GATE CS 2026 Set 1 Q9 — Application Layer Protocols: DNS, SMTP, HTTP, FTP, Email

To determine the correct statements, let us analyze the key features of HTTP 1.1, specifically persistent connections and pipelining:

• Option A is True: By default, HTTP 1.1 uses persistent connections. This allows a client to request and download multiple objects of a webpage over a single, reused TCP connection, provided those objects reside on the same server.
• Option B is False: A TCP connection is a point-to-point connection established between a specific client (IP and port) and a specific server (IP and port). Therefore, objects stored on different servers cannot be downloaded over the same TCP connection; separate TCP connections must be established for each server.
• Option C is True: HTTP 1.1 supports pipelining. This feature allows a client to send multiple HTTP requests over a persistent TCP connection without waiting for the corresponding responses of the previously requested objects to be completely received.
• Option D is True: Persistent connections in HTTP 1.1 are not restricted to a single webpage. Multiple distinct webpages (or any resources) hosted on the same server can be requested and downloaded over the same persistent TCP connection.

Thus, the correct options are A, C, and D.