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  1. What is the full form of TCP?
    a. Transmission Control Protocol
    b. Transfer Control Protocol
    c. Technology Control Protocol
    d. Transfer Communication Protocol
    Answer: a. Transmission Control Protocolindiabix+1
  2. How many layers are there in the TCP/IP model?
    a. 3
    b. 4
    c. 5
    d. 7
    Answer: b. 4testbook+1
  3. Which layer of the TCP/IP model is responsible for logical addressing?
    a. Application
    b. Transport
    c. Internet
    d. Network Access
    Answer: c. Internettestbook
  4. Which protocol works at the Transport layer of TCP/IP?
    a. HTTP
    b. TCP
    c. IP
    d. Ethernet
    Answer: b. TCPtestbook
  5. Which protocol is connection-oriented?
    a. UDP
    b. FTP
    c. TCP
    d. IP
    Answer: c. TCPtestbook
  6. Which protocol provides an unreliable communication service?
    a. TCP
    b. UDP
    c. FTP
    d. SMTP
    Answer: b. UDPtestbook
  7. What is the unit of data at the Transport layer in TCP/IP?
    a. Datagram
    b. Segment
    c. Frame
    d. Bit
    Answer: b. Segmenttestbook
  8. Which of the following uses port 80 by default?
    a. FTP
    b. SMTP
    c. HTTP
    d. SSH
    Answer: c. HTTPtestbook
  9. Which address format does IPv4 use?
    a. Hexadecimal
    b. Binary
    c. Dotted decimal
    d. Octal
    Answer: c. Dotted decimaltestbook
  10. Which layer of TCP/IP is responsible for routing packets?
    a. Application
    b. Transport
    c. Internet
    d. Network Access
    Answer: c. Internettestbook
  11. The full form of IP is:
    a. Internal Protocol
    b. Internet Protocol
    c. International Protocol
    d. Intermediate Protocol
    Answer: b. Internet Protocoltestbook
  12. The checksum field in a TCP header is used for:
    a. Encryption
    b. Error-checking
    c. Routing
    d. Flow control
    Answer: b. Error-checkingtestbook
  13. Which of the following is NOT a layer in the TCP/IP model?
    a. Network Access
    b. Internet
    c. Presentation
    d. Transport
    Answer: c. Presentationtestbook
  14. Which protocol is used to send emails?
    a. HTTP
    b. SMTP
    c. FTP
    d. SNMP
    Answer: b. SMTPindiabix
  15. Data is sent as a stream of ____ in TCP.
    a. Packets
    b. Bytes
    c. Bits
    d. Frames
    Answer: b. Bytestestbook
  16. Which protocol is commonly used for file transfers?
    a. Telnet
    b. FTP
    c. HTTP
    d. SSH
    Answer: b. FTPindiabix
  17. Which field in a TCP segment specifies the number of bytes the receiver is willing to receive?
    a. Sequence number
    b. Window
    c. Flag
    d. Options
    Answer: b. Windowtestbook
  18. The process of dividing large messages into smaller segments is called:
    a. Framing
    b. Encapsulation
    c. Segmentation
    d. Tunneling
    Answer: c. Segmentationtestbook
  19. DHCP provides:
    a. File transfer
    b. IP addressing
    c. Email
    d. Security
    Answer: b. IP addressingindiabix
  20. Which part of the TCP/IP model corresponds to the OSI Data Link and Physical layers?
    a. Application
    b. Internet
    c. Network Access
    d. Transport
    Answer: c. Network Accesstestbook
  21. Which protocol is used for secure remote access?
    a. DNS
    b. SSH
    c. SMTP
    d. DHCP
    Answer: b. SSHindiabix
  22. The default port for HTTPS is:
    a. 20
    b. 25
    c. 22
    d. 443
    Answer: d. 443testbook
  23. Which of the following is a connectionless protocol?
    a. TCP
    b. UDP
    c. SMTP
    d. POP3
    Answer: b. UDPtestbook
  24. The size of the source port field in a TCP header is:
    a. 8 bits
    b. 16 bits
    c. 32 bits
    d. 64 bits
    Answer: b. 16 bitstestbook
  25. Which protocol is primarily used for domain name resolution?
    a. FTP
    b. DNS
    c. SMTP
    d. ARP
    Answer: b. DNSindiabix
  26. Which technique does TCP use to establish a connection?
    a. Three-way handshake
    b. Four-way handshake
    c. Two-way handshake
    d. Five-way handshake
    Answer: a. Three-way handshaketestbook
  27. Which layer of TCP/IP ensures end-to-end delivery of packets?
    a. Application
    b. Internet
    c. Transport
    d. Network Access
    Answer: c. Transporttestbook
  28. What is the default port for FTP control?
    a. 23
    b. 21
    c. 20
    d. 22
    Answer: b. 21indiabix
  29. What does ARP stand for?
    a. Address Routing Protocol
    b. Address Resolution Protocol
    c. Advanced Routing Protocol
    d. Automatic Routing Protocol
    Answer: b. Address Resolution Protocolindiabix
  30. Which protocol translates domain names into IP addresses?
    a. DHCP
    b. DNS
    c. FTP
    d. TCP
    Answer: b. DNSindiabix
  31. Which field in TCP header is 32 bits long?
    a. Source port
    b. Sequence number
    c. Flags
    d. Window
    Answer: b. Sequence numbertestbook
  32. UDP does NOT provide:
    a. Connection establishment
    b. Checksumming
    c. Multicasting
    d. Error detection
    Answer: a. Connection establishmenttestbook
  33. Which protocol uses SYN and ACK flags?
    a. UDP
    b. IP
    c. TCP
    d. FTP
    Answer: c. TCPtestbook
  34. The main transport protocols in the Internet are:
    a. IP and ICMP
    b. TCP and UDP
    c. FTP and SMTP
    d. HTTP and DNS
    Answer: b. TCP and UDPtestbook
  35. Which of the following is NOT true about UDP?
    a. It is connectionless
    b. It provides error recovery
    c. It has low overhead
    d. It is used for DNS and streaming
    Answer: b. It provides error recoverytestbook
  36. The main purpose of DHCP is to:
    a. Discover MAC address
    b. Assign IP addresses
    c. Provide encrypted communication
    d. Route packets
    Answer: b. Assign IP addressesindiabix
  37. The maximum size of a TCP header without options is:
    a. 16 bytes
    b. 20 bytes
    c. 24 bytes
    d. 32 bytes
    Answer: b. 20 bytestestbook
  38. Which protocol is used for web browsing?
    a. SMTP
    b. FTP
    c. HTTP
    d. POP3
    Answer: c. HTTPindiabix
  39. The internet protocol that operates at the Internet layer is:
    a. UDP
    b. ICMP
    c. IPv4
    d. Telnet
    Answer: c. IPv4testbook
  40. A SYN flood attack targets:
    a. DNS
    b. FTP
    c. TCP handshake
    d. UDP broadcast
    Answer: c. TCP handshaketestbook
  41. Which timer in TCP handles zero-window size situations?
    a. Retransmission
    b. Keep-alive
    c. Persist
    d. SYN
    Answer: c. Persisttestbook
  42. The default port for SMTP is:
    a. 80
    b. 23
    c. 25
    d. 110
    Answer: c. 25indiabix
  43. Which field identifies the receiver’s process in TCP?
    a. Source IP
    b. Destination port
    c. Flag
    d. Sequence number
    Answer: b. Destination porttestbook
  44. Connectionless communication is best provided by:
    a. TCP
    b. UDP
    c. SMTP
    d. FTP
    Answer: b. UDPtestbook
  45. What is fragmentation in Networking?
    a. Dividing data into smaller parts
    b. Encrypting data
    c. Compressing data
    d. Multiplexing
    Answer: a. Dividing data into smaller partstestbook
  46. In TCP, retransmission is triggered by:
    a. Timeout
    b. Window size
    c. Acknowledgement
    d. None of the above
    Answer: a. Timeouttestbook
  47. What is the purpose of the ACK flag in TCP?
    a. To synchronize
    b. To acknowledge receipt
    c. To terminate connection
    d. To control congestion
    Answer: b. To acknowledge receipttestbook
  48. Which device operates at the Data-Link layer of OSI?
    a. Router
    b. Bridge
    c. Switch
    d. Repeater
    Answer: b. Bridgetestbook
  49. The maximum segment size (MSS) option in TCP specifies:
    a. Buffer size
    b. Maximum data field size
    c. Header length
    d. Sliding window size
    Answer: b. Maximum data field sizetestbook
  50. Which attack establishes numerous half-open TCP connections?
    a. Flooding
    b. Smurf
    c. SYN flooding
    d. Ping of death
    Answer: c. SYN floodingtestbook

 

  1. https://www.indiabix.com/networking/tcp-ip/
  2. https://testbook.com/objective-questions/mcq-on-tcp–5eea6a0939140f30f369d8fc

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