Which of the following statements is/are true with respect to the interaction of a web browser with a web server using HTTP 1.1?

The correct statements regarding the interaction of a web browser with a web server using HTTP 1.1 are:

• HTTP 1.1 facilitates downloading multiple objects of the same webpage over the same TCP connection, if the objects are stored in the same server.
• HTTP 1.1 facilitates sending a request for downloading one object without waiting for a previously requested object to be downloaded completely.
• HTTP 1.1 facilitates downloading multiple webpages on the same server to be downloaded over a single TCP connection.
• HTTP 1.1 facilitates downloading multiple objects of the same webpage over the same TCP connection, even if they are stored in different servers.

Let's break down the concepts of HTTP 1.1 to understand why these statements are correct:
1. Persistent Connections (Keep-Alive): By default, HTTP 1.1 uses persistent TCP connections. This means once a TCP connection is established between a client (browser) and a server, it can be kept open for multiple request-response cycles. Because of this, multiple objects (like images, stylesheets, or scripts) belonging to the same webpage can be downloaded over the same TCP connection if they reside on the same server. This also extends to downloading different webpages hosted on that same server over the same TCP connection.
2. Pipelining: HTTP 1.1 introduces pipelining, which allows a client to send multiple HTTP requests over a single persistent TCP connection without waiting for the corresponding responses to arrive. This allows a browser to request subsequent objects while a previous object is still being downloaded.
3. Multi-server Webpages and Connections: When a webpage contains objects stored on different servers (for example, CDNs, external APIs, or different domains), the browser can open separate TCP connections to each of those distinct servers. Within each of those individual TCP connections, the browser still uses HTTP 1.1 persistent connections to fetch the respective objects hosted on each server. Thus, HTTP 1.1 facilitates the overall process of downloading all objects of a webpage over their respective persistent connections, regardless of which server hosts them.