, {'end': 869.313, 'text': "So that's kind of why that user agent is important.", 'start': 867.13, 'duration': 2.183}, {'end': 872.015, 'text': "And then here's a sample post request.", 'start': 870.234, 'duration': 1.781}, {'end': 873.955, 'text': 'Say I was doing a login.', 'start': 872.435, 'duration': 1.52}, {'end': 876.816, 'text': 'I would do a post method to slash login.', 'start': 873.975, 'duration': 2.841}, {'end': 879.437, 'text': 'My content type would be application JSON.', 'start': 877.376, 'duration': 2.061}, {'end': 883.398, 'text': 'And my request body would be a JSON object.', 'start': 879.957, 'duration': 3.441}, {'end': 885.159, 'text': 'Username this, password this.', 'start': 883.598, 'duration': 1.561}, {'end': 887.779, 'text': 'My response would be 200 OK.', 'start': 885.639, 'duration': 2.14}], 'summary': 'Method includes get, create, update, delete. backend may redirect to mobile site based on user agent. sample post request for login returns 200 ok.', 'duration': 44.243, 'max_score': 843.536, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ843536.jpg'}], 'start': 711.919, 'title': 'Http requests and methods', 'summary': 'Explores http requests to load webpages, focusing on a sample request to google.com, and explains various http request methods including get, post, put, and delete, with examples and the importance of the user-agent header.', 'chapters': [{'end': 759.588, 'start': 711.919, 'title': 'Http requests and responses', 'summary': 'Explores the process of making http requests to load a webpage, with a focus on a sample request to google.com, indicating the use of a get request and a mention of further backend server topics.', 'duration': 47.669, 'highlights': ['The process of making HTTP requests to load a webpage is demonstrated, with a focus on a sample request to google.com, using a get request.', 'Mention of transitioning to backend server topics after covering the demonstration of making homepage requests to google.com using a get request.', 'Discussion about the different methods for making HTTP requests, with a reference to a jQuery tutorial covering various methods.']}, {'end': 922.943, 'start': 759.608, 'title': 'Http requests and methods', 'summary': 'Explains the various http request methods, including get, post, put, and delete, and their purposes in creating, updating, and deleting resources, with examples and the importance of the user-agent header, concluding with a sample post request for login and its expected response.', 'duration': 163.335, 'highlights': ['The chapter explains the various HTTP request methods, including GET, POST, PUT, and DELETE, and their purposes in creating, updating, and deleting resources. Various HTTP request methods: GET, POST, PUT, DELETE', 'The importance of the User-Agent header is explained in the context of server-side decisions to cater to different devices or platforms. User-Agent header used for device-specific decisions', 'A sample POST request for login is provided, including the method, content type, request body, and expected response. Sample POST request for login with method, content type, request body, and expected response']}], 'duration': 211.024, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/e4S8zfLdLgQ/pics/e4S8zfLdLgQ711919.jpg', 'highlights': ['The chapter explains the various HTTP request methods, including GET, POST, PUT, and DELETE, and their purposes in creating, updating, and deleting resources. Various HTTP request methods: GET, POST, PUT, DELETE', 'The process of making HTTP requests to load a webpage is demonstrated, with a focus on a sample request to google.com, using a get request.', 'The importance of the User-Agent header is explained in the context of server-side decisions to cater to different devices or platforms. User-Agent header used for device-specific decisions', 'Mention of transitioning to backend server topics after covering the demonstration of making homepage requests to google.com using a get request.', 'Discussion about the different methods for making HTTP requests, with a reference to a jQuery tutorial covering various methods.', 'A sample POST request for login is provided, including the method, content type, request body, and expected response. Sample POST request for login with method, content type, request body, and expected response']}], 'highlights': ["The presenter aims to simplify and condense years' worth of knowledge about how the internet works, indicating the intention to make the material easily understandable for the audience.", 'The complexity of understanding how the internet works from a web development perspective is emphasized, with the presenter mentioning that it took at least five years, if not more, to grasp the concepts.', 'The challenge of not knowing what to search for when trying to learn about internet workings is highlighted, with the presenter suggesting that it can take five or even 10 years to fully comprehend the subject.', 'Interaction between browsers and servers, request and response process', 'Explanation of DNS lookup and its role in website access', 'Definition of a server, IP address acquisition process', 'When the server responds to a request for a site, it provides the file along with the content type, allowing the browser to interpret and parse the document appropriately', 'Combining multiple CSS or JavaScript files into a single file reduces the number of requests made to the server, leading to faster page loading', 'The chapter provides insights into the importance of status codes in requests and responses, with codes starting with 2 representing success, 3 indicating redirection, 4 denoting errors or not found, and 5 suggesting server problems', 'The chapter explains the various HTTP request methods, including GET, POST, PUT, and DELETE, and their purposes in creating, updating, and deleting resources. Various HTTP request methods: GET, POST, PUT, DELETE', 'The process of making HTTP requests to load a webpage is demonstrated, with a focus on a sample request to google.com, using a get request.', 'The importance of the User-Agent header is explained in the context of server-side decisions to cater to different devices or platforms. User-Agent header used for device-specific decisions', 'Mention of transitioning to backend server topics after covering the demonstration of making homepage requests to google.com using a get request.', 'Discussion about the different methods for making HTTP requests, with a reference to a jQuery tutorial covering various methods.', 'A sample POST request for login is provided, including the method, content type, request body, and expected response. Sample POST request for login with method, content type, request body, and expected response']}