Q#1: Which of the following is a network reference model?
(A) OSI Model
(B) TCP/IP Model
(C) Both A and B
(D) None of the above
Answer: (C) Both A and B
Q#2: How many layers are in the OSI model?
(A) 5
(B) 6
(C) 7
(D) 8
Answer: (C) 7
Q#3: Which OSI layer is responsible for end-to-end delivery of data?
(A) Transport
(B) Network
(C) Data Link
(D) Physical
Answer: (A) Transport
Q#4: Which OSI layer provides logical addressing?
(A) Physical
(B) Data Link
(C) Network
(D) Session
Answer: (C) Network
Q#5: Which OSI layer is responsible for error detection and correction?
(A) Transport
(B) Data Link
(C) Network
(D) Application
Answer: (A) Transport
Q#6: Which OSI layer deals with physical transmission of bits?
(A) Transport
(B) Network
(C) Data Link
(D) Physical
Answer: (D) Physical
Q#7: Which OSI layer ensures reliable delivery of packets?
(A) Network
(B) Transport
(C) Data Link
(D) Session
Answer: (B) Transport
Q#8: The Application layer in OSI model provides:
(A) Routing
(B) User interface for applications
(C) Physical signal transmission
(D) Error detection
Answer: (B) User interface for applications
Q#9: The Session layer provides:
(A) Encryption and decryption
(B) Managing sessions between applications
(C) Flow control
(D) Logical addressing
Answer: (B) Managing sessions between applications
Q#10: The Presentation layer is responsible for:
(A) Data translation, encryption, and compression
(B) Packet switching
(C) Physical transmission
(D) Error detection
Answer: (A) Data translation, encryption, and compression
Q#11: TCP/IP model has how many layers?
(A) 4
(B) 5
(C) 6
(D) 7
Answer: (A) 4
Q#12: Which layer of TCP/IP corresponds to the OSI Application, Presentation, and Session layers?
(A) Application
(B) Transport
(C) Internet
(D) Network Interface
Answer: (A) Application
Q#13: The Transport layer in TCP/IP provides:
(A) Logical addressing
(B) End-to-end delivery
(C) Physical signal
(D) Media access control
Answer: (B) End-to-end delivery
Q#14: The Internet layer in TCP/IP corresponds to which OSI layer?
(A) Network
(B) Data Link
(C) Transport
(D) Physical
Answer: (A) Network
Q#15: Which layer of TCP/IP corresponds to OSI Physical + Data Link layers?
(A) Network Interface
(B) Transport
(C) Application
(D) Session
Answer: (A) Network Interface
Q#16: OSI model was developed by:
(A) ISO
(B) IEEE
(C) ITU-T
(D) IETF
Answer: (A) ISO
Q#17: TCP/IP model was developed by:
(A) ISO
(B) DARPA
(C) IEEE
(D) ITU-T
Answer: (B) DARPA
Q#18: Which OSI layer handles flow control?
(A) Data Link
(B) Transport
(C) Network
(D) Application
Answer: (B) Transport
Q#19: Which OSI layer performs routing of packets?
(A) Physical
(B) Data Link
(C) Network
(D) Transport
Answer: (C) Network
Q#20: Encapsulation is the process of:
(A) Adding headers at each layer
(B) Removing headers at each layer
(C) Sending raw bits
(D) Error checking
Answer: (A) Adding headers at each layer
Q#21: De-encapsulation is:
(A) Adding headers
(B) Removing headers
(C) Modulating signals
(D) Multiplexing
Answer: (B) Removing headers
Q#22: Protocols operate at which layer?
(A) All layers
(B) Only Application
(C) Only Network
(D) Only Data Link
Answer: (A) All layers
Q#23: HTTP operates at which OSI layer?
(A) Application
(B) Transport
(C) Network
(D) Presentation
Answer: (A) Application
Q#24: FTP is used for:
(A) Sending emails
(B) File transfer
(C) Web browsing
(D) Routing
Answer: (B) File transfer
Q#25: SMTP operates at which layer?
(A) Transport
(B) Application
(C) Network
(D) Data Link
Answer: (B) Application
Q#26: UDP is:
(A) Connection-oriented
(B) Connectionless
(C) Reliable
(D) Error-correcting
Answer: (B) Connectionless
Q#27: TCP is:
(A) Connection-oriented
(B) Connectionless
(C) Unreliable
(D) Layer 1 protocol
Answer: (A) Connection-oriented
Q#28: Which of the following is a connection-oriented protocol?
(A) TCP
(B) UDP
(C) IP
(D) ICMP
Answer: (A) TCP
Q#29: Which of the following is connectionless?
(A) TCP
(B) UDP
(C) FTP
(D) Telnet
Answer: (B) UDP
Q#30: ICMP operates at which OSI layer?
(A) Network
(B) Transport
(C) Data Link
(D) Application
Answer: (A) Network
Q#31: ARP operates at which OSI layer?
(A) Network
(B) Data Link
(C) Physical
(D) Transport
Answer: (B) Data Link
Q#32: The OSI model helps in:
(A) Standardizing network protocols
(B) Reducing network costs
(C) Encrypting data
(D) Storing data
Answer: (A) Standardizing network protocols
Q#33: TCP/IP model is also called:
(A) DoD model
(B) OSI model
(C) ISO model
(D) IEEE model
Answer: (A) DoD model
Q#34: Which layer is responsible for data formatting and encryption in OSI?
(A) Presentation
(B) Session
(C) Transport
(D) Network
Answer: (A) Presentation
Q#35: Which layer establishes, maintains, and terminates sessions?
(A) Session
(B) Transport
(C) Network
(D) Application
Answer: (A) Session
Q#36: Logical addresses are used at which OSI layer?
(A) Network
(B) Transport
(C) Data Link
(D) Physical
Answer: (A) Network
Q#37: Physical addresses (MAC addresses) are used at which OSI layer?
(A) Data Link
(B) Network
(C) Transport
(D) Physical
Answer: (A) Data Link
Q#38: Segmentation occurs at which OSI layer?
(A) Transport
(B) Network
(C) Data Link
(D) Physical
Answer: (A) Transport
Q#39: Routing occurs at which layer?
(A) Network
(B) Transport
(C) Data Link
(D) Application
Answer: (A) Network
Q#40: TCP/IP Application layer supports:
(A) FTP, HTTP, SMTP
(B) IP, ICMP
(C) Ethernet, Wi-Fi
(D) UDP, TCP
Answer: (A) FTP, HTTP, SMTP
Q#41: TCP/IP Internet layer supports:
(A) IP, ICMP, ARP
(B) HTTP, FTP
(C) TCP, UDP
(D) DNS only
Answer: (A) IP, ICMP, ARP
Q#42: Transport layer of TCP/IP includes:
(A) TCP, UDP
(B) HTTP, FTP
(C) IP, ICMP
(D) Ethernet
Answer: (A) TCP, UDP
Q#43: Network Interface layer of TCP/IP includes:
(A) Physical and Data Link
(B) Transport
(C) Application
(D) Internet
Answer: (A) Physical and Data Link
Q#44: Encapsulation adds:
(A) Headers and sometimes trailers
(B) Only data
(C) Physical addresses only
(D) Encryption only
Answer: (A) Headers and sometimes trailers
Q#45: In TCP/IP, end-to-end delivery is managed by:
(A) Transport layer
(B) Network layer
(C) Data Link layer
(D) Physical layer
Answer: (A) Transport layer
Q#46: In OSI, segmentation and reassembly is done at:
(A) Transport layer
(B) Network layer
(C) Data Link layer
(D) Physical layer
Answer: (A) Transport layer
Q#47: Which OSI layer ensures data integrity?
(A) Transport
(B) Network
(C) Physical
(D) Application
Answer: (A) Transport
Q#48: Multiplexing is handled at which OSI layer?
(A) Physical
(B) Data Link
(C) Transport
(D) Network
Answer: (C) Transport
Q#49: De-multiplexing occurs at:
(A) Transport layer
(B) Network layer
(C) Data Link layer
(D) Physical layer
Answer: (A) Transport layer
Q#50: Which model is widely used in Internet communications today?
(A) TCP/IP
(B) OSI
(C) IEEE
(D) None of the above
Answer: (A) TCP/IP