A user starts browsing a webpage hosted at a remote server. The browser opens a single TCP connection to fetch the entire webpage from the server. The webpage consists of a top-level index page with multiple embedded image objects. Assume that all caches (e.g., DNS cache, browser cache) are all initially empty. The following packets leave the user's computer in some order. (i) HTTP GET request for the index page (ii) DNS request to resolve the web server's name to its IP address (iii) HTTP GET request for an image object (iv) TCP SYN to open a connection to the web server Which one of the following is the CORRECT chronological order (earliest in time to latest) of the packets leaving the computer?

Single correct

Source: GATE CSE 2024 Set 1 (CS1), IISc Bengaluru. Official question paper.

GATE CSE 2022 | Question 35

Application Layer

NAT1 mark

Consider the resolution of the domain name www.gate.org.in by a DNS resolver. Assume that no resource records are cached anywhere across the DNS servers and that iterative query mechanism is used in the resolution. The number of DNS query-response pairs involved in completely resolving the domain name is __________

Numerical answer

Your answer

Answer key coming soon

Source: GATE CSE 2022, IIT Kharagpur. Official question paper.

GATE CSE 2020 | Question 25

Application Layer·Transport Layer

NAT1 mark

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 _________.

Numerical answer

Your answer

Answer key coming soon

Source: GATE CSE 2020, IIT Delhi. Official question paper.

GATE CSE 2019 | Question 16

Application Layer

MCQ1 mark

Which of the following protocol pairs can be used to send and retrieve e-mails (in that order)?

Single correct

Source: GATE CSE 2019, IIT Madras. Official question paper and answer key.

GATE CSE 2016 | Set 1 | Question 24

Application Layer

MCQ1 mark

Which one of the following protocols is NOT used to resolve one form of address to another one?

Single correct

Answer key coming soon

Source: GATE CSE 2016 Set 1, IISc Bengaluru. Official question paper.

GATE CSE 2016 | Set 1 | Question 25

Application Layer

MCQ1 mark

Which of the following is/are example(s) of stateful application layer protocols? (i) HTTP (ii) FTP (iii) TCP (iv) POP3

Single correct

Answer key coming soon

Source: GATE CSE 2016 Set 1, IISc Bengaluru. Official question paper.

GATE CSE 2016 | Set 2 | Question 25

Application Layer

MCQ1 mark

Identify the correct sequence in which the following packets are transmitted on the network by a host when a browser requests a webpage from a remote server, assuming that the host has just been restarted.

Single correct

Answer key coming soon

Source: GATE CSE 2016 Set 2, IISc Bengaluru. Official question paper.

GATE CSE 2015 | Set 1 | Question 27

Application Layer

MCQ1 mark

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?

Single correct

Source: GATE CSE 2015 Set 1, IIT Kanpur. Official question paper and answer key.

GATE CSE 2015 | Set 2 | Question 35

Application Layer

MCQ1 mark

Which one of the following statements is NOT correct about HTTP cookies?

Single correct

Source: GATE CSE 2015 Set 2, IIT Kanpur. Official question paper and answer key.

GATE CSE 2014 | Set 1 | Question 25

Application Layer

MCQ1 mark

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.

Single correct

Source: GATE CSE 2014 Set 1, IIT Kharagpur. Official question paper and answer key.

GATE CSE 2013 | Question 12

Transport Layer·Application Layer

MCQ1 mark

The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are

Single correct

Answer key coming soon

Source: GATE CSE 2013, IIT Bombay. Official question paper (booklet code A).

GATE CSE 2012 | Question 22

Transport Layer·Application Layer

MCQ1 mark

Which of the following transport layer protocols is used to support electronic mail?

Single correct

Answer key coming soon

Source: GATE CSE 2012. Official question paper (booklet code A).

GATE CSE 2011 | Question 4

Application Layer

MCQ1 mark

Consider different activities related to email. m1: Send an email from a mail client to a mail server m2: Download an email from mailbox server to a mail client m3: Checking email in a web browser Which is the application level protocol used in each activity?

Single correct

Answer key coming soon

Source: GATE CSE 2011, IIT Madras. Official question paper.

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