WGU C172 NETWORK AND SECURITY FOUNDATIONS
PA AND OA SET LATEST VERSION UPDATED AND
REVISED IN 2025-2026
Open systems interconnect reference model - ANSWER->OSI Who was
the OSI model developed by? - ANSWER->The
International Organization for Standardization
What year was the OSI model developed? - ANSWER->1984
What is the purpose of the OSI model? - ANSWER->to enable different
types of networks to be linked together
What is OSI meant for? - ANSWER->To provide a framework for
networking devices that ensure compatibility in the network hardware
and software.
What is the OSI model meant to accelerate? - ANSWER->The
development of new networking technologies.
What is layer 1 of the OSI model? - ANSWER->Physical
The layer of the OSI model that provides the electrical and mechanical
connection to the network. - ANSWER->physical
UTP, fiber, and network interface cards are examples of which layer of
the OSI model? - ANSWER->physicaL
,What is layer 2 of the OSI model? - ANSWER->Data link
Layer of the OSI model that handles error recovery, flow control
(synchronization), and sequencing (which terminals are sending and
which are receiving) - ANSWER->data link
Also called the media access control layer - ANSWER->data Link
The layer of the OSI model where the Media Access Control or
MAC, addressing is defined - ANSWER->data lInk
Where is the Ethernet 802.3 standard defined? - ANSWER->In the MAC
or media access control
Also called the Ethernet address - ANSWER->MAC or media access
control
MAC addresses are an example of which layer of the OSI model? -
ANSWER->data linK
What is layer 3 of the OSI model? - ANSWER->Network
layer of the OSI model that accepts outgoing messages and combines
messages or segments into packets, adding a header that includes
routing information. - ANSWER->network
Acts as the network controller - ANSWER->network layer of the
OSI model
Internet Protocol (IP) and internetwork packet exchange (IPX) are
examples of which layer of the OSI model? - ANSWER>networK
, What is layer 4 of the OSI model? - ANSWER->Transport
layer of the OSI model that is concerned with message integrity
between source and destination - ANSWER->transport
layer of the osi model that also segments/reassembles the packes and
handles flow control - ANSWER->tRansport
Transmission control protocol (TCP) and User Datagram
Protocol are examples of which layer of the OSI model? - ANSWER-
>transporT
What is layer 5 of the osi model? - ANSWER->Session
layer of the osi model that provides the control functions necessary to
establish, manage, and terminate the connections as required to satisfy
the user request - ANSWER->session
Network File system (NFS) and Structured Query Language
(SQL) are examples of which osi model layer? - ANSWER-
>sessioN
What is layer 6 of the osi model? - ANSWER->Presentation
layer of the osi model that accepts and structures the messages
for the application. If necessary, it will translate one code to
another - ANSWER->presentation
layer of the osi model that is also responsible for data compression and
encryption - ANSWER->pResentation American Standard Code for
PA AND OA SET LATEST VERSION UPDATED AND
REVISED IN 2025-2026
Open systems interconnect reference model - ANSWER->OSI Who was
the OSI model developed by? - ANSWER->The
International Organization for Standardization
What year was the OSI model developed? - ANSWER->1984
What is the purpose of the OSI model? - ANSWER->to enable different
types of networks to be linked together
What is OSI meant for? - ANSWER->To provide a framework for
networking devices that ensure compatibility in the network hardware
and software.
What is the OSI model meant to accelerate? - ANSWER->The
development of new networking technologies.
What is layer 1 of the OSI model? - ANSWER->Physical
The layer of the OSI model that provides the electrical and mechanical
connection to the network. - ANSWER->physical
UTP, fiber, and network interface cards are examples of which layer of
the OSI model? - ANSWER->physicaL
,What is layer 2 of the OSI model? - ANSWER->Data link
Layer of the OSI model that handles error recovery, flow control
(synchronization), and sequencing (which terminals are sending and
which are receiving) - ANSWER->data link
Also called the media access control layer - ANSWER->data Link
The layer of the OSI model where the Media Access Control or
MAC, addressing is defined - ANSWER->data lInk
Where is the Ethernet 802.3 standard defined? - ANSWER->In the MAC
or media access control
Also called the Ethernet address - ANSWER->MAC or media access
control
MAC addresses are an example of which layer of the OSI model? -
ANSWER->data linK
What is layer 3 of the OSI model? - ANSWER->Network
layer of the OSI model that accepts outgoing messages and combines
messages or segments into packets, adding a header that includes
routing information. - ANSWER->network
Acts as the network controller - ANSWER->network layer of the
OSI model
Internet Protocol (IP) and internetwork packet exchange (IPX) are
examples of which layer of the OSI model? - ANSWER>networK
, What is layer 4 of the OSI model? - ANSWER->Transport
layer of the OSI model that is concerned with message integrity
between source and destination - ANSWER->transport
layer of the osi model that also segments/reassembles the packes and
handles flow control - ANSWER->tRansport
Transmission control protocol (TCP) and User Datagram
Protocol are examples of which layer of the OSI model? - ANSWER-
>transporT
What is layer 5 of the osi model? - ANSWER->Session
layer of the osi model that provides the control functions necessary to
establish, manage, and terminate the connections as required to satisfy
the user request - ANSWER->session
Network File system (NFS) and Structured Query Language
(SQL) are examples of which osi model layer? - ANSWER-
>sessioN
What is layer 6 of the osi model? - ANSWER->Presentation
layer of the osi model that accepts and structures the messages
for the application. If necessary, it will translate one code to
another - ANSWER->presentation
layer of the osi model that is also responsible for data compression and
encryption - ANSWER->pResentation American Standard Code for
