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TCP/IP Model – MCQs

1.
How many layers does the TCP/IP model have?
4 layers
7 layers
5 layers
6 layers
TCP/IP model has 4 layers: Application, Transport, Internet, and Network Access.
2.
Which TCP/IP layer combines the OSI's session, presentation, and application layers?
Application Layer
Transport Layer
Internet Layer
Network Access Layer
The TCP/IP Application Layer handles the functionality of OSI's layers 5–7.
3.
TCP/IP is primarily used for:
Real-world network communication
Theoretical teaching only
Only LAN connections
None of the above
TCP/IP is the standard framework for Internet and network communications.
4.
Which OSI model layer does TCP/IP's Internet Layer correspond to?
Network Layer
Transport Layer
Application Layer
Data Link Layer
The Internet Layer corresponds to OSI's Network Layer, handling addressing and routing.
5.
Which layer in TCP/IP handles end-to-end communication between applications?
Transport Layer
Internet Layer
Network Access Layer
Physical Layer
Transport Layer provides process-to-process delivery using TCP or UDP.
6.
Which model is mainly used for teaching and understanding network concepts?
OSI model
TCP/IP model
Internet model
Physical model
OSI is a theoretical model designed for educational purposes.
7.
Which protocol is the main standard for logical addressing in the TCP/IP model?
IP
TCP
UDP
FTP
IP assigns logical addresses and routes packets in networks.
8.
TCP/IP was designed based on:
Standard protocols like TCP and IP
OSI only
Ethernet only
IPv6 exclusively
TCP/IP is built on widely-used standard protocols for real networks.
9.
Which TCP/IP layer is responsible for delivering packets to the correct host?
Internet Layer
Transport Layer
Application Layer
Network Access Layer
The Internet Layer uses IP addresses to deliver data to the correct host.
10.
Which TCP/IP layer interfaces directly with applications like HTTP, FTP, and SMTP?
Application Layer
Transport Layer
Internet Layer
Network Access Layer
The Application Layer provides services directly to user applications.
1.
TCP is which type of protocol?
Connection-oriented
Connectionless
Best-effort
None of the above
TCP establishes a connection and ensures reliable delivery of data.
2.
Which protocol provides unreliable, fast, connectionless communication?
UDP
TCP
IP
ICMP
UDP is connectionless and does not guarantee delivery, making it faster than TCP.
3.
Which TCP/IP model layer is responsible for addressing and routing?
Internet Layer
Transport Layer
Application Layer
Network Access Layer
The Internet Layer (IP) handles logical addressing and routing.
4.
Which protocol is used to establish a connection in TCP?
3-way handshake (SYN, SYN-ACK, ACK)
ARP
DNS
ICMP Echo
TCP uses a 3-way handshake to establish a reliable connection.
5.
Which port number range is considered well-known?
0-1023
1024-49151
49152-65535
65536-70000
Well-known ports (0–1023) are reserved for standard services.
6.
Which protocol is used for reliable delivery of email?
SMTP over TCP
UDP
DHCP
ICMP
Email protocols like SMTP rely on TCP for reliable delivery.
7.
Which TCP feature ensures data is received in correct order?
Sequencing
Checksum
Broadcast
Multicast
TCP assigns sequence numbers to segments for proper ordering.
8.
Which of the following is a function of the IP protocol?
Logical addressing and routing
Flow control
Error-free delivery
Port number assignment
IP provides logical addressing and determines the best path for packets.
9.
Which TCP feature prevents receiver overload?
Flow control
Sequencing
Checksum
Addressing
TCP flow control manages the data rate to prevent buffer overflow at the receiver.
10.
Which protocol provides fast, connectionless transmission for DNS queries?
UDP
TCP
ICMP
ARP
DNS primarily uses UDP for faster query resolution.
11.
What does TCP use to detect transmission errors?
Checksum
TTL
MAC address
Subnet mask
TCP includes a checksum to detect errors in transmitted segments.
12.
Which TCP/IP layer is responsible for host-to-host communication?
Transport Layer
Internet Layer
Network Access Layer
Application Layer
The Transport Layer (TCP/UDP) provides end-to-end communication between hosts.
13.
TCP ensures data reliability using:
Acknowledgments (ACK) and retransmissions
Port numbers only
Routing tables
MAC addresses
TCP retransmits lost segments and uses ACKs to confirm delivery.
14.
Which TCP/IP layer uses port numbers to identify applications?
Transport Layer
Internet Layer
Network Access Layer
Application Layer
Port numbers at the Transport Layer identify processes/applications for communication.
15.
Which TCP/IP protocol assigns logical addresses to hosts?
IP
TCP
UDP
ARP
IP assigns unique logical addresses to identify hosts across networks.

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