WGU D315 - PRE-ASSESSMENT-
NETWORK AND SECURITY
FOUNDATIONS OSI EXAM
QUESTIONS & VERIFIED 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 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
What layer of the OSI model does a router operate?
Layer 6 (Presentation)
Layer 2 (Data Link)
Layer 1 (Physical)
Layer 3 (Network)
Layer 7 (Application) - correct answer ✔✔Layer 3 (Network)
,IP addressing is used on which layer of the OSI model to route source and destination IP traffic?
Layer 3
Layer 4
Layer 7
Layer 5
Layer 2 - correct answer ✔✔Layer 3
TCP is used on IP networks to:
a. decrease the need for switches, and is a Layer 4 protocol
b. increase the security of the network, and is a Layer 4 protocol
c. reduce the overhead of data transmissions, and is a Layer 5 protocol
d. to ensure the integrity and reliability of data communications on networks, and is a Layer 4
protocol - correct answer ✔✔to ensure the integrity and reliability of data communications on
networks, and is a Layer 4 protocol
A switch is a Layer 1 device and unlike a hub it creates a direct connection to devices on the
network.
True
False - correct answer ✔✔False
Because MAC addressing is a Layer 3 protocol, it is wise to choose a router that can use MAC
addresses to transverse the internet.
, True
False - correct answer ✔✔False
What is a logical address? What is a physical address?
MAC Address/IP Address
IPv4 address/IPv6 address
IP Address/ Mac address
IPv6 address/ IPv4 address - correct answer ✔✔IP Address/ Mac address
What is an example of a UTP cable?
Fiber Optics LC cable
CAT5 cable
Coaxial cable
InfiniBand - correct answer ✔✔CAT5 cable
If a windows administrator is on a windows computer and needs to get the IP Address of the
computer they are working on what tool should the admin use.
ifconfig
ipconfig
netstat
ftp - correct answer ✔✔ipconfig
If a network admin needs to see if a TCP connection is active on a computer what tool should
they use?
NETWORK AND SECURITY
FOUNDATIONS OSI EXAM
QUESTIONS & VERIFIED 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 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
What layer of the OSI model does a router operate?
Layer 6 (Presentation)
Layer 2 (Data Link)
Layer 1 (Physical)
Layer 3 (Network)
Layer 7 (Application) - correct answer ✔✔Layer 3 (Network)
,IP addressing is used on which layer of the OSI model to route source and destination IP traffic?
Layer 3
Layer 4
Layer 7
Layer 5
Layer 2 - correct answer ✔✔Layer 3
TCP is used on IP networks to:
a. decrease the need for switches, and is a Layer 4 protocol
b. increase the security of the network, and is a Layer 4 protocol
c. reduce the overhead of data transmissions, and is a Layer 5 protocol
d. to ensure the integrity and reliability of data communications on networks, and is a Layer 4
protocol - correct answer ✔✔to ensure the integrity and reliability of data communications on
networks, and is a Layer 4 protocol
A switch is a Layer 1 device and unlike a hub it creates a direct connection to devices on the
network.
True
False - correct answer ✔✔False
Because MAC addressing is a Layer 3 protocol, it is wise to choose a router that can use MAC
addresses to transverse the internet.
, True
False - correct answer ✔✔False
What is a logical address? What is a physical address?
MAC Address/IP Address
IPv4 address/IPv6 address
IP Address/ Mac address
IPv6 address/ IPv4 address - correct answer ✔✔IP Address/ Mac address
What is an example of a UTP cable?
Fiber Optics LC cable
CAT5 cable
Coaxial cable
InfiniBand - correct answer ✔✔CAT5 cable
If a windows administrator is on a windows computer and needs to get the IP Address of the
computer they are working on what tool should the admin use.
ifconfig
ipconfig
netstat
ftp - correct answer ✔✔ipconfig
If a network admin needs to see if a TCP connection is active on a computer what tool should
they use?
