WGU D325 NETWORKS COMPREHENSIVE QUESTIONS AND
DETAILED ANSWERS [ALREADY GRADED A+] NEWEST
EDITION 2024
What Does the phrase "All People Seem To Need Data Processing" stand for? -
(correct answer) Layer 7 - Application
Layer 6 - Presentation
Layer 5 - Session
Layer 4 - Transport
Layer 3 - Network
Layer 2 - Data Link
Layer 1 - Physical
What is Addressing? - (correct answer) It is a unique identifier for a network node,
such as a MAC address, IPv4 address, or IPv6 address.
What is the Open System Interconnection Model? - (correct answer) It assigns
network and hardware components and functions at seven discrete layers: Physical,
Data Link, Network, Transport, Session, Presentation, and Application
What is the Open System Interconnection Model? - (correct answer) It assigns
network and hardware components and functions at seven discrete layers: Physical,
Data Link, Network, Transport, Session, Presentation, and Application
What Does the phrase "All People Seem To Need Data Processing" stand for? -
(correct answer) Layer 7 - Application
Layer 6 - Presentation
Layer 5 - Session
Layer 4 - Transport
Layer 3 - Network
Layer 2 - Data Link
Layer 1 - Physical
What is Addressing? - (correct answer) It is a unique identifier for a network node,
such as a MAC address, IPv4 address, or IPv6 address.
What is encapsulation? - (correct answer) A method by which protocols build data
packets by adding headers and trailers to existing data.
What is encapsulation? - (correct answer) A method by which protocols build data
packets by adding headers and trailers to existing data.
What is the physical layer (PHY)? - (correct answer) Lowest layer of the OSI model
providing for the transmission and receipt of data bits from node to node. This includes
the network medium and mechanical and electrical specifications for using the media.
,What is the physical layer (PHY)? - (correct answer) Lowest layer of the OSI model
providing for the transmission and receipt of data bits from node to node. This includes
the network medium and mechanical and electrical specifications for using the media.
What does cabled media have to do with the physical layer? - (correct answer) A
physical signal conductor is provided between two nodes. Examples include cable types
such as copper or fiber optic cable. Cabled media can also be described as bounded
media.
What does cabled media have to do with the physical layer? - (correct answer) A
physical signal conductor is provided between two nodes. Examples include cable types
such as copper or fiber optic cable. Cabled media can also be described as bounded
media.
What does wireless media have to do with the physical layer? - (correct answer) It
uses free space between nodes, such ad microwave radio. Wireless media can also be
described as unbounded media.
What does wireless media have to do with the physical layer? - (correct answer) It
uses free space between nodes, such ad microwave radio. Wireless media can also be
described as unbounded media.
What are devices that operate in the physical layer? - (correct answer) Transceivers
- The part of a network interface that sends and receives signals over the network
media.
Repeater - A device that amplifies an electronic signal to extend the maximum allowable
distance for a media type.
Hub - A multiport repeater, deployed as a central point of connection for nodes.
Media convertor - A device that converts one media signaling type to another.
Modem - A device that performs some type of signal modulation and demodulation,
such ad sending a digital data over an analog line.
What are devices that operate in the physical layer? - (correct answer) Transceivers
- The part of a network interface that sends and receives signals over the network
media.
Repeater - A device that amplifies an electronic signal to extend the maximum allowable
distance for a media type.
Hub - A multiport repeater, deployed as a central point of connection for nodes.
,Media convertor - A device that converts one media signaling type to another.
Modem - A device that performs some type of signal modulation and demodulation,
such ad sending a digital data over an analog line.
What is the data link layer (layer 2)? - (correct answer) OSI model layer responsible
for transferring data between nodes.
What is the data link layer (layer 2)? - (correct answer) OSI model layer responsible
for transferring data between nodes.
What are devices that can operate on the data link layer? - (correct answer)
Network adapter or network interface card (NICs) - QA NIC joins an end system host to
network media (cabling or wireless) and enables it to communicate over the network by
assembling and disassembling frames.
Bridge - A type of intermediate system that joins physical network segments while
minimizing the performance reduction of having more nodes on the same network. A
bridge has multiple ports, each of which functions as a network interface.
Switch - An advanced type of bridge with many ports. A switch creates links between
large numbers of nodes more efficiently.
Wireless Access Point (AP) - An AP allows nodes with wireless network cards to
communicate and creates a bridge between wireless networks and wired ones.
What are devices that can operate on the data link layer? - (correct answer)
Network adapter or network interface card (NICs) - QA NIC joins an end system host to
network media (cabling or wireless) and enables it to communicate over the network by
assembling and disassembling frames.
Bridge - A type of intermediate system that joins physical network segments while
minimizing the performance reduction of having more nodes on the same network. A
bridge has multiple ports, each of which functions as a network interface.
Switch - An advanced type of bridge with many ports. A switch creates links between
large numbers of nodes more efficiently.
Wireless Access Point (AP) - An AP allows nodes with wireless network cards to
communicate and creates a bridge between wireless networks and wired ones.
What is the network layer (layer 3)? - (correct answer) OSI model layer responsible
for logical network addressing and forwarding.
What is the network layer (layer 3)? - (correct answer) OSI model layer responsible
for logical network addressing and forwarding.
, What is a router? - (correct answer) An intermediate system working at the Network
later capable of forwarding packets around logical networks of different layer 1 and layer
2 types.
What is a router? - (correct answer) An intermediate system working at the Network
later capable of forwarding packets around logical networks of different layer 1 and layer
2 types.
What is the main device that operates on the network layer? - (correct answer) A
router
What is the main device that operates on the network layer? - (correct answer) A
router
What is the transport layer (layer 4)? - (correct answer) OSI model layer responsible
for ensuring reliable data delivery.
What is the transport layer (layer 4)? - (correct answer) OSI model layer responsible
for ensuring reliable data delivery.
What is the session layer (layer 5)? - (correct answer) OSI model layer that provides
services for applications that need to exchage multiple messages (dialog control).
What is the session layer (layer 5)? - (correct answer) OSI model layer that provides
services for applications that need to exchage multiple messages (dialog control).
What is the presentation layer (layer 6)? - (correct answer) OSI model layer that
transforms data between the formats used by the network and applications.
What is the presentation layer (layer 6)? - (correct answer) OSI model layer that
transforms data between the formats used by the network and applications.
What is the application layer (layer 7)? - (correct answer) OSI model layer providing
support to applications requiring network services (file transfer, printing, email,
databases, and so on).
What is the application layer (layer 7)? - (correct answer) OSI model layer providing
support to applications requiring network services (file transfer, printing, email,
databases, and so on).
Define the Open Systems Interconnection (OSI) reference model. - (correct answer)
A conceptual model that assigns network and hardware components and functions at
seven discrete layers: Physical, Data Link, Network, Transport, Session, Presentation,
and Application.
DETAILED ANSWERS [ALREADY GRADED A+] NEWEST
EDITION 2024
What Does the phrase "All People Seem To Need Data Processing" stand for? -
(correct answer) Layer 7 - Application
Layer 6 - Presentation
Layer 5 - Session
Layer 4 - Transport
Layer 3 - Network
Layer 2 - Data Link
Layer 1 - Physical
What is Addressing? - (correct answer) It is a unique identifier for a network node,
such as a MAC address, IPv4 address, or IPv6 address.
What is the Open System Interconnection Model? - (correct answer) It assigns
network and hardware components and functions at seven discrete layers: Physical,
Data Link, Network, Transport, Session, Presentation, and Application
What is the Open System Interconnection Model? - (correct answer) It assigns
network and hardware components and functions at seven discrete layers: Physical,
Data Link, Network, Transport, Session, Presentation, and Application
What Does the phrase "All People Seem To Need Data Processing" stand for? -
(correct answer) Layer 7 - Application
Layer 6 - Presentation
Layer 5 - Session
Layer 4 - Transport
Layer 3 - Network
Layer 2 - Data Link
Layer 1 - Physical
What is Addressing? - (correct answer) It is a unique identifier for a network node,
such as a MAC address, IPv4 address, or IPv6 address.
What is encapsulation? - (correct answer) A method by which protocols build data
packets by adding headers and trailers to existing data.
What is encapsulation? - (correct answer) A method by which protocols build data
packets by adding headers and trailers to existing data.
What is the physical layer (PHY)? - (correct answer) Lowest layer of the OSI model
providing for the transmission and receipt of data bits from node to node. This includes
the network medium and mechanical and electrical specifications for using the media.
,What is the physical layer (PHY)? - (correct answer) Lowest layer of the OSI model
providing for the transmission and receipt of data bits from node to node. This includes
the network medium and mechanical and electrical specifications for using the media.
What does cabled media have to do with the physical layer? - (correct answer) A
physical signal conductor is provided between two nodes. Examples include cable types
such as copper or fiber optic cable. Cabled media can also be described as bounded
media.
What does cabled media have to do with the physical layer? - (correct answer) A
physical signal conductor is provided between two nodes. Examples include cable types
such as copper or fiber optic cable. Cabled media can also be described as bounded
media.
What does wireless media have to do with the physical layer? - (correct answer) It
uses free space between nodes, such ad microwave radio. Wireless media can also be
described as unbounded media.
What does wireless media have to do with the physical layer? - (correct answer) It
uses free space between nodes, such ad microwave radio. Wireless media can also be
described as unbounded media.
What are devices that operate in the physical layer? - (correct answer) Transceivers
- The part of a network interface that sends and receives signals over the network
media.
Repeater - A device that amplifies an electronic signal to extend the maximum allowable
distance for a media type.
Hub - A multiport repeater, deployed as a central point of connection for nodes.
Media convertor - A device that converts one media signaling type to another.
Modem - A device that performs some type of signal modulation and demodulation,
such ad sending a digital data over an analog line.
What are devices that operate in the physical layer? - (correct answer) Transceivers
- The part of a network interface that sends and receives signals over the network
media.
Repeater - A device that amplifies an electronic signal to extend the maximum allowable
distance for a media type.
Hub - A multiport repeater, deployed as a central point of connection for nodes.
,Media convertor - A device that converts one media signaling type to another.
Modem - A device that performs some type of signal modulation and demodulation,
such ad sending a digital data over an analog line.
What is the data link layer (layer 2)? - (correct answer) OSI model layer responsible
for transferring data between nodes.
What is the data link layer (layer 2)? - (correct answer) OSI model layer responsible
for transferring data between nodes.
What are devices that can operate on the data link layer? - (correct answer)
Network adapter or network interface card (NICs) - QA NIC joins an end system host to
network media (cabling or wireless) and enables it to communicate over the network by
assembling and disassembling frames.
Bridge - A type of intermediate system that joins physical network segments while
minimizing the performance reduction of having more nodes on the same network. A
bridge has multiple ports, each of which functions as a network interface.
Switch - An advanced type of bridge with many ports. A switch creates links between
large numbers of nodes more efficiently.
Wireless Access Point (AP) - An AP allows nodes with wireless network cards to
communicate and creates a bridge between wireless networks and wired ones.
What are devices that can operate on the data link layer? - (correct answer)
Network adapter or network interface card (NICs) - QA NIC joins an end system host to
network media (cabling or wireless) and enables it to communicate over the network by
assembling and disassembling frames.
Bridge - A type of intermediate system that joins physical network segments while
minimizing the performance reduction of having more nodes on the same network. A
bridge has multiple ports, each of which functions as a network interface.
Switch - An advanced type of bridge with many ports. A switch creates links between
large numbers of nodes more efficiently.
Wireless Access Point (AP) - An AP allows nodes with wireless network cards to
communicate and creates a bridge between wireless networks and wired ones.
What is the network layer (layer 3)? - (correct answer) OSI model layer responsible
for logical network addressing and forwarding.
What is the network layer (layer 3)? - (correct answer) OSI model layer responsible
for logical network addressing and forwarding.
, What is a router? - (correct answer) An intermediate system working at the Network
later capable of forwarding packets around logical networks of different layer 1 and layer
2 types.
What is a router? - (correct answer) An intermediate system working at the Network
later capable of forwarding packets around logical networks of different layer 1 and layer
2 types.
What is the main device that operates on the network layer? - (correct answer) A
router
What is the main device that operates on the network layer? - (correct answer) A
router
What is the transport layer (layer 4)? - (correct answer) OSI model layer responsible
for ensuring reliable data delivery.
What is the transport layer (layer 4)? - (correct answer) OSI model layer responsible
for ensuring reliable data delivery.
What is the session layer (layer 5)? - (correct answer) OSI model layer that provides
services for applications that need to exchage multiple messages (dialog control).
What is the session layer (layer 5)? - (correct answer) OSI model layer that provides
services for applications that need to exchage multiple messages (dialog control).
What is the presentation layer (layer 6)? - (correct answer) OSI model layer that
transforms data between the formats used by the network and applications.
What is the presentation layer (layer 6)? - (correct answer) OSI model layer that
transforms data between the formats used by the network and applications.
What is the application layer (layer 7)? - (correct answer) OSI model layer providing
support to applications requiring network services (file transfer, printing, email,
databases, and so on).
What is the application layer (layer 7)? - (correct answer) OSI model layer providing
support to applications requiring network services (file transfer, printing, email,
databases, and so on).
Define the Open Systems Interconnection (OSI) reference model. - (correct answer)
A conceptual model that assigns network and hardware components and functions at
seven discrete layers: Physical, Data Link, Network, Transport, Session, Presentation,
and Application.
