SEC-450 Firewalls and Network Security
Weekly Quizzes Weeks 1–7 Practice Exam
2026|Most Tested Questions Collection &
Verified Detailed Answers | Tutor Verified
Success Exam) Graded A+
1.
What is the primary purpose of a firewall?
A. Increase network bandwidth
B. Encrypt every file on a computer
C. Control network traffic according to security rules
D. Replace antivirus software
Rationale: A firewall enforces traffic-control policies between
network zones or systems.
2.
Which security objective ensures that information is accessible to
authorized users when needed?
A. Confidentiality
B. Integrity
C. Authentication
D. Availability
Rationale: Availability focuses on reliable and timely access to
systems and information.
3.
Which component of the CIA triad protects information from
unauthorized disclosure?
,A. Availability
B. Integrity
C. Confidentiality
D. Accountability
Rationale: Confidentiality prevents unauthorized parties from
accessing protected information.
4.
Which CIA principle ensures that information has not been
improperly altered?
A. Confidentiality
B. Integrity
C. Availability
D. Authorization
Rationale: Integrity protects data from unauthorized or accidental
modification.
5.
What is an attack surface?
A. The physical area around a firewall
B. The number of employees in an organization
C. The collection of possible points through which an attacker could
gain access
D. The encryption strength of a network
Rationale: An attack surface includes exposed systems, services,
interfaces, applications, and other potential entry points.
6.
Which security concept requires giving users only the access
necessary to perform their duties?
,A. Defense in depth
B. Separation of duties
C. Least privilege
D. Open access
Rationale: Least privilege limits permissions to what is necessary for
authorized work.
7.
What does defense in depth mean?
A. Using only one very strong security control
B. Using multiple layers of security controls
C. Eliminating all network segmentation
D. Encrypting only wireless traffic
Rationale: Defense in depth reduces reliance on a single protective
mechanism.
8.
Which device primarily forwards packets between different
networks?
A. Hub
B. Repeater
C. Router
D. Patch panel
Rationale: Routers use Layer 3 addressing to forward traffic between
networks.
9.
Which OSI layer is primarily associated with IP addressing?
A. Physical
B. Data Link
, C. Network
D. Presentation
Rationale: IP operates primarily at Layer 3, the Network layer.
10.
Which protocol is connection-oriented?
A. UDP
B. ICMP
C. TCP
D. ARP
Rationale: TCP establishes a connection and provides reliable,
ordered delivery.
11.
Which protocol is connectionless?
A. TCP
B. UDP
C. SSH
D. TLS
Rationale: UDP does not establish a connection before transmitting
data.
12.
What is the purpose of TCP's three-way handshake?
A. Encrypt application data
B. Assign IP addresses
C. Establish a TCP connection
D. Resolve domain names
Rationale: SYN, SYN-ACK, and ACK establish the TCP session.
13.
Weekly Quizzes Weeks 1–7 Practice Exam
2026|Most Tested Questions Collection &
Verified Detailed Answers | Tutor Verified
Success Exam) Graded A+
1.
What is the primary purpose of a firewall?
A. Increase network bandwidth
B. Encrypt every file on a computer
C. Control network traffic according to security rules
D. Replace antivirus software
Rationale: A firewall enforces traffic-control policies between
network zones or systems.
2.
Which security objective ensures that information is accessible to
authorized users when needed?
A. Confidentiality
B. Integrity
C. Authentication
D. Availability
Rationale: Availability focuses on reliable and timely access to
systems and information.
3.
Which component of the CIA triad protects information from
unauthorized disclosure?
,A. Availability
B. Integrity
C. Confidentiality
D. Accountability
Rationale: Confidentiality prevents unauthorized parties from
accessing protected information.
4.
Which CIA principle ensures that information has not been
improperly altered?
A. Confidentiality
B. Integrity
C. Availability
D. Authorization
Rationale: Integrity protects data from unauthorized or accidental
modification.
5.
What is an attack surface?
A. The physical area around a firewall
B. The number of employees in an organization
C. The collection of possible points through which an attacker could
gain access
D. The encryption strength of a network
Rationale: An attack surface includes exposed systems, services,
interfaces, applications, and other potential entry points.
6.
Which security concept requires giving users only the access
necessary to perform their duties?
,A. Defense in depth
B. Separation of duties
C. Least privilege
D. Open access
Rationale: Least privilege limits permissions to what is necessary for
authorized work.
7.
What does defense in depth mean?
A. Using only one very strong security control
B. Using multiple layers of security controls
C. Eliminating all network segmentation
D. Encrypting only wireless traffic
Rationale: Defense in depth reduces reliance on a single protective
mechanism.
8.
Which device primarily forwards packets between different
networks?
A. Hub
B. Repeater
C. Router
D. Patch panel
Rationale: Routers use Layer 3 addressing to forward traffic between
networks.
9.
Which OSI layer is primarily associated with IP addressing?
A. Physical
B. Data Link
, C. Network
D. Presentation
Rationale: IP operates primarily at Layer 3, the Network layer.
10.
Which protocol is connection-oriented?
A. UDP
B. ICMP
C. TCP
D. ARP
Rationale: TCP establishes a connection and provides reliable,
ordered delivery.
11.
Which protocol is connectionless?
A. TCP
B. UDP
C. SSH
D. TLS
Rationale: UDP does not establish a connection before transmitting
data.
12.
What is the purpose of TCP's three-way handshake?
A. Encrypt application data
B. Assign IP addresses
C. Establish a TCP connection
D. Resolve domain names
Rationale: SYN, SYN-ACK, and ACK establish the TCP session.
13.
