TCP/IP Questions with Answers | Page 2

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.

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Q11

Which of the following is the decimal and hexadecimal equivalents of the binary number 10011101?

A 155, 0x9B
B 157, 0x9D
C 159, 0x9F
D 185, 0xB9

Answer: Option B

Q12

Which statements are true regarding ICMP packets?     They acknowledge receipt of a TCP segment.     They guarantee datagram delivery.     They can provide hosts with information about network problems.     They are encapsulated within IP datagrams.

A 1 only
B 2 and 3
C 3 and 4
D 2, 3 and 4

Answer: Option C

Q13

Which of the following are layers in the TCP/IP model?     Application     Session     Transport     Internet     Data Link     Physical

A 1 and 2
B 1, 3 and 4
C 2, 3 and 5
D 3, 4 and 5

Answer: Option B

Q14

Which layer 4 protocol is used for a Telnet connection?

A IP
B TCP
C TCP/IP
D UDP

Answer: Option B

Q15

Which statements are true regarding ICMP packets?     ICMP guarantees datagram delivery.     ICMP can provide hosts with information about network problems.     ICMP is encapsulated within IP datagrams.     ICMP is encapsulated within UDP datagrams.

A 1 only
B 2 and 3
C 1 and 4
D All of the above

Answer: Option B

Q16

Which of the following are TCP/IP protocols used at the Application layer of the OSI model?  IP     TCP     Telnet     FTP     TFTP

A 1 and 3
B 1, 3 and 5
C 3, 4 and 5
D All of the above

Answer: Option C

Q17

What protocol is used to find the hardware address of a local device?

A RARP
B ARP
C IP
D ICMP

Answer: Option B

Q18

Which of the following protocols uses both TCP and UDP?

A FTP
B SMTP
C Telnet
D DNS

Answer: Option D

Q19

What is the address range of a Class B network address in binary?

A 01xxxxxx
B 0xxxxxxx
C 10xxxxxx
D 110xxxxx

Answer: Option C

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