WGU D315 COMPREHENSIVE STUDY GUIDE
2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ Network Typology bus.
Answer: All devices connect to a central main line
◍ What is SSL.
Answer: Secure Sockets Layer encryption with an asymmetric key.
Formerly used in https, but now replaced by TSL
◍ OSI layer 1.
Answer: Physical Layer (Cable, Hubs, Repeaters)
◍ Bus Topology.
Answer: Network in which all devices receive all messages transmitted by a
central trunk cable
◍ Separation of Privilege.
Answer: security principle that requires multiple conditions or keys for
access to sensitive operations
◍ White Hat Hacker.
Answer: An ethical hacker who tests systems with permission
◍ Buffer Overflow.
Answer: entering too much info into the form which causes the app to crash
or other damage
◍ What is the highest WLAN security protocol commonly used.
Answer: WAP2 encrypted with AES (WAP3 was released in 2018 but not
yet widely adapted).
◍ What is TSL.
, Answer: Transport layer security, an asymmetric key that replaced SSL.
used in https
◍ Economy of Mechanism.
Answer: Security principle that says systems should be as simple as possible
◍ WPA3 (WiFi Protected Access 3).
Answer: Latest Wi-Fi security protocol designed to fix the weakness of
previous standards like WEP, WPA, and WPA2
◍ 100m long Cat 5 cable supports speeds up to.
Answer: 100 Mb/s
◍ SQL Injection.
Answer: Injecting malicious SQL code into an input field
◍ OSI layer 4.
Answer: Transport Layer (TCP, end to end connection)
◍ Firewall that only checks the address label.
Answer: Packet Filter
◍ Type 1 Hypervisor.
Answer: Runs directly on the physical hardware
◍ Virus.
Answer: Software that can replicate itself. Can't be controlled remotely.
Main goal is to modify information
◍ complete mediation.
Answer: security principle stating that every access to every resource must
be checked for permission, every time
◍ Least Common Mechanism.
Answer: security principle recommending that different parts of a system
should share as few mechanisms are possible
◍ Red Team.
Answer: The offensive security team
, ◍ Phishing.
Answer: A social engineering attack using fake messages to steal
information.
◍ Packet Filtering Firewall.
Answer: A limit is placed on the packets that can enter the network.
Compares traffic against pre-established criteria.
◍ Which OSI layer is related to the IP protocol.
Answer: Network 3
◍ Blue Team.
Answer: The defensive security team
◍ Hybrid Topology.
Answer: Network that combines elements of multiple topologies to meet
scalability and redundancy requirements
◍ California Consumer Privacy Act (CCPA).
Answer: Protects personal data of California residents
◍ Ad-hoc.
Answer: In ad-hoc mode, all wireless communication is performed in a
peer-to-peer fashion and does not require or involve a WAP.
◍ How do we protect the application level with a firewall.
Answer: With a proxy server, Middle man or Layer 7 firewall
◍ On what OSI level is a Packet Filter operating.
Answer: Transport (checks TCP/UDP prot numbers) and Network (checks
source and destination IP)
◍ Telnet.
Answer: Tests connectivity to a specific port. Used to test if a port is open
and debugging services.
◍ OSI layer 2.
Answer: Data Link Layer (Frame, Switch, PPP, Ethernet)
2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ Network Typology bus.
Answer: All devices connect to a central main line
◍ What is SSL.
Answer: Secure Sockets Layer encryption with an asymmetric key.
Formerly used in https, but now replaced by TSL
◍ OSI layer 1.
Answer: Physical Layer (Cable, Hubs, Repeaters)
◍ Bus Topology.
Answer: Network in which all devices receive all messages transmitted by a
central trunk cable
◍ Separation of Privilege.
Answer: security principle that requires multiple conditions or keys for
access to sensitive operations
◍ White Hat Hacker.
Answer: An ethical hacker who tests systems with permission
◍ Buffer Overflow.
Answer: entering too much info into the form which causes the app to crash
or other damage
◍ What is the highest WLAN security protocol commonly used.
Answer: WAP2 encrypted with AES (WAP3 was released in 2018 but not
yet widely adapted).
◍ What is TSL.
, Answer: Transport layer security, an asymmetric key that replaced SSL.
used in https
◍ Economy of Mechanism.
Answer: Security principle that says systems should be as simple as possible
◍ WPA3 (WiFi Protected Access 3).
Answer: Latest Wi-Fi security protocol designed to fix the weakness of
previous standards like WEP, WPA, and WPA2
◍ 100m long Cat 5 cable supports speeds up to.
Answer: 100 Mb/s
◍ SQL Injection.
Answer: Injecting malicious SQL code into an input field
◍ OSI layer 4.
Answer: Transport Layer (TCP, end to end connection)
◍ Firewall that only checks the address label.
Answer: Packet Filter
◍ Type 1 Hypervisor.
Answer: Runs directly on the physical hardware
◍ Virus.
Answer: Software that can replicate itself. Can't be controlled remotely.
Main goal is to modify information
◍ complete mediation.
Answer: security principle stating that every access to every resource must
be checked for permission, every time
◍ Least Common Mechanism.
Answer: security principle recommending that different parts of a system
should share as few mechanisms are possible
◍ Red Team.
Answer: The offensive security team
, ◍ Phishing.
Answer: A social engineering attack using fake messages to steal
information.
◍ Packet Filtering Firewall.
Answer: A limit is placed on the packets that can enter the network.
Compares traffic against pre-established criteria.
◍ Which OSI layer is related to the IP protocol.
Answer: Network 3
◍ Blue Team.
Answer: The defensive security team
◍ Hybrid Topology.
Answer: Network that combines elements of multiple topologies to meet
scalability and redundancy requirements
◍ California Consumer Privacy Act (CCPA).
Answer: Protects personal data of California residents
◍ Ad-hoc.
Answer: In ad-hoc mode, all wireless communication is performed in a
peer-to-peer fashion and does not require or involve a WAP.
◍ How do we protect the application level with a firewall.
Answer: With a proxy server, Middle man or Layer 7 firewall
◍ On what OSI level is a Packet Filter operating.
Answer: Transport (checks TCP/UDP prot numbers) and Network (checks
source and destination IP)
◍ Telnet.
Answer: Tests connectivity to a specific port. Used to test if a port is open
and debugging services.
◍ OSI layer 2.
Answer: Data Link Layer (Frame, Switch, PPP, Ethernet)
