What is the primary role of a firewall in network security?

To detect and block malware already present on a host

To provide wireless connectivity for network devices

To encrypt all data transmitted between networks

To filter traffic based on a set of security rules

Which statement best describes how a firewall contributes to network security?

It prevents all unauthorized access by physically disconnecting the network

It guarantees that no malicious traffic can enter the network

It replaces the need for antivirus software on all devices

It acts as a barrier between a trusted internal network and an untrusted external network

A company runs a web server that must be reachable from the internet on HTTPS (TCP 443). The firewall currently has a default-deny policy. Which rule is necessary to meet this requirement?

Allow inbound UDP from any to the web server's IP on port 443.

Allow inbound ICMP from any to the web server's IP.

Allow outbound TCP from the web server to any on port 443.

Allow inbound TCP from any to the web server's IP on port 443.

A firewall rule is: 'Deny UDP from any to any port 53.' Which traffic is blocked by this rule?

Only UDP packets from the firewall's own subnet to port 53.

All TCP packets destined to port 53.

All UDP packets destined to port 53, regardless of source or destination IP.

Only UDP packets from external sources to internal servers on port 53.

A network administrator is comparing two firewall designs. Design 1 uses a default-deny policy with explicit allow rules. Design 2 uses a default-allow policy with explicit deny rules. Which statement accurately describes the security posture of these designs?

Design 1 is less secure because it requires more rules and is harder to manage.

Design 2 is generally more secure because it allows more traffic and reduces user complaints.

Design 1 is generally more secure because any traffic not explicitly allowed is blocked.

Both designs provide the same security because they both have explicit rules.

CiscoCertified Support Technician (CCST) Networking

Domain 6Objective 1

6.1. Describe How Firewalls Operate to Filter Traffic. 100-150 Practice Questions (Page 2)

Part of the Security domain, which makes up ~13% of our current practice bank. Cisco does not publish an official question count, but from its 50-minute exam (~20–35 total, ~3–5 in this domain), expect 1–2 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)

27questions here

6free pages

6concepts

Questions 6–10

6foundation · easy
What is the primary role of a firewall in network security?
Select an answer first
7foundation · easy
Which statement best describes how a firewall contributes to network security?
Select an answer first
8application · easy
A company runs a web server that must be reachable from the internet on HTTPS (TCP 443). The firewall currently has a default-deny policy. Which rule is necessary to meet this requirement?
Select an answer first
9application · easy
A firewall rule is: 'Deny UDP from any to any port 53.' Which traffic is blocked by this rule?
Select an answer first
10application · medium
A network administrator is comparing two firewall designs. Design 1 uses a default-deny policy with explicit allow rules. Design 2 uses a default-allow policy with explicit deny rules. Which statement accurately describes the security posture of these designs?
Select an answer first

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