What is Anycast DNS?
An introduction to Anycast DNS
HTTP headers are key-value pairs sent at the beginning of a request or response message as part of the HTTP (Hypertext Transfer Protocol). Headers provide information about the request or response, such as the type of browser being used, the type of data being sent, the server's expected behavior, and much more.
HTTP request headers provide information about the client's request, such as the type of content being sent, preferred languages, authentication details, etc. Here's an example of a typical HTTP request header:
GET /index.html HTTP/1.1
Host: www.example.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Here's an explanation of some key request headers:
HTTP response headers provide information about the server's response, including the status of the request and details about the data being sent back. Here's an example of a typical HTTP response header:
HTTP/1.1 200 OK
Date: Tue, 02 Aug 2023 08:00:00 GMT
Server: Apache/2.4.7
Last-Modified: Mon, 01 Jul 2023 07:28:00 GMT
Content-Length: 438
Content-Type: text/html; charset=UTF-8
Connection: close
Here's an explanation of some key response headers:
HTTP headers are a vital part of the web's architecture, enabling browsers and servers to exchange information in a standardized way. They help control various aspects of the communication between clients and servers, making the web a flexible and robust platform.
An introduction to Anycast DNS
An overview of the different types of browser hints and how they help with website performance
An overview of the cache control header sent by websites.
An introduction to CDNs (Content Delivery Network)
A quick description of CORS (Cross-origin resource sharing)
An overview of dynamic content caching.
© PEAKHOUR.IO PTY LTD 2025 ABN 76 619 930 826 All rights reserved.