handshake, so that both the client and the server can verify that they agree on which host is in use. The |Origin| field is used to protect against unauthorized cross- origin use of a WebSocket server by scripts using the |WebSocket| API in a Web browser. The server specifies which orig...
This results in a variety of problems: o The server is forced to use a number of different underlying TCP connections for each client: one for sending information to the client, and a new one for each incoming message. o The wire protocol has a high overhead, with each client-to-server...
Techniques have been developed to reduce the number of HTTP requests by combining different resources. Content delivery networks (CDNs) have even been distributed around the world in an attempt to host commonly accessed resources closer to the Web browsers accessing them. Desp...
ERR_SSL_PROTOCOL_ERROR shows up when a web browser (most commonly Google Chrome), is not able to establish a secure connection over HTTPS. Chrome blocks access automatically to protect users from being able to use or navigate a website that either doesn’t have its SSL certificate configured ...
A Hypertext Transfer Protocol request typically includes the following elements: Request Method, URL, Headers, Body. Request Methods: Specifies the action to be performed. Common methods include: GET The HTTP GET method is commonly used to retrieve data from a specified resource on a server witho...
Abstract The WebSocket Protocol enables two-way communication between a client running untrusted code in a controlled environment to a remote host that has opted-in to communications from that code. The security model used for this is the origin-based security model commonly used by web browsers....
It is one of the most commonly used protocols over the Internet today. Telnet A terminal emulation protocol, defined in RFC854, for use over a TCP connection. It enables users to log in to remote hosts and use their resources from the local host. SMTP − Simple Mail Transfer Protocol A...
Define 'protocol' in a networking context Relate protocols to OSI model layers Learn about the most commonly used protocols on the Internet Related ContentInternet Protocol (IP) What is a packet? What is a port? What is routing? What is IPsec?
Meta-thread for the implementation of data extraction via a web browser. Motivation We need a way to extract data from websites which make it impossible to do this in a pure Python implementation, e.g. because of JS runtime and DOM requi...
Some commonly used request headers are shown in Table B-1. Table B-1 Common request headers Request header Description Accept The file types the client can accept. Authorization Used if the client wants to authenticate itself with a server; information such as the username and password...