WGU C172 NETWORK AND SECURITY
FOUNDATIONS PA AND OA EXAM 2026
VERIFIED QUESTIONS AND DETAILED
SOLUTIONS
◉ application. Answer: layer of the osi model that interacts with
application programs that incorporate a communication component
such as your internet browser and email
◉ aPplication. Answer: layer of the osi model that is also responsible
for logging the message in, interpreting the request, and
determining what information is needed to support the request
◉ applicatioN. Answer: Hypertext Transfer Protocol (HTTP) for web
browsing, File Transfer Protocol (FTP) for transferring files, and
Simple Mail Transfer Protocol (SMTP) for email transmission are
examples of which osi model layer?
◉ Is the connection to the machine down (layer 1). Answer: What is
step one of the three basic steps in the process of isolating a network
problem?
◉ Is the network down? layer 3. Answer: What is step two of the
three basic steps in the process of isolating a network problem?
,◉ Is a service on a specific machine down? layer 7. Answer: What is
step three of the three basic steps in the process of isolating a
network problem?
◉ A connection to the server is up. Answer: A reply from" response
from a ping indicates whate?"
◉ the network connection is down. Answer: A request timed out"
response from a ping indicates what?"
◉ to provide for the flow of data MAC addresses. Answer: What is
the function of the data link layer of the osi model?
◉ to provide routing decisions IP, IPX. Answer: What is the function
of the network layer?
◉ to ensure error free packets. Answer: What is the function of the
transport layer of the osi model?
◉ to establish, manage, and terminate NFS, SQL sessions. Answer:
What is the function of the session layer of the osi model?
, ◉ to ensure protocol conversion, data transactions ASCII, JPEG.
Answer: What is the function of the presentation layer of the osi
model?
◉ to support applications HTTP, FTP, and SMTP(email). Answer:
What is function of the application layer of the osi model?
◉ Ethernet. Answer: Which networking protocol is used in most
modern computer networks?
◉ Ethernet. Answer: A carrier sense multiple access with collision
detection protocol for local area networks
◉ Ethernet systems. Answer: Must have the capability to detect data
collisions (collision detection) to avoid two or more computers from
attempting to broadcast a message at the same time.
◉ packet. Answer: Provide grouping of information for transmission
◉ The preamble, start frame delimiter, destination and source
addresses, and length/type field. Answer: What does the header of a
packet consist of?
FOUNDATIONS PA AND OA EXAM 2026
VERIFIED QUESTIONS AND DETAILED
SOLUTIONS
◉ application. Answer: layer of the osi model that interacts with
application programs that incorporate a communication component
such as your internet browser and email
◉ aPplication. Answer: layer of the osi model that is also responsible
for logging the message in, interpreting the request, and
determining what information is needed to support the request
◉ applicatioN. Answer: Hypertext Transfer Protocol (HTTP) for web
browsing, File Transfer Protocol (FTP) for transferring files, and
Simple Mail Transfer Protocol (SMTP) for email transmission are
examples of which osi model layer?
◉ Is the connection to the machine down (layer 1). Answer: What is
step one of the three basic steps in the process of isolating a network
problem?
◉ Is the network down? layer 3. Answer: What is step two of the
three basic steps in the process of isolating a network problem?
,◉ Is a service on a specific machine down? layer 7. Answer: What is
step three of the three basic steps in the process of isolating a
network problem?
◉ A connection to the server is up. Answer: A reply from" response
from a ping indicates whate?"
◉ the network connection is down. Answer: A request timed out"
response from a ping indicates what?"
◉ to provide for the flow of data MAC addresses. Answer: What is
the function of the data link layer of the osi model?
◉ to provide routing decisions IP, IPX. Answer: What is the function
of the network layer?
◉ to ensure error free packets. Answer: What is the function of the
transport layer of the osi model?
◉ to establish, manage, and terminate NFS, SQL sessions. Answer:
What is the function of the session layer of the osi model?
, ◉ to ensure protocol conversion, data transactions ASCII, JPEG.
Answer: What is the function of the presentation layer of the osi
model?
◉ to support applications HTTP, FTP, and SMTP(email). Answer:
What is function of the application layer of the osi model?
◉ Ethernet. Answer: Which networking protocol is used in most
modern computer networks?
◉ Ethernet. Answer: A carrier sense multiple access with collision
detection protocol for local area networks
◉ Ethernet systems. Answer: Must have the capability to detect data
collisions (collision detection) to avoid two or more computers from
attempting to broadcast a message at the same time.
◉ packet. Answer: Provide grouping of information for transmission
◉ The preamble, start frame delimiter, destination and source
addresses, and length/type field. Answer: What does the header of a
packet consist of?
