WGU D413 - Telecomm and Wireless Communications |
Actual study Questions and Answers + Expert Rationales
| 2026/27 Updated | 100% correct
1. Which of the following best describes a network?
A) A single computer with multiple peripherals
B) An interconnected collection of computers and communication devices
C) A software program that manages data storage
D) A type of wireless communication protocol
Correct Answer: B) An interconnected collection of computers and communication devices
Expert Rationale: A network is fundamentally defined as an interconnected collection of
computers and communication devices that can share resources and information. This is the
foundational concept upon which all networking principles are built.
2. What is the primary disadvantage of networking?
A) Inability to share equipment
B) Increased personnel and cost requirements, plus vulnerabilities to cyberattacks
C) Limited data transmission speeds
D) Incompatibility with wireless devices
Correct Answer: B) Increased personnel and cost requirements, plus vulnerabilities to
cyberattacks
Expert Rationale: While networking offers significant advantages such as resource sharing, it
also introduces challenges including the need for specialized personnel, higher infrastructure
costs, and increased exposure to cybersecurity threats.
3. Which type of network is typically confined to a single building and managed by a single
entity?
A) WAN
B) MAN
C) LAN
D) PAN
Correct Answer: C) LAN
,Expert Rationale: A Local Area Network (LAN) is usually confined to a single building or campus
and is managed by a single organization. This makes it ideal for office buildings, schools, and
homes.
4. A network that spans multiple buildings within the same geographical location, such as a
college campus, is known as a:
A) LAN
B) CAN
C) MAN
D) WAN
Correct Answer: B) CAN
Expert Rationale: A Campus Area Network (CAN) is specifically designed to interconnect
multiple buildings within a limited geographical area, such as a university campus or corporate
park.
5. Which network topology connects each node to every other node in the network?
A) Star
B) Ring
C) Bus
D) Mesh
Correct Answer: D) Mesh
Expert Rationale: In a mesh topology, each node is connected directly to every other node,
providing multiple redundant paths. While this offers high fault tolerance, the number of
connections grows rapidly as nodes are added.
6. In which network topology are all devices connected to a single central cable or conductor?
A) Star
B) Ring
C) Bus
D) Mesh
Correct Answer: C) Bus
,Expert Rationale: A bus topology uses a single cable (the backbone) to connect all nodes. While
simple and cost-effective, a failure in the main cable can bring down the entire network.
7. What type of administration is typically used in a client/server network?
A) Decentralized
B) Distributed
C) Centralized
D) Peer-to-Peer
Correct Answer: C) Centralized
Expert Rationale: Client/server networks are characterized by centralized administration, where
a dedicated server manages resources, security, and user access, providing a more controlled
and scalable environment.
8. Which type of cloud computing service model provides a platform allowing customers to
develop, run, and manage applications?
A) IaaS
B) PaaS
C) SaaS
D) DaaS
Correct Answer: B) PaaS
Expert Rationale: Platform as a Service (PaaS) provides a cloud-based platform for developing,
running, and managing applications without the complexity of building and maintaining the
underlying infrastructure.
9. Which type of cloud is accessible only to a specific organization and is not available to the
general public?
A) Public cloud
B) Hybrid cloud
C) Community cloud
D) Private cloud
Correct Answer: D) Private cloud
, Expert Rationale: A private cloud is dedicated to a single organization, offering enhanced
security, control, and customization. It is not accessible to the general public.
10. Which of the following is an example of a Network Operating System (NOS)?
A) Windows 10
B) macOS
C) Windows Server 2016
D) iOS
Correct Answer: C) Windows Server 2016
Expert Rationale: A Network Operating System (NOS) is designed to provide communication
services between nodes on a network. Examples include Windows Server, Unix, and Linux,
which are built to manage network resources and users.
11. What is the primary function of a protocol in networking?
A) To convert electrical signals
B) To set rules that control communication between two nodes
C) To provide a physical connection point
D) To assign IP addresses
Correct Answer: B) To set rules that control communication between two nodes
Expert Rationale: A protocol is a set of rules and standards that govern how data is transmitted
and received over a network, ensuring that devices can communicate effectively.
12. A MAC address is a:
A) Logical address used to identify a node
B) Physical address used to identify a node
C) Software-based identifier
D) Temporary address assigned by a server
Correct Answer: B) Physical address used to identify a node
Expert Rationale: A Media Access Control (MAC) address is a unique physical address burned
into a network interface card (NIC) and is used for communication within a local network
segment.
Actual study Questions and Answers + Expert Rationales
| 2026/27 Updated | 100% correct
1. Which of the following best describes a network?
A) A single computer with multiple peripherals
B) An interconnected collection of computers and communication devices
C) A software program that manages data storage
D) A type of wireless communication protocol
Correct Answer: B) An interconnected collection of computers and communication devices
Expert Rationale: A network is fundamentally defined as an interconnected collection of
computers and communication devices that can share resources and information. This is the
foundational concept upon which all networking principles are built.
2. What is the primary disadvantage of networking?
A) Inability to share equipment
B) Increased personnel and cost requirements, plus vulnerabilities to cyberattacks
C) Limited data transmission speeds
D) Incompatibility with wireless devices
Correct Answer: B) Increased personnel and cost requirements, plus vulnerabilities to
cyberattacks
Expert Rationale: While networking offers significant advantages such as resource sharing, it
also introduces challenges including the need for specialized personnel, higher infrastructure
costs, and increased exposure to cybersecurity threats.
3. Which type of network is typically confined to a single building and managed by a single
entity?
A) WAN
B) MAN
C) LAN
D) PAN
Correct Answer: C) LAN
,Expert Rationale: A Local Area Network (LAN) is usually confined to a single building or campus
and is managed by a single organization. This makes it ideal for office buildings, schools, and
homes.
4. A network that spans multiple buildings within the same geographical location, such as a
college campus, is known as a:
A) LAN
B) CAN
C) MAN
D) WAN
Correct Answer: B) CAN
Expert Rationale: A Campus Area Network (CAN) is specifically designed to interconnect
multiple buildings within a limited geographical area, such as a university campus or corporate
park.
5. Which network topology connects each node to every other node in the network?
A) Star
B) Ring
C) Bus
D) Mesh
Correct Answer: D) Mesh
Expert Rationale: In a mesh topology, each node is connected directly to every other node,
providing multiple redundant paths. While this offers high fault tolerance, the number of
connections grows rapidly as nodes are added.
6. In which network topology are all devices connected to a single central cable or conductor?
A) Star
B) Ring
C) Bus
D) Mesh
Correct Answer: C) Bus
,Expert Rationale: A bus topology uses a single cable (the backbone) to connect all nodes. While
simple and cost-effective, a failure in the main cable can bring down the entire network.
7. What type of administration is typically used in a client/server network?
A) Decentralized
B) Distributed
C) Centralized
D) Peer-to-Peer
Correct Answer: C) Centralized
Expert Rationale: Client/server networks are characterized by centralized administration, where
a dedicated server manages resources, security, and user access, providing a more controlled
and scalable environment.
8. Which type of cloud computing service model provides a platform allowing customers to
develop, run, and manage applications?
A) IaaS
B) PaaS
C) SaaS
D) DaaS
Correct Answer: B) PaaS
Expert Rationale: Platform as a Service (PaaS) provides a cloud-based platform for developing,
running, and managing applications without the complexity of building and maintaining the
underlying infrastructure.
9. Which type of cloud is accessible only to a specific organization and is not available to the
general public?
A) Public cloud
B) Hybrid cloud
C) Community cloud
D) Private cloud
Correct Answer: D) Private cloud
, Expert Rationale: A private cloud is dedicated to a single organization, offering enhanced
security, control, and customization. It is not accessible to the general public.
10. Which of the following is an example of a Network Operating System (NOS)?
A) Windows 10
B) macOS
C) Windows Server 2016
D) iOS
Correct Answer: C) Windows Server 2016
Expert Rationale: A Network Operating System (NOS) is designed to provide communication
services between nodes on a network. Examples include Windows Server, Unix, and Linux,
which are built to manage network resources and users.
11. What is the primary function of a protocol in networking?
A) To convert electrical signals
B) To set rules that control communication between two nodes
C) To provide a physical connection point
D) To assign IP addresses
Correct Answer: B) To set rules that control communication between two nodes
Expert Rationale: A protocol is a set of rules and standards that govern how data is transmitted
and received over a network, ensuring that devices can communicate effectively.
12. A MAC address is a:
A) Logical address used to identify a node
B) Physical address used to identify a node
C) Software-based identifier
D) Temporary address assigned by a server
Correct Answer: B) Physical address used to identify a node
Expert Rationale: A Media Access Control (MAC) address is a unique physical address burned
into a network interface card (NIC) and is used for communication within a local network
segment.
