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gate questions

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gate questions

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  1. Packets of the same session may be routed through different paths in: TCP, but not UDP TCP and UDP UDP, but not TCP Neither TCP nor UDP

  2. Correct answer:2ExplanationPacket is the Network layer Protocol Data Unit (PDU). TCP and UDP are Transport layer protocols. Packets of same session may be routed through different routes. Most networks don’t use static routing, but use some form of adaptive routing where the paths used to route two packets for same session may be different due to congestion on some link, or some other reason.

  3. 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)? [GATE CSE 2014] Q needs to send at least 2 HTTP requests to S, each necessarily in a separate TCP connection to server S Q needs to send at least 2 HTTP requests to S, but a single TCP connection to server S is sufficient A single HTTP request from Q to S is sufficient, and a single TCP connection between Q and S is necessary for this A single HTTP request from Q to S is sufficient, and this is possible without any TCP connection between Q and S

  4. Correct answer:2ExplanationWhenever a browser opens a webpage, it makes a separate request for each object of page like image, css, javascript, etc. However if multiple resources are served from same server, then one TCP connect is sufficient.

  5. Which of the following transport layer protocols is used to support electronic mail? [GATE CSE 2015] SMTP IP TCP UDP

  6. Correct answer:1ExplanationE-mail uses SMTP(Simple Mail Transfer Protocol) as an application layer protocol. SMTP uses TCP as a transport layer protocol.

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