Questions & Answers of Application Layer Protocols (DNS, SMTP, POP, FTP, HTTP)

Weightage of Application Layer Protocols (DNS, SMTP, POP, FTP, HTTP)

Total 9 Questions have been asked from Application Layer Protocols (DNS, SMTP, POP, FTP, HTTP) topic of Computer Networks subject in previous GATE papers. Average marks 1.11.

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.

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?

Consider the following three statements about link state and distance vector routing protocols, for a large network with 500 network nodes and 4000 links.
[S1] The computational overhead in link state protocols is higher than in distance vector protocols.
[S2] A distance vector protocol (with split horizon) avoids persistent routing loops, but not a link state protocol.
[S3] After a topology change, a link state protocol will converge faster than a distance vector protocol.

Which one of the following is correct about S1, S2, and S3 ?

Which of the following is TRUE about the interior gateway routing protocols - Routing Information Protocol(RIP) and Open Shortest Path First(OSPF)?

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)?

In the following pairs of OSI protocol layer/sub-layer and its functionality, the INCORRECT pair is

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

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?

Which one of the following uses UDP as the transport protocol?