Computer Networking and Security Exam
Questions 2026/2027 | 115 Practice
Questions with Answers for CCNA,
CompTIA Network+ & Security+
Certification
Description:
Master networking concepts with our comprehensive 2026/2027 exam paper covering OSI
model, cloud computing, wireless security, cryptography, and network protocols. 115
multiple-choice questions with detailed explanations. Ideal for university students,
certification candidates, and IT professionals.
Download now and ace your networking exam!
, Networking & Security Exam 2026/2027 - 115 Questions with
Answers
Section A: Network Fundamentals and OSI Model
Question 1
Which OSI layer is primarily responsible for logical addressing and packet forwarding?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Application Layer
Answer: B. Network Layer
Explanation: The Network Layer (Layer 3) handles logical addressing through IP addresses
and determines the optimal path for packet forwarding across interconnected networks.
Question 2
At which OSI layer does the Media Access Control (MAC) address operate to regulate access
to the physical transmission medium?
A. Physical Layer
B. Network Layer
C. Data Link Layer
D. Transport Layer
Answer: C. Data Link Layer
Explanation: The Data Link Layer (Layer 2) manages how devices within the same collision
domain share the physical medium through MAC addressing and frame delivery.
Question 3
Which OSI layer is responsible for reliable data delivery, error recovery, and flow control
mechanisms?
A. Application Layer
B. Session Layer
,C. Transport Layer
D. Network Layer
Answer: C. Transport Layer
Explanation: The Transport Layer (Layer 4) ensures complete and correct data delivery
through error checking, retransmission of lost packets, and flow control mechanisms.
Question 4
The Transmission Control Protocol (TCP) operates at which OSI layer?
A. Layer 3
B. Layer 4
C. Layer 5
D. Layer 7
Answer: B. Layer 4
Explanation: TCP functions at the Transport Layer (Layer 4), providing connection-oriented,
reliable data delivery through sequencing, acknowledgments, and retransmission.
Section B: Network Hardware and Media
Question 5
Which Ethernet cable category maintains 10 Gbps transmission speeds for the full 100-meter
maximum cable length?
A. CAT 5e
B. CAT 6
C. CAT 6a
D. CAT 7
Answer: C. CAT 6a
Explanation: CAT 6a cabling is specifically designed to support 10 Gbps Ethernet
transmission up to the full 100-meter channel length with improved shielding and higher
frequency specifications.
, Question 6
Which networking device organizes and terminates cable runs while providing flexible
connectivity between switches and network devices?
A. Router
B. Switch
C. Patch panel
D. Hub
Answer: C. Patch panel
Explanation: A patch panel serves as a central termination point for structured cabling,
allowing administrators to manage and reconfigure connections between network devices.
Question 7
Which Ethernet standard employs UTP cabling and the CSMA/CD access method to regulate
device transmissions on the network?
A. Token Ring
B. FDDI
C. Ethernet
D. ATM
Answer: C. Ethernet
Explanation: Ethernet uses Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) to manage access to the shared medium through listening and back-off
algorithms.
Question 8
Which hardware component enables network communication at both the physical and data
link layers through its unique MAC address assignment?
A. NIC (Network Interface Card)
B. Router
C. Switch
D. Gateway
Answer: A. NIC (Network Interface Card)
Questions 2026/2027 | 115 Practice
Questions with Answers for CCNA,
CompTIA Network+ & Security+
Certification
Description:
Master networking concepts with our comprehensive 2026/2027 exam paper covering OSI
model, cloud computing, wireless security, cryptography, and network protocols. 115
multiple-choice questions with detailed explanations. Ideal for university students,
certification candidates, and IT professionals.
Download now and ace your networking exam!
, Networking & Security Exam 2026/2027 - 115 Questions with
Answers
Section A: Network Fundamentals and OSI Model
Question 1
Which OSI layer is primarily responsible for logical addressing and packet forwarding?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Application Layer
Answer: B. Network Layer
Explanation: The Network Layer (Layer 3) handles logical addressing through IP addresses
and determines the optimal path for packet forwarding across interconnected networks.
Question 2
At which OSI layer does the Media Access Control (MAC) address operate to regulate access
to the physical transmission medium?
A. Physical Layer
B. Network Layer
C. Data Link Layer
D. Transport Layer
Answer: C. Data Link Layer
Explanation: The Data Link Layer (Layer 2) manages how devices within the same collision
domain share the physical medium through MAC addressing and frame delivery.
Question 3
Which OSI layer is responsible for reliable data delivery, error recovery, and flow control
mechanisms?
A. Application Layer
B. Session Layer
,C. Transport Layer
D. Network Layer
Answer: C. Transport Layer
Explanation: The Transport Layer (Layer 4) ensures complete and correct data delivery
through error checking, retransmission of lost packets, and flow control mechanisms.
Question 4
The Transmission Control Protocol (TCP) operates at which OSI layer?
A. Layer 3
B. Layer 4
C. Layer 5
D. Layer 7
Answer: B. Layer 4
Explanation: TCP functions at the Transport Layer (Layer 4), providing connection-oriented,
reliable data delivery through sequencing, acknowledgments, and retransmission.
Section B: Network Hardware and Media
Question 5
Which Ethernet cable category maintains 10 Gbps transmission speeds for the full 100-meter
maximum cable length?
A. CAT 5e
B. CAT 6
C. CAT 6a
D. CAT 7
Answer: C. CAT 6a
Explanation: CAT 6a cabling is specifically designed to support 10 Gbps Ethernet
transmission up to the full 100-meter channel length with improved shielding and higher
frequency specifications.
, Question 6
Which networking device organizes and terminates cable runs while providing flexible
connectivity between switches and network devices?
A. Router
B. Switch
C. Patch panel
D. Hub
Answer: C. Patch panel
Explanation: A patch panel serves as a central termination point for structured cabling,
allowing administrators to manage and reconfigure connections between network devices.
Question 7
Which Ethernet standard employs UTP cabling and the CSMA/CD access method to regulate
device transmissions on the network?
A. Token Ring
B. FDDI
C. Ethernet
D. ATM
Answer: C. Ethernet
Explanation: Ethernet uses Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) to manage access to the shared medium through listening and back-off
algorithms.
Question 8
Which hardware component enables network communication at both the physical and data
link layers through its unique MAC address assignment?
A. NIC (Network Interface Card)
B. Router
C. Switch
D. Gateway
Answer: A. NIC (Network Interface Card)
