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WGU Network-and-Security-Foundation Sample Questions (Q49-Q54):
NEW QUESTION # 49
Which layer of the TCP/IP model includes the Internet Protocol (IP)?
- A. Physical or network access
- B. Network or internet
- C. Transport
- D. Application
Answer: B
Explanation:
TheNetwork or Internet layerof the TCP/IP model is responsible for addressing, routing, and delivering packets across networks. TheInternet Protocol (IP)operates at this layer, ensuring thatdata is correctly routed from the source to the destination.
* Physical or network access layerdeals with hardware transmission (e.g., Ethernet, Wi-Fi).
* Application layerincludes end-user services (e.g., HTTP, FTP).
* Transport layermanages data flow using protocols like TCP and UDP but does not handle IP addressing.
NEW QUESTION # 50
A person is troubleshooting a network issue and needs to see a list of all active network connections.
Which Linux command should be used?
- A. dig
- B. ifconfig
- C. nslookup
- D. netstat
Answer: D
Explanation:
Thenetstatcommand in Linux displays active network connections, listening ports, and network statistics. It is useful for diagnosing network issues and identifying open connections.
* nslookupis for DNS queries.
* digprovides DNS information, not network connection status.
* ifconfigshows network interface details but does not list active connections.
NEW QUESTION # 51
An organization is evaluating its internal network. Currently, each device is connected to two adjacent devices, one on either side.
Which type of network topology is being used?
- A. Point-to-point
- B. Ring
- C. Bus
- D. Star
Answer: B
Explanation:
ARing topologyis a network setup where each device is connected to two adjacent devices, forming a circular path for data transmission. This topology ensures that data travels in a single orbidirectional loop.
* Point-to-pointtopology refers to a direct connection between two devices without forming a larger network structure.
* Bus topologyhas all devices connected to a single central cable, rather than forming a ring.
* Star topologyfeatures a central hub or switch that connects all devices, rather than direct device-to- device links.
NEW QUESTION # 52
Which layer of the OSI model includes HTTP?
- A. Session
- B. Application
- C. Network
- D. Transport
Answer: B
Explanation:
TheApplication layer(Layer 7 of the OSI model) includesHypertext Transfer Protocol (HTTP), which is used for web communication. This layer provides network services directly to applications and users.
* Network layerdeals with IP addressing and packet routing.
* Session layermanages connections but does not include HTTP.
* Transport layerensures reliable data transmission but does not handle application protocols.
NEW QUESTION # 53
What is the component of the CIA triad for IT security that requires that IP packets be retransmitted if the receiving host has an invalid checksum value?
- A. Consistency
- B. Integrity
- C. Availability
- D. Confidentiality
Answer: B
Explanation:
Integrityin theCIA (Confidentiality, Integrity, Availability) triadensures that data is not altered in an unauthorized manner. In networking, integrity mechanisms such as checksums, message authentication codes (MACs), and digital signatures verify that transmitted data has not been tampered with. If an IP packet has an invalid checksum, the system detects corruption and requests retransmission, ensuring data integrity.
* Confidentialityprotects against unauthorized access but does not ensure data consistency.
* Availabilityensures that resources are accessible but does not verify data correctness.
* Consistencyis not a formal component of the CIA triad.
NEW QUESTION # 54
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