WGU D315 network and security
foundations Questions and Answers 2026
updated
Which OSI layer is related to the function of the IP protocol suite?
a. Transport
b. Network
c. Data Link
d. Session - 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 - 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 - Transport
Which protocol suite performs functions of OSI layer 4?
a. IPX
b. MAC
c. CSMA/CD
d. TCP - 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 - CAT 6a
,Which Internet access technology uses ordinary telephone wires for data transmission?
a. DSL
b. Cable
c. Wi-Fi
d. Hotspot - 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 - 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 - 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 - 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 - Dumb Terminals
Which device is responsible for implementing network address translation (NAT)?
a. Modem
b. Router
c. NIC
d. Switch - Router
,Which command produces the following output?
Non-authoritative correct answer:
Name: www.google.com
Address: 172.217.11.132
a. dig
b. nslookup
d. whois
d. nmap - nslookup
Which command should be used to manually enter the default gateway for a computer?
a. route
b. ipconfig
c. arp
d. netstat - route
Which network diagnostic tool displays the path packets take between two endpoints?
a. ifconfig
b. traceroute
c. ftp
d. nslookup - traceroute
Which network type is used to wire multiple PCs to a home router?
a. LAN
b. PAN
c. MAN
d. WAN - 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 - WLAN
What type of medium is commonly used within a 1000 Mbps Ethernet network?
a. CAT 5
b. CAT5e
c. Coax
d. Wireless - CAT5e
, Which network topology is shown in the following diagram?
a. Full mesh
b. Star
c. Bus
d. Ring - 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 - 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 - Ring
Which OSI layer ensures error-free packets?
a. Application
b. Transport
c. Session
d. Presentation - 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 - Star
Which cloud service provides hardware, operating systems, and web servers but not
end-user applications?
a. IaaS
b. PaaS
c. SaaS
d. RaaS - PaaS
foundations Questions and Answers 2026
updated
Which OSI layer is related to the function of the IP protocol suite?
a. Transport
b. Network
c. Data Link
d. Session - 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 - 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 - Transport
Which protocol suite performs functions of OSI layer 4?
a. IPX
b. MAC
c. CSMA/CD
d. TCP - 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 - CAT 6a
,Which Internet access technology uses ordinary telephone wires for data transmission?
a. DSL
b. Cable
c. Wi-Fi
d. Hotspot - 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 - 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 - 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 - 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 - Dumb Terminals
Which device is responsible for implementing network address translation (NAT)?
a. Modem
b. Router
c. NIC
d. Switch - Router
,Which command produces the following output?
Non-authoritative correct answer:
Name: www.google.com
Address: 172.217.11.132
a. dig
b. nslookup
d. whois
d. nmap - nslookup
Which command should be used to manually enter the default gateway for a computer?
a. route
b. ipconfig
c. arp
d. netstat - route
Which network diagnostic tool displays the path packets take between two endpoints?
a. ifconfig
b. traceroute
c. ftp
d. nslookup - traceroute
Which network type is used to wire multiple PCs to a home router?
a. LAN
b. PAN
c. MAN
d. WAN - 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 - WLAN
What type of medium is commonly used within a 1000 Mbps Ethernet network?
a. CAT 5
b. CAT5e
c. Coax
d. Wireless - CAT5e
, Which network topology is shown in the following diagram?
a. Full mesh
b. Star
c. Bus
d. Ring - 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 - 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 - Ring
Which OSI layer ensures error-free packets?
a. Application
b. Transport
c. Session
d. Presentation - 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 - Star
Which cloud service provides hardware, operating systems, and web servers but not
end-user applications?
a. IaaS
b. PaaS
c. SaaS
d. RaaS - PaaS
