VERIFIED 2026/2027 DATA COMMUNICATIONS AND COMPUTER NETWORKS EXIT EXAM
QUESTION QUESTIONS WITH CORRECT ANSWERS
data communications and computer networks Exit Exam Question 05/04/2026
Understand the concepts and principles of data communications and computer networks.
1. Which of the following is NOT a key component of a computer network?
a) Nodes
b) Protocols
c) Modems
d) Routers
Answer: c) Modems
Explanation: While modems are often used in computer networks to establish connections
over telephone lines or cable lines, they are not considered a fundamental component of a
network. Nodes, protocols, and routers are essential components of a computer network.
2. Which layer of the OSI model is responsible for establishing, managing, and
terminating sessions between applications?
a) Physical layer
b) Data link layer
c) Session layer
d) Transport layer
Answer: c) Session layer
Explanation: The session layer of the OSI model is responsible for managing and terminating
sessions between applications. It establishes communication sessions, manages checkpoints, and
controls synchronization between communicating applications.
3. What is the primary function of a router in a computer network?
a) Transferring data within the same network segment
b) Connecting two or more separate networks
c) Filtering and forwarding network traffic
d) Establishing secure connections between devices
1
, VERIFIED 2026/2027 DATA COMMUNICATIONS AND COMPUTER NETWORKS EXIT EXAM
QUESTION QUESTIONS WITH CORRECT ANSWERS
data communications and computer networks Exit Exam Question 05/04/2026
Answer: b) Connecting two or more separate networks
Explanation: Routers are network devices that connect two or more separate networks, allowing
the exchange of data between them. They use routing tables and protocols to determine the best
path for forwarding data packets.
4. Which network topology connects all devices in a linear fashion?
a) Star
b) Bus
c) Mesh
d) Ring
Answer: b) Bus
Explanation: In a bus topology, all devices are connected to a single communication line,
forming a linear network. Data is transmitted along the line, and each device receives the
transmitted data, but only the intended recipient processes it.
5. Which technology allows multiple devices to share a single IP address?
a) DNS
b) DHCP
c) NAT
d) ARP
Answer: c) NAT (Network Address Translation)
Explanation: Network Address Translation (NAT) allows multiple devices on a private network
to share a single public IP address. It translates private IP addresses to the public IP address when
sending data over the internet and maintains a mapping table to route responses back to the correct
device.
2
QUESTION QUESTIONS WITH CORRECT ANSWERS
data communications and computer networks Exit Exam Question 05/04/2026
Understand the concepts and principles of data communications and computer networks.
1. Which of the following is NOT a key component of a computer network?
a) Nodes
b) Protocols
c) Modems
d) Routers
Answer: c) Modems
Explanation: While modems are often used in computer networks to establish connections
over telephone lines or cable lines, they are not considered a fundamental component of a
network. Nodes, protocols, and routers are essential components of a computer network.
2. Which layer of the OSI model is responsible for establishing, managing, and
terminating sessions between applications?
a) Physical layer
b) Data link layer
c) Session layer
d) Transport layer
Answer: c) Session layer
Explanation: The session layer of the OSI model is responsible for managing and terminating
sessions between applications. It establishes communication sessions, manages checkpoints, and
controls synchronization between communicating applications.
3. What is the primary function of a router in a computer network?
a) Transferring data within the same network segment
b) Connecting two or more separate networks
c) Filtering and forwarding network traffic
d) Establishing secure connections between devices
1
, VERIFIED 2026/2027 DATA COMMUNICATIONS AND COMPUTER NETWORKS EXIT EXAM
QUESTION QUESTIONS WITH CORRECT ANSWERS
data communications and computer networks Exit Exam Question 05/04/2026
Answer: b) Connecting two or more separate networks
Explanation: Routers are network devices that connect two or more separate networks, allowing
the exchange of data between them. They use routing tables and protocols to determine the best
path for forwarding data packets.
4. Which network topology connects all devices in a linear fashion?
a) Star
b) Bus
c) Mesh
d) Ring
Answer: b) Bus
Explanation: In a bus topology, all devices are connected to a single communication line,
forming a linear network. Data is transmitted along the line, and each device receives the
transmitted data, but only the intended recipient processes it.
5. Which technology allows multiple devices to share a single IP address?
a) DNS
b) DHCP
c) NAT
d) ARP
Answer: c) NAT (Network Address Translation)
Explanation: Network Address Translation (NAT) allows multiple devices on a private network
to share a single public IP address. It translates private IP addresses to the public IP address when
sending data over the internet and maintains a mapping table to route responses back to the correct
device.
2
