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Security Foundations - D481 Questions with Answers
(100% Correct Answers
A set of protocols made up of four layers (Application, Transport,
Network, Network Interface Layer) used to connect network devices to
each other Answer: TCP/IP (Transmission Control Protocol/Internet
Protocol)
TCP/IP model layer that establishes how data should be physically
sent through the network.
Ethernet
In conjunction with layers 1 PHYSICAL and 2 DATA LINK Answer:
Network Interface Layer (TCP/IP)
TCP/IP model layer that defines the logical transmission protocols for
the whole network.
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- IP ( Internet Protocol)
- ARP ( Address Resolution Protocol)
- ICMP (Internet Contol Message Protocol)
- IGMP
in conjunction with layer 3 NETWORK of the OSI Model. Answer:
Network Layer (TCP/IP)
TCP/IP model layer that s responsible for the end-to-end transport of
data. The protocols that live in this layer are.
- TCP (Transmission Control Protocol)
- UDP (User Datagram Protocol)
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,3
In conjunction with layer 4 TRANSPORT of the OSI Model Answer:
Transport Layer (TCP/IP)
TCP/IP model layer that is responsible for the communication
protocols between nodes. The protocols in this layer include.
- HTTP (Hyper Text Transfer Protocol)
- SSH (Secure Shell)
- FTTP
- Telnet
- NTP (Network Time Protocol)
- DHCP
- PING
In conjunction with Layers 5 SESSION, 6 PRESENTATION, AND 7
APPLICATION of the OSI model. Answer: Application Layer (TCP/IP)
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Layer 1 of the OSI Model responsible for the physical connections of
the devices in the network. This layer is implemented through the use
of devices such as hubs, repeaters, modem devices, and physical
cabling. Answer: Physical Layer (OSI model)
Layer 2 of the OSI Model responsible for the error-free delivery of data
to the receiving device or node. This layer is implemented through the
use of devices such as switches and bridge devices, as well as anything
with a network interface, like wireless or wired network cards.
Answer: Data Link Layer (OSI Model)
Layer 3 of the OSI Model responsible for the transmission of data
between hosts in different networks as well as routing of data packets.
This layer is implemented through the use of devices such as routers
and some switches. Answer: Network Layer (OSI Model)
Layer 4 of the OSI Model provides services to the application layer and
receives services from the network layer and is responsible for the
reliable delivery of data. It segments and reassembles data in the
correct order for it to be sent to the receiving device. It may also handle
the reliable delivery of data and any retries of data that are lost or
© 2025 All rights reserved
Security Foundations - D481 Questions with Answers
(100% Correct Answers
A set of protocols made up of four layers (Application, Transport,
Network, Network Interface Layer) used to connect network devices to
each other Answer: TCP/IP (Transmission Control Protocol/Internet
Protocol)
TCP/IP model layer that establishes how data should be physically
sent through the network.
Ethernet
In conjunction with layers 1 PHYSICAL and 2 DATA LINK Answer:
Network Interface Layer (TCP/IP)
TCP/IP model layer that defines the logical transmission protocols for
the whole network.
© 2025 All rights reserved
,2
- IP ( Internet Protocol)
- ARP ( Address Resolution Protocol)
- ICMP (Internet Contol Message Protocol)
- IGMP
in conjunction with layer 3 NETWORK of the OSI Model. Answer:
Network Layer (TCP/IP)
TCP/IP model layer that s responsible for the end-to-end transport of
data. The protocols that live in this layer are.
- TCP (Transmission Control Protocol)
- UDP (User Datagram Protocol)
© 2025 All rights reserved
,3
In conjunction with layer 4 TRANSPORT of the OSI Model Answer:
Transport Layer (TCP/IP)
TCP/IP model layer that is responsible for the communication
protocols between nodes. The protocols in this layer include.
- HTTP (Hyper Text Transfer Protocol)
- SSH (Secure Shell)
- FTTP
- Telnet
- NTP (Network Time Protocol)
- DHCP
- PING
In conjunction with Layers 5 SESSION, 6 PRESENTATION, AND 7
APPLICATION of the OSI model. Answer: Application Layer (TCP/IP)
© 2025 All rights reserved
, 4
Layer 1 of the OSI Model responsible for the physical connections of
the devices in the network. This layer is implemented through the use
of devices such as hubs, repeaters, modem devices, and physical
cabling. Answer: Physical Layer (OSI model)
Layer 2 of the OSI Model responsible for the error-free delivery of data
to the receiving device or node. This layer is implemented through the
use of devices such as switches and bridge devices, as well as anything
with a network interface, like wireless or wired network cards.
Answer: Data Link Layer (OSI Model)
Layer 3 of the OSI Model responsible for the transmission of data
between hosts in different networks as well as routing of data packets.
This layer is implemented through the use of devices such as routers
and some switches. Answer: Network Layer (OSI Model)
Layer 4 of the OSI Model provides services to the application layer and
receives services from the network layer and is responsible for the
reliable delivery of data. It segments and reassembles data in the
correct order for it to be sent to the receiving device. It may also handle
the reliable delivery of data and any retries of data that are lost or
© 2025 All rights reserved
