WGU C172 Post Assessment (Latest 2023/ 2024 Update) Network and Security Foundations| Questions and Verified Answers| 100% Correct| Grade A
WGU C172 Post Assessment (Latest 2023/
2024 Update) Network and Security
Foundations| Questions and Verified
Answers| 100% Correct| Grade A
Q: You want to secure WAPs of your company’s network from unauthorized access. Which of
the following is the most secure encryption method?
WPA2
WEP
WEP2
WPA
Answer:
WPA2
Q: A bridge is easy to install.
False
True
Answer:
True
Q: UDP uses acknowledgements.
False
True
Answer:
False
Q: A router resides at which layer of the OSI Model?
Layer 3
Layer 2
Layer 1
Layer 4
Answer:
Layer 3
Q: Which of the following is not an advantage of wireless networks?
No cables
Can simplify deployment to remote areas
Secure
Can be accessed from different locations
Answer:
Secure
Q: : What is the hexadecimal equivalent of 1011?
B
11
F
A
Answer:
B
Q: The port number for SMTP is . 23 21 53 80 25 Answer: 25 Q: The router’s routing tables allow the router to .
Keep track of network addresses
Keep track of MAC addresses
Keep track of the addresses needed to route data
Keep track of packets to forward data
Answer:
Keep track of the addresses needed to route data
Q: The personal __ software is typically based on basic packet filtering inspections.
Anti-Spyware
Antivirus Software
Signatures
Firewall
Answer:
Firewall
Q: Which of the following 802.11 technologies use the 2.4Ghz spectrum? (Choose all that
apply.)
802.11n
802.11a
802.11b
802.11g
Answer:
802.11n, 802.11b, 802.11g
Q: Which of the following are included in guidelines for wireless security? (Choose two.)
Use firewalls
Use 3rd party encryption software on the access point end only
Use any technology in the 2.4 GHz band
Turn on access point security features
Answer:
Use firewalls
Turn on access point security features
Q: Which of the following tools are needed to make a UTP cable? (Choose all that apply.)
Crimping tool
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Which layer of the OSI Model is layer 3?
A. Data Link
B. Physical
C. Presentation
D. Network
D. Network
Explanation: Layer 3 is the Network Layer that contains functionality such as routing, protocols such as IP, and devices such as routers.
Network media such as cables and connectors reside on the Data Link Layer of the OSI Model.
A. True
B. False
B. False
Explanation: The Physical Layer (layer 1) is where all cables and media are referenced in the OSI Model. The Data Link Layer is where devices such as Switches operate.
TCP and UDP reside at this layer of the OSI Model.
A. Layer 3
B. Layer 2
C. Layer 7
D. Layer 4
D. Layer 4
Explanation: Layer 4 of the OSI Model is the Transport Layer where TCP and UDP operate.
Which layer is the Data Link Layer of the OSI Model?
A. Layer 3
B. Layer 2
C. Layer 6
D. Layer 1
B. Layer 2
Explanation: The Data Link Layer is the layer just above the Physical Layer (layer 1). The Data Links Layer is layer 2 which contains the MAC and LLC sub-layers and is where switches and MAC addresses reside.
This layer of the OSI Model is a reference point for IP routing and routers.
A. Network
B. Data Link
C. Transport
D. Presentation
A. Network
Explanation: The Network Layer is layer 3 which references logical addressing and the protocols and devices (such as routers) that make it possible to route traffic from one network to another network.
What is the protocol data unit (PDU) at layer 2 of the OSI model?
A. Packet
B. Bits
C. Data
D. Frame
D. Frame
Explanation: Frames represent encapsulation (the packaging of information) at the Data Link layer. The Frame is the last form of encapsulation before the information is placed onto the physical medium as ones and zeros.
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What is the protocol data unit (PDU) at layer 3 of the OSI model?
A. Packet
B. Bits
C. Data
D. Segment
D. Frame
Explanation: Frames represent encapsulation (the packaging of information) at the Data Link layer. The Frame is the last form of encapsulation before the information is placed onto the physical medium as ones and zeros.
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What is the protocol data unit (PDU) at layer 4 of the OSI model?
A. Transport
B. Bits
C. Segment
D. Data
C. Segment
Explanation: When information arrives at the Transport Layer it includes port based information to define the protocol or application that the information is for. When information is referenced with a TCP port number it is called a Segment
What is the protocol data unit (PDU) at layer 1 of the OSI model?
A. Transport
B. Bits
C. Segment
D. Data
B. Bits
Explanation: When information is ready to be placed onto the wired or wireless transmission medium it is performed by signaling a series of ones and offs similar to a flashlight turning on and then off again in repetition. These ones and offs equate to ones and zeros in the world of computing and are called bits. This is the reason why we call the information bits when is it at the Physical Layer of the OSI Model (layer 1).
The protocol data unit for the top three layers of the OSI Model (layers 5 – 7) is the same.
A. True
B. False
A. True
Explanation: Layer 5 – 7 of the OSI Model are the Session Layer, Presentation Layer and
Application Layer respectively. These layers all have the same PDU which is simply called Data.
A Host computer works at which layer(s) of the OSI Model.
A. Layers 5-7
B. No layers
C. Layers 1-4
D. All layers
D. All layers
Explanation: Host computers run applications that access network resources. This is the entire
reason why we need networks in the first place – so that an application on a computer can send
data to an application on another computer. So, host computers work at the Application Layer
and process information all the way down the OSI model encapsulating the Data into Segments,
Packets, Frames, and then placing it onto the medium as bits via the network interface card.
The TCP/IP Model includes 7 layers.
A. True
B. False
B. False
Explanation: The TCP/IP Model has only 4 layers while the OSI Model has 7 layers
The TCP/IP Network Interface Layer (aka Link Layer) corresponds to the OSI Model Physical and
Data Link Layers.
A. True
B. False
A. True
Explanation: The layers of the TCP/IP Model correspond to certain layers of the OSI model. Since there are only 4 layers in the TCP/IP Model some of them will correspond to multiple layers of
the OSI Model. Layer 1 of TCP/IP corresponds to Layers 1 and 2 of the OSI Model. Layer 2 of the TCP/IP Model corresponds directly to Layer 3 of the OSI Model. Layer 3 of the TCP/IP Model corresponds directly to layer 4 of the OSI Model. Layer 4 of the TCP/IP Model corresponds to Layers 5 – 7 of the OSI Model.
The TCP/IP Model is a representation of the TCP/IP stack of protocols.
A. True
B. False
A. True
Explanation: The TCP/IP Model represents the TCP/IP stack of protocols that already exist.
Layer 2 of the TCP/IP Model is known as the __ Layer.
A. Network Interface
B. Application
C. Internet
D. Transport
C. Internet Layer
Explanation: The second layer of the TCP/IP Model is the Internet Layer which handles routing and the IP protocol
The TCP/IP Network Interface Layer is also known as the ____.
A. Network Layer
B. Link Layer
C. Application Layer
D. Transport Layer
B. Link Layer
Explanation: Layer 1 of the TCP/IP Model technically has two names. It can be called either the Network Interface Layer or the Link Layer.