TCP/IP Questions and Answers

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TCP/IP (Transmission Control Protocol/Internet Protocol) is the core communication suite of the internet. It is a common topic in programming interview questions with answers for networking roles at Cisco, Infosys, and TCS. TCP ensures reliable data transmission, while IP manages addressing and routing. Understanding layers, handshakes, and error control mechanisms is essential for both network engineers and developers. Practicing network programming and TCP/IP interview questions with answers sharpens your conceptual clarity and boosts your readiness for placement tests.

TCP/IP

Showing 10 of 19 questions

1. Which of the following services use TCP?     DHCP     SMTP     HTTP     TFTP     FTP

  • 1 and 2
  • 2, 3 and 5
  • 1, 2 and 4
  • 1, 3 and 4
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2. What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model?

  • Application
  • Host-to-Host
  • Internet
  • Network Access
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3. Which of the following describe the DHCP Discover message?     It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.     It uses UDP as the Transport layer protocol.     It uses TCP as the Transport layer protocol.     It does not use a layer 2 destination address.

  • 1 only
  • 1 and 2
  • 3 and 4
  • 4 only
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4. You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information. Which protocol will you use to accomplish this?

  • SMTP
  • SNMP
  • DHCP
  • ARP
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5. Which of the following is private IP address?

  • 12.0.0.1
  • 168.172.19.39
  • 172.15.14.36
  • 192.168.24.43
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6. Which of the following allows a router to respond to an ARP request that is intended for a remote host?

  • Gateway DP
  • Reverse ARP (RARP)
  • Proxy ARP
  • Inverse ARP (IARP)
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7. The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model?

  • Application
  • Host-to-Host
  • Internet
  • Network Access
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8. which of the following services use UDP?     DHCP     SMTP     SNMP     FTP     HTTP     TFTP

  • 1, 3 and 6
  • 2 and 4
  • 1, 2 and 4
  • All of the above
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9. Which class of IP address provides a maximum of only 254 host addresses per network ID?

  • Class A
  • Class B
  • Class C
  • Class D
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10. If you use either Telnet or FTP, which is the highest layer you are using to transmit data?

  • Application
  • Presentation
  • Session
  • Transport
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