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CHAPTER 4: NETWORK SECURITY
QUESTIONS AND ANSWERS 2025
Application programming interface (API) - correct answer- A set
of routines, standards, protocols, and tools for building software
applications to access a web-based software application or web
tool.
Bit - correct answer- The most essential representation of data
(zero or one) at Layer 1 of the Open Systems Interconnection
(OSI) model.
Broadcast - correct answer- Broadcast transmission is a one-
to-many (one-to-everyone) form of sending internet traffic.
Byte - correct answer- The byte is a unit of digital information
that most commonly consists of eight bits.
Cloud computing - correct answer- A model for enabling
ubiquitous, convenient, on-demand network access to a shared
pool of configurable computing resources (e.g., networks,
servers, storage, applications, and services) that can be rapidly
provisioned and released with minimal management effort or
service provider interaction. NIST 800-145
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Community cloud - correct answer- A system in which the cloud
infrastructure is provisioned for exclusive use by a specific
community of consumers from organizations that have shared
concerns (e.g., mission, security requirements, policy and
compliance considerations). It may be owned, managed and
operated by one or more of the organizations in the community,
a third party or some combination of them, and it may exist on
or off premises. NIST 800-145
De-encapsulation - correct answer- The opposite process of
encapsulation, in which bundles of data are unpacked or
revealed.
Denial-of-Service (DoS) - correct answer- The prevention of
authorized access to resources or the delaying of time-critical
operations. (Time-critical may be milliseconds or it may be
hours, depending upon the service provided.) Source: NIST SP
800-27 Rev A
Domain Name Service (DNS) - correct answer- This acronym
can be applied to three interrelated elements: a service, a
physical server and a network protocol.
CHAPTER 4: NETWORK SECURITY
QUESTIONS AND ANSWERS 2025
Application programming interface (API) - correct answer- A set
of routines, standards, protocols, and tools for building software
applications to access a web-based software application or web
tool.
Bit - correct answer- The most essential representation of data
(zero or one) at Layer 1 of the Open Systems Interconnection
(OSI) model.
Broadcast - correct answer- Broadcast transmission is a one-
to-many (one-to-everyone) form of sending internet traffic.
Byte - correct answer- The byte is a unit of digital information
that most commonly consists of eight bits.
Cloud computing - correct answer- A model for enabling
ubiquitous, convenient, on-demand network access to a shared
pool of configurable computing resources (e.g., networks,
servers, storage, applications, and services) that can be rapidly
provisioned and released with minimal management effort or
service provider interaction. NIST 800-145
, 2 | Page
Community cloud - correct answer- A system in which the cloud
infrastructure is provisioned for exclusive use by a specific
community of consumers from organizations that have shared
concerns (e.g., mission, security requirements, policy and
compliance considerations). It may be owned, managed and
operated by one or more of the organizations in the community,
a third party or some combination of them, and it may exist on
or off premises. NIST 800-145
De-encapsulation - correct answer- The opposite process of
encapsulation, in which bundles of data are unpacked or
revealed.
Denial-of-Service (DoS) - correct answer- The prevention of
authorized access to resources or the delaying of time-critical
operations. (Time-critical may be milliseconds or it may be
hours, depending upon the service provided.) Source: NIST SP
800-27 Rev A
Domain Name Service (DNS) - correct answer- This acronym
can be applied to three interrelated elements: a service, a
physical server and a network protocol.
