WGU D488 Practice Exam PDF – Database Management & Information Systems Study Guide with Answers & Rationales [2026–2027]

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WGU D488 (NEW UPDATED VERSION) LATEST ACTUAL EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED QUESTIONS AND ANSWERS) | GUARANTEED PASS
A+ [2026-2027]

802.11 standards - CORRECT ANSWER IEEE standards for wireless networking
based on spread spectrum radio transmission in the 2.4 GHz and 5 GHz bands.



QUESTION :802.11h - CORRECT ANSWER Amendment to Wi-Fi standards that
defines a Dynamic Frequency Selection (DFS) mechanism to avoid interference with radar
and cellular communications in the 5 GHz frequency band.



QUESTION :802.1p - CORRECT ANSWER IEEE standard defining a 3-bit (0 to 7)
class of service priority field within the 802.1Q format.



QUESTION :802.1q - CORRECT ANSWER The 802.1Q protocol is often used to tag
frames destined for different VLANs across trunk links.



QUESTION :802.1x - CORRECT ANSWER Standard for encapsulating EAP
communications over a LAN (EAPOL) to implement port-based authentication.



QUESTION :802.3 ethernet standards - CORRECT ANSWER Standards developed
as the IEEE 802.3 series describing media types, access methods, data rates, and distance
limitations at OSI layers 1 and 2 using xBASE-y designations.



QUESTION :access control list (ACL) - CORRECT ANSWER The collection of
access control entries (ACEs) that determines which subjects (user accounts, host IP
addresses, and so on) are allowed or denied access to the object and the privileges given
(read-only, read/write, and so on).




2026 2027 GRADED A+

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QUESTION :access point (AP) - CORRECT ANSWER A device that provides a
connection between wireless devices and can connect to wired networks, implementing an
infrastructure mode WLAN.



QUESTION :access/edge layer - CORRECT ANSWER Lowest tier in a hierarchical
network topology acting as the attachment point for end systems.



QUESTION :active-active - CORRECT ANSWER High availability cluster
configuration where all nodes are utilized continually.



QUESTION :active-passive - CORRECT ANSWER High availability cluster
configuration where one or more nodes are only utilized during failover.



QUESTION :ad hoc network - CORRECT ANSWER Type of wireless network
where connected devices communicate directly with each other instead of over an
established medium.



QUESTION :address resolution protocol (ARP) - CORRECT ANSWER Broadcast
mechanism by which the hardware MAC address of an interface is matched to an IP
address on a local network segment.



QUESTION :addressing - CORRECT ANSWER Unique identifier for a network
node, such as a MAC address, IPv4 address, or IPv6 address.



QUESTION :adjacent channel interference (ACI) - CORRECT ANSWER
Troubleshooting issue where access points within range of one another are configured to
use different but overlapping channels, causing increased noise.




2026 2027 GRADED A+

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QUESTION :administrative distance (AD) - CORRECT ANSWER Metric
determining the trustworthiness of routes derived from different routing protocols.



QUESTION :administratively down - CORRECT ANSWER Switch or router port
that has been purposefully disabled via the management interface.



QUESTION :advanced persistent threat (APT) - CORRECT ANSWER Threat
actors with the ability to craft novel exploits and techniques to obtain, maintain, and
diversify unauthorized access to network systems over a long period.



QUESTION :angled physical contact (APC) - CORRECT ANSWER Fiber optic
connector finishing type that uses an angled polish for the ferrule.



QUESTION :antenna type - CORRECT ANSWER Specially arranged metal wires
that can send and receive radio signals, typically implemented as either an omnidirectional
or a unidirectional type.



QUESTION :anycast - CORRECT ANSWER IP delivery mechanism whereby a
packet is addressed to a single host from a group sharing the same address.



QUESTION :application layer (Layer 7) - CORRECT ANSWER OSI model layer
providing support to applications requiring network services (file transfer, printing, email,
databases, and so on).



QUESTION :application programming interface (API) - CORRECT ANSWER
Methods exposed by a script, program, or web application that allow other scripts or apps
to interact with it.




2026 2027 GRADED A+

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QUESTION :arp command - CORRECT ANSWER Utility to display and modify
contents of host's cache of IP to MAC address mappings, as resolved by address resolution
protocol (ARP) replies.



QUESTION :Network-based attack - CORRECT ANSWER An attack where an
attacker with access to the target local network segment redirects an IP address to the
MAC address of a computer that is not the intended recipient.



QUESTION :Attenuation - CORRECT ANSWER Degradation of a signal as it
travels over media, determining the maximum distance for a particular media type at a
given bit rate.



QUESTION :IPSec - CORRECT ANSWER A protocol that provides authentication
for the origin of transmitted data as well as integrity and protection against replay attacks.



QUESTION :Primary DNS server - CORRECT ANSWER A DNS server designated
by a name server record for the domain that holds a complete copy of zone records.



QUESTION :Link local address - CORRECT ANSWER An address used by
Windows hosts configured to obtain an address automatically that cannot contact a DHCP
server, reverting to the range 169.254.x.y.



QUESTION :Automation - CORRECT ANSWER Using scripts and APIs to
provision and deprovision systems without manual intervention.



QUESTION :Routing boundaries - CORRECT ANSWER A group of network
prefixes under the administrative control of a single organization.




2026 2027 GRADED A+