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D315/ WGU D315 EXAM/ WGU D315 PRE-
ASSESSMENT: NETWORK AND SECURITY
FOUNDATIONS EXAM 2026/2026 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALL ANSWERED {200 Q & A}
ALREADY GRADED A+/ D315 PRE-ASSESSMENT:
NETWORK AND SECURITY FOUNDATONS | BRAND
NEW! | WGU
Which OSI layer is related to the function of the IP protocol suite?
a. Transport
b. Network
c. Data Link
d. Session - ✔✔✔ Correct 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
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c. Transport
d. Data Link - ✔✔✔ Correct 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 - ✔✔✔ Correct Answer > Transport
Which protocol suite performs functions of OSI layer 4?
a. IPX
b. MAC
c. CSMA/CD
d. TCP - ✔✔✔ Correct Answer > TCP
Which type of Ethernet cable can maintain 10Gbps transmission
speeds through the course of its maximum 100-meter length?
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a. CAT 5e
b. CAT 5
c. CAT 3
d. CAT 6a - ✔✔✔ Correct Answer > CAT 6a
Which Internet access technology uses ordinary telephone wires
for data transmission?
a. DSL
b. Cable
c. Wi-Fi
d. Hotspot - ✔✔✔ Correct 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 - ✔✔✔ Correct Answer > Patch Panel
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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 - ✔✔✔ Correct 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 - ✔✔✔ Correct Answer > Modem
Which device could be used to send commands to the mainframe
for remote execution in early mainframe installations?
a. Distributed Screens
b. Dumb Terminals
D315/ WGU D315 EXAM/ WGU D315 PRE-
ASSESSMENT: NETWORK AND SECURITY
FOUNDATIONS EXAM 2026/2026 ACTUAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) ALL ANSWERED {200 Q & A}
ALREADY GRADED A+/ D315 PRE-ASSESSMENT:
NETWORK AND SECURITY FOUNDATONS | BRAND
NEW! | WGU
Which OSI layer is related to the function of the IP protocol suite?
a. Transport
b. Network
c. Data Link
d. Session - ✔✔✔ Correct 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
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c. Transport
d. Data Link - ✔✔✔ Correct 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 - ✔✔✔ Correct Answer > Transport
Which protocol suite performs functions of OSI layer 4?
a. IPX
b. MAC
c. CSMA/CD
d. TCP - ✔✔✔ Correct Answer > TCP
Which type of Ethernet cable can maintain 10Gbps transmission
speeds through the course of its maximum 100-meter length?
,3|Page
a. CAT 5e
b. CAT 5
c. CAT 3
d. CAT 6a - ✔✔✔ Correct Answer > CAT 6a
Which Internet access technology uses ordinary telephone wires
for data transmission?
a. DSL
b. Cable
c. Wi-Fi
d. Hotspot - ✔✔✔ Correct 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 - ✔✔✔ Correct Answer > Patch Panel
, 4|Page
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 - ✔✔✔ Correct 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 - ✔✔✔ Correct Answer > Modem
Which device could be used to send commands to the mainframe
for remote execution in early mainframe installations?
a. Distributed Screens
b. Dumb Terminals
