Question

HostA --------- --- R1 ---Internet --- WWW_server DNS ----------- A web browser on HostA sends an HTTP request to WWW_server. With which of the following does HostA establish TCP connection in this scenario?

a) Only R1 & WWW_server
b) Only WWW_server
c) Only DNS & WWW_server
d) DNS, R1 & WWW_server

Answer 1

In the described network interaction, the browser on HostA establishes a TCP connection only with the WWW_server after resolving the domain name through DNS. Routers are involved in data packet routing but do not establish a TCP connection.

Step-by-step explanation:

The question involves understanding how network connections are established over the internet, particularly in the scenario of a web browser on HostA sending an HTTP request to a WWW_server. In this scenario, HostA will first resolve the domain name of the WWW_server using DNS to obtain the server's IP address.

After DNS resolution, HostA establishes a TCP connection with the WWW_server directly. Routers like R1 are involved in the path of the data packets but a TCP connection is not established with them. Therefore, the browser on HostA establishes a TCP connection only with the WWW_server.

The correct answer to the question is option b) Only WWW_server.