Computer Networks Lecture 5: HTTP Protocol and Web Pages

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What is the role of the HTTP protocol in a client/server model?

It sends and receives web objects between clients and servers. (correct)
It establishes a secure connection between the client and server.
It handles the three-way handshake for TCP connections.
It translates the host name to the server IP address using the DNS.

What is the purpose of the Domain Name System (DNS) in the context of web pages?

It handles the encryption of web objects during transmission.
It manages the caching of web pages at the server-side.
It ensures the integrity of HTTP messages between clients and servers.
It translates host names to server IP addresses. (correct)

What is the significance of the port number 80 in the context of HTTP?

It allows web servers to listen for and accept HTTP requests. (correct)
It is used for initiating TCP connections between clients and servers.
It ensures that the web page objects are displayed correctly in the browser.
It handles the secure encryption of HTTP messages.

What is the purpose of the TCP 3-Way Handshake?

To facilitate the establishment of a TCP connection between client and server. (B) Signup and view all the answers

Which component of a web page is addressable by a Unified Resource Locator (URL)?

Objects, such as HTML files or JPEG images (D) Signup and view all the answers

What does a client request in the context of web pages and HTTP?

It requests and receives responses from web servers for web objects using the HTTP protocol. (C) Signup and view all the answers

In non-persistent HTTP connections, what is the total transmission time for sending an initial request for a web page object?

2 x RTT + transmission time (C) Signup and view all the answers

What is a disadvantage of non-persistent HTTP connections?

Higher network resource wastage (A) Signup and view all the answers

What is the disadvantage of persistent HTTP connections compared to non-persistent connections?

Higher CPU and memory usage (D) Signup and view all the answers

What is the advantage of non-persistent HTTP connections in terms of security?

Connection termination after data transfer (B) Signup and view all the answers

In pipelined persistent connection, how many Round Trip Times (RTTs) are required for sending all the objects?

1 RTT (D) Signup and view all the answers

What is the benefit of using persistent HTTP connections in modern browsers like Chrome and Firefox?

Lower CPU and memory usage (A) Signup and view all the answers

How does non-persistent HTTP connection affect network resources usage?

It increases network resource usage (C) Signup and view all the answers

What is the main difference between pipelined and non-pipelined persistent connection?

Round Trip Times (RTTs) required (A) Signup and view all the answers

What contributes to the greater CPU overhead in non-persistent HTTP connections?

Frequent TCP connection establishment (B) Signup and view all the answers

What is the main reason for using persistent HTTP connections in modern browsers?

Reduction in Round Trip Times (RTTs) (A) Signup and view all the answers