WGU D684 - Intro to Computer Science
Exam UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
IoT Device - CORRECT ANSWER A computer that enables smart functionality in everyday
objects such as thermostats, lights, and appliances.
What is a Repeater in networking? - CORRECT ANSWER A device that receives a signal,
amplifies it, and then retransmits it to extend the range of the network.
What does LAN stand for? - CORRECT ANSWER local-area network
What is a Ring Topology Network? - CORRECT ANSWER -A network setup where devices
are connected in a circular or ring-like fashion, with each device connecting to exactly two others.
Downsides:
-If one device or cable fails, the entire network can be disrupted.
-Data needs to pass through multiple nodes to reach its destination making it slower than star
networks.
-Not suited for large networks.
What is a Star Topology Network? - CORRECT ANSWER -A network setup where each
device connects to a central hub or switch. The central hub acts as a conduit for all data transmission.
The resulting structure resembles a star with a hub at the center.
-EX. A home Wi-Fi network where all devices connect to a central wireless router.
-Easy troubleshooting and only the hub is affected when a device fails instead of the entire network.
What is a Bus Topology Network? - CORRECT ANSWER -A network setup where all devices
are connected to a single cable known as a "bus" or "backbone". Data is transmitted along this cable
and is received by all connected devices, although only the intended recipient will process it.
Downsides:
-When the main cable is damaged the entire network will go down.
, -Potential for exposing sensitive information due to the broadcast to all devices.
-Data collision if multiple devices try to send data simultaneously
What does WAN stand for? - CORRECT ANSWER wide area network, made up of LANs
connected over long distances
What does MAN Stand for? - CORRECT ANSWER Metropolitan Area Network.
Communications network covering a
city or a suburb. Many cellphone systems are MANs.
What does the latency of a network do? - CORRECT ANSWER Measures the delay before
data begins to transfer after an instruction for its transfer is given.
-Ex. Lagging in an online game. Actions take time to register on the server and will be reflected on
your screen.
What is a High-level network application protocol? - CORRECT ANSWER Defines rules for
how applications communicate with each other over a network.
Ex.
-HTTP (Hypertext Transfer Protocol)
-FTP (File Transfer Protocol)
-Telnet -used for remote terminal connections
-SSH (Secure Shell)
-NFS (network File system)
-DNS (Domain name system)
-SMTP (Simple Mail Transfer Protocol)
Arithmetic/logic Unit (ALU) - CORRECT ANSWER is capable of performing basic arithmetic
operations such as adding, subtracting, multiplying, and dividing two numbers. Also able to perform
operations such as AND, OR, and NOT.
What two special registers make up the control unit and what do they do? - CORRECT ANSWER
Instruction register - contains the instruction that is being executed
Exam UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
IoT Device - CORRECT ANSWER A computer that enables smart functionality in everyday
objects such as thermostats, lights, and appliances.
What is a Repeater in networking? - CORRECT ANSWER A device that receives a signal,
amplifies it, and then retransmits it to extend the range of the network.
What does LAN stand for? - CORRECT ANSWER local-area network
What is a Ring Topology Network? - CORRECT ANSWER -A network setup where devices
are connected in a circular or ring-like fashion, with each device connecting to exactly two others.
Downsides:
-If one device or cable fails, the entire network can be disrupted.
-Data needs to pass through multiple nodes to reach its destination making it slower than star
networks.
-Not suited for large networks.
What is a Star Topology Network? - CORRECT ANSWER -A network setup where each
device connects to a central hub or switch. The central hub acts as a conduit for all data transmission.
The resulting structure resembles a star with a hub at the center.
-EX. A home Wi-Fi network where all devices connect to a central wireless router.
-Easy troubleshooting and only the hub is affected when a device fails instead of the entire network.
What is a Bus Topology Network? - CORRECT ANSWER -A network setup where all devices
are connected to a single cable known as a "bus" or "backbone". Data is transmitted along this cable
and is received by all connected devices, although only the intended recipient will process it.
Downsides:
-When the main cable is damaged the entire network will go down.
, -Potential for exposing sensitive information due to the broadcast to all devices.
-Data collision if multiple devices try to send data simultaneously
What does WAN stand for? - CORRECT ANSWER wide area network, made up of LANs
connected over long distances
What does MAN Stand for? - CORRECT ANSWER Metropolitan Area Network.
Communications network covering a
city or a suburb. Many cellphone systems are MANs.
What does the latency of a network do? - CORRECT ANSWER Measures the delay before
data begins to transfer after an instruction for its transfer is given.
-Ex. Lagging in an online game. Actions take time to register on the server and will be reflected on
your screen.
What is a High-level network application protocol? - CORRECT ANSWER Defines rules for
how applications communicate with each other over a network.
Ex.
-HTTP (Hypertext Transfer Protocol)
-FTP (File Transfer Protocol)
-Telnet -used for remote terminal connections
-SSH (Secure Shell)
-NFS (network File system)
-DNS (Domain name system)
-SMTP (Simple Mail Transfer Protocol)
Arithmetic/logic Unit (ALU) - CORRECT ANSWER is capable of performing basic arithmetic
operations such as adding, subtracting, multiplying, and dividing two numbers. Also able to perform
operations such as AND, OR, and NOT.
What two special registers make up the control unit and what do they do? - CORRECT ANSWER
Instruction register - contains the instruction that is being executed
