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Prepare for the WGU D315 Network and Security – Foundations Pre-Assessment (Version B) with this comprehensive study guide featuring 160 practice questions, verified answers, and detailed explanations aligned with the latest course competencies. This resource covers networking fundamentals, the OSI and TCP/IP models, IPv4 and IPv6 addressing, routing and switching, wireless networking, firewalls, VPNs, cryptography, authentication, access control, risk management, malware prevention, incident response, and cybersecurity best practices. Updated for 2026–2027, this exam preparation guide is ideal for Western Governors University D315 students preparing for the pre-assessment, objective assessment, and foundational networking and security coursework.
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Which OSI layer is related to the function of the IP protocol suite? a. Transport b. Network c. Data Link d. Session - ✔✔ANSWER ✔✔-Network
Which OSI layer is responsible for organizing how bits are passed over the physical layer between devices within the same collision domain? a. Frame b. Connection c. Transport d. Data Link - ✔✔ANSWER ✔✔-Data Link Which OSI layer would define the scope of a protocol that makes sure packets of data are received correctly and resends them if they are not? a. Validation b. Transmission c. Transport d. Connection - ✔✔ANSWER ✔✔-Transport
Which Internet access technology uses ordinary telephone wires for data transmission? a. DSL b. Cable c. Wi-Fi d. Hotspot - ✔✔ANSWER ✔✔-DSL Which device is used to organize network cables as they run between switches and other network devices? a. Jack b. Hub c. Patch Panel d. Router - ✔✔ANSWER ✔✔-Patch Panel
Which network device is used to connect two or more network segments by performing OSI layer 3 functions like packet-forwarding? a. Router b. Repeater c. Wire d. Switch - ✔✔ANSWER ✔✔-Router Which network device is used to convert between digital information from a LAN and analog signals for transmission over a standard telephone wire? a. Repeater b. Modem c. Signal Generator d. Bit Stretcher - ✔✔ANSWER ✔✔-Modem
Which command produces the following output? Non-authoritative answer: Name: www.google.com Address: 172.217.11. a. dig b. nslookup d. whois d. nmap - ✔✔ANSWER ✔✔-nslookup Which command should be used to manually enter the default gateway for a computer? a. route b. ipconfig c. arp d. netstat - ✔✔ANSWER ✔✔-route
Which network diagnostic tool displays the path packets take between two endpoints? a. ifconfig b. traceroute c. ftp d. nslookup - ✔✔ANSWER ✔✔-traceroute Which network type is used to wire multiple PCs to a home router? a. LAN b. PAN c. MAN d. WAN - ✔✔ANSWER ✔✔-LAN
Which network topology is shown in the following diagram? a. Full mesh b. Star c. Bus d. Ring - ✔✔ANSWER ✔✔-Full Mesh Which network topology is being implemented when each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node? a. Star b. Full Mesh c. Ring d. Bus - ✔✔ANSWER ✔✔-Ring
In which physical LAN topology are nodes connected to each other with a backbone cable that loops around and ends at the same point it started? a. Ring b. Bus c. Star d. Tree - ✔✔ANSWER ✔✔-Ring Which OSI layer ensures error-free packets? a. Application b. Transport c. Session d. Presentation - ✔✔ANSWER ✔✔-Transport Which topology uses a switch or hub to connect to all devices in the same network?
a. Public b. Private c. Community d. Hybrid - ✔✔ANSWER ✔✔-Community Which type of software is used to provide virtualization? a. Database b. Hypervisor c. Antivirus d. Spreadsheet - ✔✔ANSWER ✔✔-Hypervisor A user that does not want to be identified while communicating on a network uses an application to alter the computer's identity. Which type of exploit is being perpetrated?
a. Denial-of-service b. ARP poisoning c. Smurf attack d. Spoofing - ✔✔ANSWER ✔✔-Spoofing An attacker attempts to misdirect traffic on a network back to the attacker by corrupting the network computer's cache of IP address to MAC address mappings that are cached. Which exploit is the attacker perpetrating? a. Port scanning b. Wiretapping c. Denial-of-service d. ARP poisoning - ✔✔ANSWER ✔✔-ARP poisoning
Which type of attack sends an email claiming to be from a reputable business in order to entice the recipient to provide sensitive information? a. Denial-of-service b. Phishing c. Password attacks d. Man-in-the-middle - ✔✔ANSWER ✔✔-Phishing A user on a network is planning to launch an exploit against a coworker in a neighboring department. The user needs to identify the IP address of a coworker in the desired department. Which tool or utility will allow the user to watch network traffic in real time to identify a target? a. Port scan b. Antivirus software
c. Sniffer d. Port redirection - ✔✔ANSWER ✔✔-Sniffer Which group of attackers is typically used for penetration testing? a. Red Team b. Blue Team c. White Team d. Gray Team - ✔✔ANSWER ✔✔-Red Team Which type of attack exploits an unpatched software vulnerability? a. Zero-day b. Brue-force c. Diffie-Hellman
Unfortunately, she does not install antivirus software on the cellular phone. What type of vulnerability is represented? a. Industry threat b. Misconfigured firewall rules c. Weak passwords d. BYOD/Mobile - ✔✔ANSWER ✔✔-BYOD/Mobile What is the definition of vulnerability, in computer security? a. It is a weakness which can be exploited by a threat, such as an attacker, to perform unauthorized actions within a computer system. b. It is a possible danger that might exploit a weakness to breach security and therefore cause possible harm.
c. It is an action taken by a threat that exploits a weakness that attempts to either block authorized access to an asset or to gain unauthorized access to an asset. d. It is the potential of a threat to exploit a weakness via an attack. - ✔✔ANSWER ✔✔-It is a weakness which can be exploited by a threat, such as an attacker, to perform unauthorized actions within a computer system. What is required to establish a secure connection to a remote network over an insecure link? a. Virtual Private Network (VPN) service b. Linux c. Command Line Interface d. TOR Network - ✔✔ANSWER ✔✔-Virtual Private Network (VPN) service
