NET + n10-008 100%
VERIFIED ANSWERS
2024/2025 CORRECT
Which of the following organizations developed the Open Systems
Interconnection
(OSI) model?
A. International Telecommunication Union (ITU-T)
B. Comité Consultatif International Télégraphique et Téléphonique (CCITT)
C. American National Standards Institute (ANSI)
D. Institute of Electrical and Electronics Engineers (IEEE)
E. International Organization for Standardization (ISO)
E. ISO developed and published the OSI model to serve as a conceptual model for
software and hardware developers. The ITU-T, formerly known as the CCITT,
coordinates the development and advancement of international telecommunication
networks and services. ANSI is a private organization that administers and coordinates
a United States-based standardization and conformity assessment system. The IEEE
publishes standards that define data link and physical layer standards. These standards
are referred to collectively as the 802 series
At which of the following layers of the Open Systems Interconnection (OSI) model
do the
protocols on a typical local area network (LAN) use media access control (MAC)
addresses
to identify other computers on the network?
A. Physical
B. Data link

C. Network
D. Transport
B. The Ethernet (or IEEE 802.3) protocol at the data link layer uses MAC addresses to
idenitify computers on the local network. MAC addresses are coded into the firmware of
physical network interface adapters by the manufacturer. The physical layer deals with
signals and is not involved in addressing. The IP protocol at the network layer has its
own addressing system. The transport layer protocols are not involved in addressing.
Which layer of the Open Systems Interconnection (OSI) model is responsible for
the logical
addressing of end systems and the routing of datagrams on a network?
A. Physical
B. Data link
C. Network
D. Transport
E. Session
F. Presentation
G. Application
C. Network layer protocols (such as IP) contain headers that specify logical addresses
for end system communication and route datagrams across a network. The physical
layer defines standards for physical and mechanical characteristics of a network. The
data link layer uses media access control (MAC) or hardware addresses, not logical
addresses. The transport layer uses port numbers, not logical addresses. Session layer
protocols create and maintain a dialogue between end systems. Presentation layer
protocols are responsible for the formatting, translation, and presentation of information.
The application layer provides an entry point for applications to access the protocol
stack and prepare information for transmission across a network.
On a TCP/IP network, which layers of the Open Systems Interconnection (OSI)
model contain
protocols that are responsible for encapsulating the data generated by an

application,
creating the payload for a packet that will be transmitted over a network?
(Choose all
that apply.)
A. Physical
B. Data link
C. Network
D. Transport
E. Session
F. Presentation
G. Application
B, C, D. Before the payload data generated by an application can be transmitted over a
TCP/ IP network, the system must encapsulate it by applying protocol headers and
footers at three layers of the OSI model. The data link layer applies a header and footer
to create an Ethernet frame. The network layer applies a header to create an IP
datagram. The transport layer applies a TCP or UDP header to create a segment or
datagram. The other model layers are involved in the payload transmission process, but
they do not encapsulate the payload.
What layer of the Open Systems Interconnection (OSI) model is responsible for
translating
and formatting information?
A. Physical
B. Data link
C. Network
D. Transport
E. Session
F. Presentation
G. Application

F. The presentation layer implements functions that provide formatting, translation, and
presentation of information. No other layers of the OSI model translate and format
application data.
Which of the following devices typically operates at the network layer of the Open
Systems
Interconnection (OSI) model?
A. Proxy server
B. Hub
C. Network interface adapter
D. Router
D. A router connects networks at the network layer of the OSI model. Proxy servers
operate at the application layer. Network interface adapters operate at both the data link
and the physical layers. Hubs are physical layer devices.
Which layer of the Open Systems Interconnection (OSI) model provides an
entrance point to
the protocol stack for applications?
A. Physical
B. Data link
C. Network
D. Transport
E. Session
F. Presentation
G. Application
G. The application layer provides an entry point for applications to access the protocol
stack and prepare information for transmission across a network. All other layers of the
OSI model reside below this layer and rely on this entry point.
Which layer of the Open Systems Interconnection (OSI) model is responsible for
dialogue

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2024-2025 NET + n10-008 Practice Exam with Answers (202 Solved Questions)

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