Wgu D315 Certification Study Guide 2026 Breakthrough Questions And Detailed Correct Answers Graded A+

WGU D315 CERTIFICATION STUDY GUIDE
2026 BREAKTHROUGH QUESTIONS AND
DETAILED CORRECT ANSWERS GRADED
A+

⩥ Which OSI layer is organizing the bits over the physical layer
between devices in the same collision domain? Answer: Data Link 2 -
They are in the same Frame


⩥ Which OSI layer is a Switch at? Answer: Data Link 2


⩥ Which OSI layer is a WAP (Wireless Access Point) at? Answer: Data
Link 2


⩥ Which OSI layer is a router at Answer: Network (3)


⩥ TCP protocol is on what OSI layer Answer: Transport (4)


⩥ OSI layer 1 Answer: Physical Layer (Cable, Hubs, Repeaters)


⩥ OSI layer 2 Answer: Data Link Layer (Frame, Switch, PPP, Ethernet)

, ⩥ OSI layer 3 Answer: Network Layer (Moves packets, IP)


⩥ OSI layer 4 Answer: Transport Layer (TCP, end to end connection)


⩥ OSI Layer 5 Answer: Session Layer (API, Sockets, Synch and send to
port)


⩥ OSI layer 6 Answer: Presentation layer (Syntax and encryption layer,
SSL, SSH, JPEG)


⩥ OSI layer 7 Answer: Application layer (end user layer, http,
applications)


⩥ Network Typology point to point Answer: Two devices connect
directly


⩥ Network Typology bus Answer: All devices connect to a central main
line


⩥ Network Typology Ring Answer: All devices have two connections
and form an endless ring


⩥ Network Typology Star Answer: All devices connect to a central point