C172 WGU - Network & Security Foundations
200+ Questions and Answers 2026 Practice
1.
Guide
Layer 5 of the OSI model is also referred to as: Session layer
a. Session layer
b. Application layer
c. Transport layer
d. Presentation layer
2. Which of the answers listed below refer to the com- Router
ponents that can be found at the OSI network layer?
(Select 3 answers) IP address
a. Router Packet
b. Network cabling
c. IP address
d. TCP/UDP protocols
e. Switch
f. Packet
3. The term "Presentation layer" refers to: Layer 6 of the OSI model
a. Layer 7 of the OSI model
b. Layer 5 of the OSI model
c. Layer 6 of the OSI model
d. Layer 4 of the OSI model
4. Layer 2 of the OSI model is known as: Data link layer
a. Transport layer
b. Network layer
c. Data link layer
d. Physical layer
5. Layer 3
, C172 WGU - Network & Security Foundations
200+ Questions and Answers 2026 Practice
Guideto the OSI network
Which of the following terms refers
layer?
a. Layer 2
b. Layer 5
c. Layer 3
d. Layer 4
6. Which of the protocols listed below reside at the OSI UDP (User Datagram Pro-
transport layer? (Select 2 answers) tocol)
a. UDP (User Datagram Protocol) TCP (Transmission Control
b. SSL/TLS (Secure Socket Layer/Transport Layer Secu- Protocol)
rity)
c. ICMP (Internet Control Message Protocol)
d. TCP (Transmission Control Protocol)
e. ATM (Asynchronous Transfer Mode)
7. Which OSI layer assumes the responsibility for man- Session layer
aging network connections between applications?
a. Network layer
b. Data link layer
c. Application layer
d. Session layer
8. Physical layer of the OSI model is also known as: Layer 1
a. Layer 2
b. Layer 7
c. Layer 1
d. Layer 4
,9. Layer 4 of the OSI model is also referred to as: Transport layer
a. Network layer
b. Data link layer
c. Session Layer
d. Transport layer
10. Character encoding, data compression and encryp- Presentation layer of the
tion/decryption take place at the: OSI model
a. Application layer of the OSI model
b. Presentation layer of the OSI model
c. Session layer of the OSI model
d. Transport layer of the OSI model
11. Which of the following protocols reside at the applica- HTTP (Hypertext Transfer
tion layer of the OSI model? (Select 3 answers) Protocol)
a. ATM (Asynchronous Transfer Mode) FTP (File Transfer Proto-
b. HTTP (Hypertext Transfer Protocol) col)
c. FTP (File Transfer Protocol)
d. IP (Internet Protocol) SMTP (Simple Mail Trans-
e. SMTP (Simple Mail Transfer Protocol) fer Protocol)
f. TCP/UDP (Transmission Control Protocol/User Data-
gram Protocol)
12. In computer networking, the term "Collision" refers to True
a situation in which two or more demands are made
simultaneously on an equipment that can handle only
one request at any given moment.
a. True
b. False
, 13. A network segment utilizing only this type of device is Hub
the most prone to network performance degradation
due to large number of network collisions.
a. Bridge
b. Hub
c. Switch
d. Router
14. Which device improves network performance by divid- Switch
ing a given network segment into separate collision
domains?
a. Hub
b. Repeater
c. Switch
d. Router
15. Which of the devices listed below is used for separat- Router
ing broadcast domains?
a. Router
b. Switch
c. Repeater
d. Hub
16. The purpose of the Carrier Sense Multiple Access True
(CSMA) protocol is to verify the absence of other traffic
on a shared medium before transmitting to prevent
collisions and loss of data.
a. True
b. False
200+ Questions and Answers 2026 Practice
1.
Guide
Layer 5 of the OSI model is also referred to as: Session layer
a. Session layer
b. Application layer
c. Transport layer
d. Presentation layer
2. Which of the answers listed below refer to the com- Router
ponents that can be found at the OSI network layer?
(Select 3 answers) IP address
a. Router Packet
b. Network cabling
c. IP address
d. TCP/UDP protocols
e. Switch
f. Packet
3. The term "Presentation layer" refers to: Layer 6 of the OSI model
a. Layer 7 of the OSI model
b. Layer 5 of the OSI model
c. Layer 6 of the OSI model
d. Layer 4 of the OSI model
4. Layer 2 of the OSI model is known as: Data link layer
a. Transport layer
b. Network layer
c. Data link layer
d. Physical layer
5. Layer 3
, C172 WGU - Network & Security Foundations
200+ Questions and Answers 2026 Practice
Guideto the OSI network
Which of the following terms refers
layer?
a. Layer 2
b. Layer 5
c. Layer 3
d. Layer 4
6. Which of the protocols listed below reside at the OSI UDP (User Datagram Pro-
transport layer? (Select 2 answers) tocol)
a. UDP (User Datagram Protocol) TCP (Transmission Control
b. SSL/TLS (Secure Socket Layer/Transport Layer Secu- Protocol)
rity)
c. ICMP (Internet Control Message Protocol)
d. TCP (Transmission Control Protocol)
e. ATM (Asynchronous Transfer Mode)
7. Which OSI layer assumes the responsibility for man- Session layer
aging network connections between applications?
a. Network layer
b. Data link layer
c. Application layer
d. Session layer
8. Physical layer of the OSI model is also known as: Layer 1
a. Layer 2
b. Layer 7
c. Layer 1
d. Layer 4
,9. Layer 4 of the OSI model is also referred to as: Transport layer
a. Network layer
b. Data link layer
c. Session Layer
d. Transport layer
10. Character encoding, data compression and encryp- Presentation layer of the
tion/decryption take place at the: OSI model
a. Application layer of the OSI model
b. Presentation layer of the OSI model
c. Session layer of the OSI model
d. Transport layer of the OSI model
11. Which of the following protocols reside at the applica- HTTP (Hypertext Transfer
tion layer of the OSI model? (Select 3 answers) Protocol)
a. ATM (Asynchronous Transfer Mode) FTP (File Transfer Proto-
b. HTTP (Hypertext Transfer Protocol) col)
c. FTP (File Transfer Protocol)
d. IP (Internet Protocol) SMTP (Simple Mail Trans-
e. SMTP (Simple Mail Transfer Protocol) fer Protocol)
f. TCP/UDP (Transmission Control Protocol/User Data-
gram Protocol)
12. In computer networking, the term "Collision" refers to True
a situation in which two or more demands are made
simultaneously on an equipment that can handle only
one request at any given moment.
a. True
b. False
, 13. A network segment utilizing only this type of device is Hub
the most prone to network performance degradation
due to large number of network collisions.
a. Bridge
b. Hub
c. Switch
d. Router
14. Which device improves network performance by divid- Switch
ing a given network segment into separate collision
domains?
a. Hub
b. Repeater
c. Switch
d. Router
15. Which of the devices listed below is used for separat- Router
ing broadcast domains?
a. Router
b. Switch
c. Repeater
d. Hub
16. The purpose of the Carrier Sense Multiple Access True
(CSMA) protocol is to verify the absence of other traffic
on a shared medium before transmitting to prevent
collisions and loss of data.
a. True
b. False
