TCP/IP & Networking Exam 2026/2027: 110
OSI Model Questions, IPv6, SD-WAN, Cloud
Computing & Troubleshooting with Answers
Description:
Master networking fundamentals with 110 exam questions covering TCP/IP, OSI layers,
IPv6, routing protocols, network security, SD-WAN, and cloud models. Updated for
2026/2027 academic standards. Includes detailed answers and explanations.
Download the complete examination paper to ace your certification or university assessment today.
, Networking Exam 2026-2027: TCP/IP, OSI, Troubleshooting
Section A: TCP/IP Model and Protocols
1. Which layer of the TCP/IP model is responsible for end-to-end transport of data and includes
protocols such as TCP and UDP?
A. Application Layer
B. Transport Layer
C. Network Layer
D. Network Interface Layer
Answer: B
Explanation: The Transport Layer in the TCP/IP model handles end-to-end communication,
segmentation, reassembly, and uses TCP for reliable delivery and UDP for faster, connectionless
transmission.
2. A network administrator needs to securely manage a remote server. Which protocol operating
at the Application Layer of the TCP/IP model should they use?
A. HTTP
B. NTP
C. SSH
D. ARP
Answer: C
Explanation: Secure Shell (SSH) provides encrypted remote management and is part of the
Application Layer. HTTP is unencrypted, NTP is for time synchronization, and ARP operates at
the Network Interface Layer.
,3. Which statement accurately describes the role of the Network Interface Layer in the TCP/IP
model?
A. It defines logical addressing and routing paths.
B. It establishes how data should be physically sent through the network.
C. It ensures reliable delivery of segments between applications.
D. It translates data formats and encrypts communications.
Answer: B
Explanation: The Network Interface Layer (also called Link Layer) specifies the physical
transmission of data over network media, including framing, MAC addressing, and hardware
interfaces.
Section B: OSI Model Layers
4. The OSI model was developed by which organization and for what primary purpose?
A. IEEE; to replace the TCP/IP model entirely
B. International Standards Organization (ISO); to provide greater granularity of networking
assignments
C. IETF; to standardize wireless communications
D. ANSI; to define physical cabling standards only
Answer: B
Explanation: The ISO developed the OSI model after TCP/IP to offer more detailed layering
(seven layers) for better understanding and standardization of network functions.
5. At which OSI layer do devices such as routers operate, making forwarding decisions based on
logical network addresses?
A. Physical Layer
B. Data Link Layer
C. Network Layer
D. Transport Layer
, Answer: C
Explanation: The Network Layer (Layer 3) handles logical addressing (IP addresses) and
routing. Routers operate at this layer to forward packets between networks.
6. Which OSI layer is responsible for establishing, maintaining, and authenticating connections
between applications on different hosts?
A. Presentation Layer
B. Session Layer
C. Transport Layer
D. Application Layer
Answer: B
Explanation: The Session Layer (Layer 5) manages dialogue control, session establishment,
maintenance, synchronization, and authentication.
7. A web browser encrypts data before sending it over the internet. At which OSI layer does this
encryption typically occur?
A. Application Layer
B. Presentation Layer
C. Session Layer
D. Transport Layer
Answer: B
Explanation: The Presentation Layer (Layer 6) is responsible for data translation, compression,
and encryption/decryption to ensure data is in a usable format for the Application Layer.
8. Which OSI layer is often referred to as the "heart of OSI" because it segments and reassembles
data while ensuring reliable delivery?
A. Network Layer
B. Data Link Layer
C. Transport Layer
D. Session Layer
OSI Model Questions, IPv6, SD-WAN, Cloud
Computing & Troubleshooting with Answers
Description:
Master networking fundamentals with 110 exam questions covering TCP/IP, OSI layers,
IPv6, routing protocols, network security, SD-WAN, and cloud models. Updated for
2026/2027 academic standards. Includes detailed answers and explanations.
Download the complete examination paper to ace your certification or university assessment today.
, Networking Exam 2026-2027: TCP/IP, OSI, Troubleshooting
Section A: TCP/IP Model and Protocols
1. Which layer of the TCP/IP model is responsible for end-to-end transport of data and includes
protocols such as TCP and UDP?
A. Application Layer
B. Transport Layer
C. Network Layer
D. Network Interface Layer
Answer: B
Explanation: The Transport Layer in the TCP/IP model handles end-to-end communication,
segmentation, reassembly, and uses TCP for reliable delivery and UDP for faster, connectionless
transmission.
2. A network administrator needs to securely manage a remote server. Which protocol operating
at the Application Layer of the TCP/IP model should they use?
A. HTTP
B. NTP
C. SSH
D. ARP
Answer: C
Explanation: Secure Shell (SSH) provides encrypted remote management and is part of the
Application Layer. HTTP is unencrypted, NTP is for time synchronization, and ARP operates at
the Network Interface Layer.
,3. Which statement accurately describes the role of the Network Interface Layer in the TCP/IP
model?
A. It defines logical addressing and routing paths.
B. It establishes how data should be physically sent through the network.
C. It ensures reliable delivery of segments between applications.
D. It translates data formats and encrypts communications.
Answer: B
Explanation: The Network Interface Layer (also called Link Layer) specifies the physical
transmission of data over network media, including framing, MAC addressing, and hardware
interfaces.
Section B: OSI Model Layers
4. The OSI model was developed by which organization and for what primary purpose?
A. IEEE; to replace the TCP/IP model entirely
B. International Standards Organization (ISO); to provide greater granularity of networking
assignments
C. IETF; to standardize wireless communications
D. ANSI; to define physical cabling standards only
Answer: B
Explanation: The ISO developed the OSI model after TCP/IP to offer more detailed layering
(seven layers) for better understanding and standardization of network functions.
5. At which OSI layer do devices such as routers operate, making forwarding decisions based on
logical network addresses?
A. Physical Layer
B. Data Link Layer
C. Network Layer
D. Transport Layer
, Answer: C
Explanation: The Network Layer (Layer 3) handles logical addressing (IP addresses) and
routing. Routers operate at this layer to forward packets between networks.
6. Which OSI layer is responsible for establishing, maintaining, and authenticating connections
between applications on different hosts?
A. Presentation Layer
B. Session Layer
C. Transport Layer
D. Application Layer
Answer: B
Explanation: The Session Layer (Layer 5) manages dialogue control, session establishment,
maintenance, synchronization, and authentication.
7. A web browser encrypts data before sending it over the internet. At which OSI layer does this
encryption typically occur?
A. Application Layer
B. Presentation Layer
C. Session Layer
D. Transport Layer
Answer: B
Explanation: The Presentation Layer (Layer 6) is responsible for data translation, compression,
and encryption/decryption to ensure data is in a usable format for the Application Layer.
8. Which OSI layer is often referred to as the "heart of OSI" because it segments and reassembles
data while ensuring reliable delivery?
A. Network Layer
B. Data Link Layer
C. Transport Layer
D. Session Layer
