WGU D315 - PRE-ASSESSMENT NETWORK
AND SECURITY - FOUNDATION OSI
QUESTIONS AND ANSWERS
1. Which OSI layer is related to the function of the IP protocol suite?
a. Transport
b. Network
c. Data Link
d. Session
ANS Network
2. 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
ANS Data Link
,3. 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
ANS Transport
4. Which protocol suite performs functions of OSI layer 4?
a. IPX
b. MAC
c. CSMA/CD
d. TCP
ANS TCP
5. 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
ANS Router
6. 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)
ANS Layer 3 (Network)
7. 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
ANS Layer 3
, 8. 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
ANS to ensure the integrity and reliability of data communications on networks, and is a Layer 4
protocol
9. A switch is a Layer 1 device and unlike a hub it creates a direct
connection to
devices on the network.
True
False
ANS False
10. 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
AND SECURITY - FOUNDATION OSI
QUESTIONS AND ANSWERS
1. Which OSI layer is related to the function of the IP protocol suite?
a. Transport
b. Network
c. Data Link
d. Session
ANS Network
2. 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
ANS Data Link
,3. 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
ANS Transport
4. Which protocol suite performs functions of OSI layer 4?
a. IPX
b. MAC
c. CSMA/CD
d. TCP
ANS TCP
5. 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
ANS Router
6. 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)
ANS Layer 3 (Network)
7. 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
ANS Layer 3
, 8. 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
ANS to ensure the integrity and reliability of data communications on networks, and is a Layer 4
protocol
9. A switch is a Layer 1 device and unlike a hub it creates a direct
connection to
devices on the network.
True
False
ANS False
10. 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
