WGU D315 NETWORK AND SECURITY FOUNDATIONS
LATEST 2025/2026 QUESTIONS AND 100% CORRECT
ANSWERS
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
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?
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
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
c. Execution Displays
d. Command Receivers - Correct Answer-Dumb Terminals
Which device is responsible for implementing network address translation (NAT)?
a. Modem
b. Router
c. NIC
d. Switch - Correct Answer-Router
,Which command produces the following output?
Non-authoritative answer:
Name: www.google.com
Address: 172.217.11.132
a. Dig
b. NsLookup
d. Whois
d. Nmap - Correct Answer-NsLookup
Which command should be used to manually enter the default gateway for a computer?
a. Route
b. Ipconfig
c. ARP
d. netstat - Correct Answer-route
Which network diagnostic tool displays the path packets take between two endpoints?
a. Ifconfig
b. Traceroute
c. FTP
d. NsLookup - Correct Answer-traceroute
Which network type is used to wire multiple PCs to a home router?
a. LAN
b. PAN
c. MAN
d. WAN - Correct Answer-LAN
An office's infrastructure connects network devices and printers through a central
access point without the use of cabling. Which network type does this office use?
a. WLAN
b. WAN
c. CAN
d. SAN - Correct Answer-WLAN
What type of medium is commonly used within a 1000 Mbps Ethernet network?
a. CAT 5
b. CAT5e
c. Coax
d. Wireless - Correct Answer-CAT5e
, Which network topology is shown in the following diagram?
a. Full mesh
b. Star
c. Bus
d. Ring - Correct 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 - Correct 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 - Correct Answer-Ring
Which OSI layer ensures error-free packets?
a. Application
b. Transport
c. Session
d. Presentation - Correct Answer-Transport
Which topology uses a switch or hub to connect to all devices in the same network?
a. Mesh
b. Ring
c. Star
d. Bus - Correct Answer-Star
Which cloud service provides hardware, operating systems, and web servers but not
end-user applications?
a. IaaS
b. PaaS
c. SaaS
d. RaaS - Correct Answer-PaaS
LATEST 2025/2026 QUESTIONS AND 100% CORRECT
ANSWERS
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
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?
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
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
c. Execution Displays
d. Command Receivers - Correct Answer-Dumb Terminals
Which device is responsible for implementing network address translation (NAT)?
a. Modem
b. Router
c. NIC
d. Switch - Correct Answer-Router
,Which command produces the following output?
Non-authoritative answer:
Name: www.google.com
Address: 172.217.11.132
a. Dig
b. NsLookup
d. Whois
d. Nmap - Correct Answer-NsLookup
Which command should be used to manually enter the default gateway for a computer?
a. Route
b. Ipconfig
c. ARP
d. netstat - Correct Answer-route
Which network diagnostic tool displays the path packets take between two endpoints?
a. Ifconfig
b. Traceroute
c. FTP
d. NsLookup - Correct Answer-traceroute
Which network type is used to wire multiple PCs to a home router?
a. LAN
b. PAN
c. MAN
d. WAN - Correct Answer-LAN
An office's infrastructure connects network devices and printers through a central
access point without the use of cabling. Which network type does this office use?
a. WLAN
b. WAN
c. CAN
d. SAN - Correct Answer-WLAN
What type of medium is commonly used within a 1000 Mbps Ethernet network?
a. CAT 5
b. CAT5e
c. Coax
d. Wireless - Correct Answer-CAT5e
, Which network topology is shown in the following diagram?
a. Full mesh
b. Star
c. Bus
d. Ring - Correct 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 - Correct 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 - Correct Answer-Ring
Which OSI layer ensures error-free packets?
a. Application
b. Transport
c. Session
d. Presentation - Correct Answer-Transport
Which topology uses a switch or hub to connect to all devices in the same network?
a. Mesh
b. Ring
c. Star
d. Bus - Correct Answer-Star
Which cloud service provides hardware, operating systems, and web servers but not
end-user applications?
a. IaaS
b. PaaS
c. SaaS
d. RaaS - Correct Answer-PaaS
