HTTP MCQ Quiz - Objective Question with Answer for HTTP - Download Free PDF

Which among the following is used for a secure website?

1. FTP
2. HTTPS
3. SMTP
4. More than one of the above
5. None of the above

Answer (Detailed Solution Below)

HTTP Question 1 Detailed Solution

The correct option is 2 i.e., ​HTTPS.

• ​HTTPS is used for a secure website.
• ​HTTPS stands for Hypertext Transfer Protocol Secure (HTTPS)
• ​HTTPS is an extension of the Hypertext Transfer Protocol (HTTP).
• It is used for secure communication over a computer network.
• SMTP stands for Simple Mail Transfer Protocol.
• SMTP is a communication protocol for electronic mail transmission.
• IMAP stands for Internet Message Access Protocol.
• FTP stands for File Transfer Protocol.

HTTP Question 2:

1. 80
2. 20/21
3. 25
4. More than one of the above
5. None of the above

Answer (Detailed Solution Below)

HTTP Question 2 Detailed Solution

The correct answer is option 1.

Concept:

Hypertext Transfer Protocol:

HTTP stands for Hypertext Transfer Protocol and is mostly used to access data on the internet, i.e. (WWW). HTTP primarily serves as a mix of FTP (File Transfer Protocol) and SMTP (Simple Mail Transfer Protocol) (Simple Mail Transfer Protocol).

• The HTTP protocol primarily makes use of TCP services on the well-known port 80.
• HTTP is a stateless protocol.
• HTTP is a protocol that is utilised at the Application Layer.
• HTTP is similar to SMTP because data flow between client and server appears just like SMTP messages. However, unlike SMTP, HTTP messages are not intended to be read by humans because they are read and interpreted by HTPP Client (browser) and HTTP server.

Hence the correct answer is 80.

HTTP Question 3:

1. One
2. Two
3. Three
4. More than one of the above
5. None of the above

Answer (Detailed Solution Below)

HTTP Question 3 Detailed Solution

The correct answer is Two

Key Points FTP (File Transfer Protocol) uses two TCP connections to maintain a clear separation of data commands and file data.

• Control Connection: This is used to send and receive commands between the client and the server. It's initiated by the client and remains open for the duration of the session.
• Data Connection: This connection is used specifically for data transfer. It is opened and closed as needed during the session. When an FTP client requests a file, a new data connection gets set up.

The reason for keeping these two connection types separate is to allow for clean, uninterrupted control commands while simultaneously allowing for the transmission of file data.

HTTP Question 4:

Answer (Detailed Solution Below)

HTTP Question 4 Detailed Solution

The correct answer is Two

Key Points FTP (File Transfer Protocol) uses two TCP connections to maintain a clear separation of data commands and file data.

• Control Connection: This is used to send and receive commands between the client and the server. It's initiated by the client and remains open for the duration of the session.
• Data Connection: This connection is used specifically for data transfer. It is opened and closed as needed during the session. When an FTP client requests a file, a new data connection gets set up.

The reason for keeping these two connection types separate is to allow for clean, uninterrupted control commands while simultaneously allowing for the transmission of file data.

HTTP Question 5:

Layer 4 firewall (device that can see all protocol headers up to the transport layer) cannot do which of the following?

1. Preventing all ICMP traffic
2. Stopping all HTTP traffic from 9pm to 5am
3. Do not allow traffic to come from an IP address but let it go to that address
4. Stopping any one user in TCP traffic from 9 pm to 5 am in multiuser system

Answer (Detailed Solution Below)

HTTP Question 5 Detailed Solution

The correct answer is Stopping all HTTP traffic from 9pm to 5am

Key Points

Layer 4 firewalls, also known as transport layer firewalls, operate up to the transport layer of the OSI (Open Systems Interconnection) model. They can filter traffic based on IP addresses, ports, and some protocol-specific features, but they do not have visibility into the contents of the traffic beyond this.

• Preventing all ICMP traffic:
  • ​This can be done by a Layer 4 firewall because ICMP is network layer protocol, which is part of the layers the firewall can see.
  • ​This can't be done accurately by a Layer 4 firewall. While it is true that HTTP traffic typically uses TCP and port 80 or 443 (which are aspects a Layer 4 firewall can see), the firewall doesn't know the contents of the communications and hence it can't discern between HTTP traffic and non-HTTP traffic that happens to be using the same ports. Further, timing-based rules (e.g., blocking certain traffic at certain times) can be typically applied at any layer, but accurately identifying HTTP traffic specifically needs visibility at Layer 7 (Application Layer).
  • This can be done by a Layer 4 firewall, as firewalls have the ability to filter traffic based on the source and destination IP addresses.
  • ​This would be hard or impossible to do with a Layer 4 firewall. User-level identification requires deep packet inspection (DPI) which is typically a feature of more advanced firewalls operating at the application layer (Layer 7). A layer 4 firewall typically can't distinguish traffic based on the user behind the communication.

  So, Layer 4 firewalls may not be able to perform tasks number 2 and 4 accurately. So correct answer both option 2 and 4.

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  Top HTTP MCQ Objective Questions

  HTTP Question 6

  A graphical HTML browser resident at a network client machine Q accesses a static HTML webpage from a HTTP server S. The static HTML page has exactly one static embedded image which is also at S. Assuming no caching, which one of the following is correct about the HTML webpage loading (including the embedded image)?

  1. Q needs to send at least 2 HTTP requests to S, each necessarily in a separate TCP connection to server S
  2. Q needs to send at least 2 HTTP requests to S, but a single TCP connection to server S is sufficient
  3. A single HTTP request from Q to S is sufficient, and a single TCP connection between Q and S is necessary for this
  4. A single HTTP request from Q to S is sufficient, and this is possible without any TCP connection between Q and S

  Answer (Detailed Solution Below)

  Option 2 : Q needs to send at least 2 HTTP requests to S, but a single TCP connection to server S is sufficient

  HTTP Question 6 Detailed Solution

  Explanation:

  • Q makes a TCP connection with S
  • First request for the webpage when this request is received by S
  • Second request to S for picking up that image so at least 2 HTTP request are needed.
  • Above two request are done using HTTP version 1.1 ( HTTP persistent connection )
  • HTTP Persistent connection can make several requests on the same server.
  • Here TCP may close the TCP connection.
  • So at least 2 HTTP request are enough and 1 TCP connection is sufficient for desired goal.

  
  Hence option 2 is the correct answer.

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  HTTP Question 7

  In one of the pairs of protocols given below, both the protocols can use multiple TCP connections between the same client and the server. Which one is that?

  1. HTTP, FTP
  2. HTTP, TELNET
  3. FTP, SMTP
  4. HTTP, SMTP

  Answer (Detailed Solution Below)

  Option 1 : HTTP, FTP

  HTTP Question 7 Detailed Solution

  HTTP: Multiple TCP connections can be used at client and server end.

  FTP: For FTP also multiple connections can be used at the same time.

  TELENT: Only one TCP connection is allowed at a time.

  SMTP: SMTP also allows only one TCP connection at a time.

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  HTTP Question 8

  Identify the correct order in which the following actions take place in an interaction between a web browser and a web server. 1. The web browser requests a webpage using HTTP. 2. The web browser establishes a TCP connection with the web server. 3. The web server sends the requested webpage using HTTP. 4. The web browser resolves the domain name using DNS.

  1. 4, 2, 1, 3
  2. 1, 2, 3, 4
  3. 4, 1, 2, 3
  4. 2, 4, 1, 3

  Answer (Detailed Solution Below)

  Option 1 : 4, 2, 1, 3

  HTTP Question 8 Detailed Solution

  The correct order in which the following actions take place in an interaction between a web browser and a web server

  Step 1:

  The web browser first needs to figure out IP address of site from URL using DNS. This is typically called domain name resolution.

  Step 2:

  TCP connection is established mostly at port 80.

  Step 3:

  Once the TCP connection is established, the browser sends an HTTP request using GET method.

  Step 4:

  Finally, web server responds with HTTP response that is, the page we requested.

  Hence, the correct sequence of actions is 4, 2, 1, 3

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  HTTP Question 9

  Which of the following is called as protocol in the http://www.google.co.in?

  Answer (Detailed Solution Below)

  Option 4 : http

  HTTP Question 9 Detailed Solution

  The correct answer is HyperText Transfer Protocol .

  

  Key Points

  • HTTP stands for HyperText Transfer Protocol .
  • The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems.
  • HTTP is the foundation of data communication for the World Wide Web , where hypertext documents include hyperlinks to other resources that the user can easily access, for example by a mouse click or by tapping the screen in a web browser.

  

  Important Points

  • Some important protocols :
    • SMTP - Simple Mail Transfer Protocol.
    • FTP - File Transfer Protocol.
    • TCP - Transmission Control Protocol
    • UDP - User Datagram Protocol
    • OSI - Open Systems Interconnection.

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    HTTP Question 10

    Assume that you have made a request for a web page through your web browser to a web server. Initially the browser cache is empty. Further, the browser is configured to send HTTP requests in non-persistent mode. The web page contains text and five very small images. The minimum number of TCP connections required to display the web page completely in your browser is _______.

    Answer (Detailed Solution Below) 6

    HTTP Question 10 Detailed Solution

    Concept: HTTP requests are of two types: persistent and non- persistent. In persistent mode, a single TCP connection is required for the entire HTTP session and all the objects fetched in that session. However, in the non- persistent mode, one TCP connection is required for each object to be fetched from the web server. Explanation: The web page contains text and 5 small images, that is, total 6 objects. Therefore, in non- persistent mode, 6 TCP connections would be required. Important point: If in the question, term ‘persistent’ was used instead of ‘non-persistent’, only 1 TCP connection would have been needed.

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    HTTP Question 11

    As per version 1.1 of HTTP, which of the following methods is incorrectly matched with its action?
    1. GET ­ Requests a document from the server
    2. CONNECT ­ Reserved
    3. PUT ­ Sends a document from server to client
    4. TRACE ­ Enquires about available options

    Answer (Detailed Solution Below)

    Option 4 : TRACE ­ Enquires about available options

    HTTP Question 11 Detailed Solution

    When a browser supporting HTTP 1.1 indicates it can decompress HTML files, a server will compress them for transport across the Internet, providing substantial aggregate savings in the amount of data that has to be transmitted.

    Statement 1) True:- The HTTP GET request method is used to request a resource from the server. The GET request should only receive data (the server must not change its state). If we want to change data on the server, use POST, PUT, PATCH, or DELETE methods.

    Statement 2):- True, In HTTP 1.1, all connections are considered persistent unless declared otherwise. The HTTP persistent connections do not use separate keepalive messages, they just allow multiple requests to use a single connection.

    Statement 3):- True, HTTP works as a request-response protocol between a client and server. Example: A client (browser) sends an HTTP request to the server; then the server returns a response to the client. The response contains status information about the request and may also contain the requested content.

    Statement 4) false:- The HTTP TRACE method performs a message loop-back test along the path to the target resource, providing a useful debugging mechanism.