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Question bank
Securing Networks with Cisco Firewalls (SNCF)
40 Securing Networks with Cisco Firewalls (SNCF) questions with the correct answer and a written explanation, organised across 5 exam domains.
- 40 questions
- 5 domains
- Foundation level
certilumQuestion index
Jump straight to any question. Answers and explanations are inline.
Integration & Troubleshooting
6 questions in this domain
- Question 1Single Choice
On the Cisco Syslog severity scale, which value represents an Emergency event?
- A0Correct answer
- B7
- C1
- D5
Why this is the answer
Cisco Syslog uses 0 for Emergency, the most severe level, and 7 for Debugging, the least severe.
- Question 2Multiple Select
Which practices align with SNMP best practices described in SNCF?
- AUse SNMPv3 with auth/encryptionCorrect answer
- BSend traps over OOB management networkCorrect answer
- CEnable USM-based usersCorrect answer
- DUse SNMPv2c community strings
Why this is the answer
SNMPv3 USM provides SHA/MD5 authentication and AES/DES encryption. A dedicated OOB management network protects monitoring traffic from interception.
- Question 3Interactive
Based on the configuration shown, which SNMP security model is configured?
- ASNMPv3 authPrivCorrect answer
- BSNMPv1 with community strings
- CSNMPv2c with community strings
- DSyslog over TLS
Why this is the answer
The command includes SNMPv3 with SHA authentication, AES encryption, and a named user, so it defines authPriv security.
- Question 4Single Choice
Why is Syslog inefficient for monitoring long-term CPU trend data?
- ASyslog is event-based; SNMP is metric-basedCorrect answer
- BSyslog has cryptographic integrity by default
- CSyslog uses OIDs for CPU values
- DSyslog only runs on the data plane
Why this is the answer
Syslog sends event messages rather than periodic state metrics. SNMP is designed to poll or trap metric data such as CPU utilization.
- Question 5Multiple Select
Which statements accurately describe the Packet Tracer tool in FMC?
- ASimulates packet path through FTD logicCorrect answer
- BDisplays actual packet headers and payloads
- CShows expected result without live trafficCorrect answer
- DIdentifies which rule/inspection engine decides the flowCorrect answer
Why this is the answer
Packet Tracer is a simulation engine. It shows what should happen and identifies the decision path without generating actual live traffic.
- Question 6Interactive
What is the purpose of the diagnostic command shown in the code block?
- ASimulates packet flow through device logicCorrect answer
- BCaptures live packets on the inside interface
- CExports Syslog events to a collector
- DPolls an SNMP OID from the device
Why this is the answer
The packet-tracer command simulates a packet's path through the firewall so the engineer can determine which rule or inspection engine would apply.
Secure Firewall Architecture & Design
6 questions in this domain
- Question 7Single Choice
On Cisco security devices, what standardized numeric scale is used to classify syslog messages generated from the firewall?
- A0 to 7Correct answer
- B1 to 8
- C0 to 3
- D1 to 10
Why this is the answer
Cisco syslog uses a 0-7 scale, with 0 as Emergency and 7 as Debugging, allowing administrators to filter events by priority.
- Question 8Multiple Select
Which statements correctly describe the operational behavior of SNMP traps and SNMP polling when used for firewall monitoring? Select all that apply.
- ATraps are unsolicited push messages from the agent.Correct answer
- BPolling is a pull request from the management station.Correct answer
- CTraps are sent when a specific event occurs.Correct answer
- DPolling sends unsolicited data to the firewall.
Why this is the answer
Traps use a push model triggered by events; polling uses a pull model where the manager requests OIDs. Both are needed for complete monitoring.
- Question 9Interactive
In the displayed logging configuration, using a dedicated source interface on the firewall supports which important management best practice?
- AManagement plane isolationCorrect answer
- BData plane acceleration
- CSNMPv3 authentication
- DPacket tracing
Why this is the answer
Best practice dictates sending syslog/SNMP over a dedicated management or OOB network to avoid data-plane congestion and protect monitoring traffic.
- Question 10Single Choice
What security feature does SNMPv3's User-based Security Model add to firewall management traffic when compared with SNMPv1 and SNMPv2c?
- AAuthentication and encryptionCorrect answer
- BCommunity string obfuscation
- CAutomatic interface discovery
- DHigher polling frequency
Why this is the answer
SNMPv3's USM provides strong authentication (SHA/MD5) and encryption (AES/DES), avoiding the insecure community strings of earlier SNMP versions.
- Question 11Multiple Select
Which are necessary practices for successful syslog integration with a SIEM when using Cisco firewalls? Select all that apply.
- AUse a structured or predictable log formatCorrect answer
- BVerify the remote syslog server receives packetsCorrect answer
- CMap message IDs to security eventsCorrect answer
- DUse syslog for CPU trend monitoring
Why this is the answer
Structured output, reception checks, and message ID mapping make syslog SIEM-ready; syslog is not intended for CPU metric tracking.
- Question 12Interactive
What is the primary function of the BPF filter syntax used in the displayed packet capture command?
- ALimit capture scope to specified trafficCorrect answer
- BDecrypt all captured payloads
- CBlock matching packets
- DChange firewall policy
Why this is the answer
BPF filters restrict capture scope by IP, port, and protocol, preventing CPU and storage overload during high-throughput troubleshooting.
Secure Firewall Configuration
12 questions in this domain
- Question 13Single Choice
What does Syslog severity level 0 indicate on Cisco devices?
- AEmergencyCorrect answer
- BAlert
- CError
- DDebugging
Why this is the answer
Level 0 is Emergency, indicating the most severe condition that requires immediate attention. Lower numbers correspond to higher severity.
- Question 14Multiple Select
Which two security features are provided by SNMPv3 User-based Security Model (USM)?
- AAuthentication using SHA or MD5Correct answer
- BEncryption using AES or DESCorrect answer
- CPlaintext community-string authentication
- DNo confidentiality for payloads
Why this is the answer
SNMPv3 USM provides authentication and encryption, unlike the insecure community strings of SNMPv1/v2c.
- Question 15Interactive
What Syslog severity level is indicated by the message shown?
- A0
- B2
- C4Correct answer
- D6
Why this is the answer
The '4' in the syslog tag %ASA-4-106023 indicates severity level 4, which is Warning.
- Question 16Single Choice
How is an SNMP Trap message delivered to a network management station?
- AAs an unsolicited push from agent to managerCorrect answer
- BAs a response to a manager poll for OID data
- COnly when the management station requests it
- DThrough a syslog server broadcast
Why this is the answer
SNMP Traps are unsolicited push messages sent by the agent when an event occurs; polling is the manager requesting OID data.
- Question 17Multiple Select
Which two practices help isolate the management plane for Syslog and SNMP traffic?
- AUse a dedicated management interfaceCorrect answer
- BRoute monitoring traffic over data-plane interfaces
- CUse untrusted out-of-band networks
- DUse a trusted OOB networkCorrect answer
Why this is the answer
Best practice is to send Syslog and SNMP over a dedicated management interface or trusted OOB network to avoid congestion and interception.
- Question 18Interactive
What security option is enabled by the 'priv' keyword in the SNMP command shown?
- ASNMPv3 authentication and encryptionCorrect answer
- BSNMPv1 community string
- CSNMPv2c community string
- DUnencrypted SNMPv3 with no authentication
Why this is the answer
The 'priv' keyword in SNMPv3 config indicates both authentication and privacy/encryption are enabled.
- Question 19Single Choice
Why is Syslog inefficient for tracking real-time CPU or memory trend data?
- ASyslog is event-based and not designed for metric pollingCorrect answer
- BSyslog supports encrypted metric OIDs
- CSyslog messages are always dropped
- DSyslog provides only state information
Why this is the answer
SNMP provides state/metric-based data collection, which is efficient for CPU trends; Syslog is event-based and not suitable for trend analysis.
- Question 20Multiple Select
Which two statements are true about SNMPv2c?
- AUses community strings for authenticationCorrect answer
- BProvides no encryption or confidentialityCorrect answer
- CIncludes USM authentication and encryption
- DRequires AES encryption
Why this is the answer
SNMPv2c uses community strings and no encryption; SNMPv3 USM addresses security. SNMPv2c is not sufficient for compliance.
- Question 21Interactive
According to the configuration shown, which syslog messages are forwarded to the remote server?
- AOnly severity level 4 messages
- BMessages from severity 0 through 4Correct answer
- CMessages from severity 4 through 7
- DAll severity levels except emergency
Why this is the answer
logging trap 4 configures syslog to send messages with severity level 0 through 4 (Emergency through Warning).
- Question 22Single Choice
Which tool should be used to verify that a packet actually arrives at the firewall interface?
- AOn-Box Packet CaptureCorrect answer
- BPacket Tracer
- CSNMP polling
- DConnection summary report
Why this is the answer
On-box packet capture intercepts traffic at a specific interface, showing if packets arrive. Packet Tracer is a simulation and does not capture real packets.
- Question 23Multiple Select
Which two statements correctly describe the FMC Packet Tracer tool?
- AIt simulates a packet's path through the deviceCorrect answer
- BIt shows which policy or rule would deny the flowCorrect answer
- CIt captures real packet headers from live traffic
- DIt copies payload data for malware analysis
Why this is the answer
Packet Tracer simulates rule/NAT/inspection logic, not live traffic. It does not capture actual headers or payloads.
- Question 24Interactive
What traffic will be included by the filter shown in the capture command?
- AOnly UDP traffic to port 443
- BTCP traffic destined for port 443Correct answer
- CAll ICMP traffic
- DAny traffic on port 443 regardless of protocol
Why this is the answer
The BPF filter 'tcp and dst port 443' limits the capture to TCP packets with destination port 443.
Secure Firewall Management Center
8 questions in this domain
- Question 25Single Choice
On the Cisco syslog severity scale used by Firepower devices, what is the correct numerical range for message levels?
- A0 through 7Correct answer
- B1 through 8
- C0 through 3
- D0 through 5
Why this is the answer
Cisco syslog uses levels 0 through 7, from Emergency (0) to Debugging (7). Filtering at the source prevents SIEM noise.
- Question 26Multiple Select
Which two security services are provided by SNMPv3's User-based Security Model, or USM, for management plane protection?
- AAuthentication using SHA or MD5Correct answer
- BEncryption using AES or DESCorrect answer
- CPlain-text community string validation
- DAutomatic syslog forwarding
Why this is the answer
USM provides authentication and encryption. Community strings are associated with SNMPv1/v2c and should not be used when security is required.
- Question 27Interactive
Refer to the code. Which syslog messages are forwarded to the remote host based on the configured severity level?
- AWarnings and more severe messages (0 through 4)Correct answer
- BOnly messages with severity exactly 4
- CWarnings and less severe messages (5 through 7)
- DOnly messages at level 0
Why this is the answer
The trap warnings command forwards severities 0 through 4. Numeric 4 is Warning, and lower numbers are increasingly severe.
- Question 28Single Choice
How do SNMP traps and polling differ in a firewall monitoring environment that uses Cisco Firepower Management Center?
- ATraps are unsolicited pushes; polling is a request/response pullCorrect answer
- BTraps are pull-based; polling is push-based
- CBoth use community strings to provide encryption
- DTraps are only used for syslog, while polling is used for SNMP
Why this is the answer
SNMP traps are unsolicited push notifications from agent to manager; polling is a pull model where the manager requests OID values.
- Question 29Multiple Select
Which two practices should be applied to syslog and SNMP traffic to protect a secure firewall deployment?
- ASend monitoring traffic over a dedicated management interfaceCorrect answer
- BUse an out-of-band network for syslog and SNMPCorrect answer
- CRoute monitoring traffic through the data plane to avoid extra interfaces
- DEnable SNMPv1 to maximize compatibility
Why this is the answer
Management plane isolation uses dedicated interfaces or OOB networks to avoid data plane congestion and protect monitoring traffic from interception.
- Question 30Interactive
Based on the code, what SNMPv3 security level does the 'priv' keyword specify for the configured host?
- AAuthentication and encryptionCorrect answer
- BAuthentication only
- CEncryption only without authentication
- DNo authentication and no encryption
Why this is the answer
The priv keyword in SNMPv3 enables both authentication and privacy encryption. It provides stronger protection than noAuth or authNoPriv.
- Question 31Single Choice
Which FMC tool simulates a packet's path through the FTD device without generating real traffic on the network?
- APacket TracerCorrect answer
- BOn-box Packet Capture
- CSNMP Polling
- DRemote Syslog
Why this is the answer
Packet Tracer simulates the inspection path and determines which policy or feature would affect a flow without sending live traffic.
- Question 32Multiple Select
Which two types of monitoring traffic are typically isolated on a dedicated management or out-of-band network?
- ASNMPCorrect answer
- BSyslogCorrect answer
- CEnd-user HTTP traffic
- DFirewall-to-firewall VPN data
Why this is the answer
Syslog and SNMP are monitoring protocols and should be carried over a dedicated management or out-of-band network to reduce risk.
Security Policy & Threat Defense
8 questions in this domain
- Question 33Single Choice
What is the complete range of Syslog severity levels used by Cisco devices?
- A0 to 7Correct answer
- B1 to 8
- C0 to 6
- D1 to 7
Why this is the answer
Cisco devices use Syslog severity levels 0 through 7, from Emergency to Debugging. This scale is fundamental for filtering high-priority security events.
- Question 34Multiple Select
Which security features are provided by SNMPv3?
- AAuthentication using SHA or MD5Correct answer
- BEncryption using AES or DESCorrect answer
- CPlaintext community strings for access
- DDisabling all security on network devices
Why this is the answer
SNMPv3 User-based Security Model supports SHA/MD5 authentication and AES/DES encryption, unlike insecure community strings in earlier versions.
- Question 35Interactive
In the provided configuration snippet, which range of Syslog severity levels will be forwarded to the remote server?
- AEmergency through Warning (0-4)Correct answer
- BEmergency through Error (0-3)
- CNotification through Debugging (4-7)
- DOnly Warning (4)
Why this is the answer
The logging trap command with level 4 sends messages from severity 0 through severity 4, which includes Emergency through Warning.
- Question 36Single Choice
Which protocol should be used to monitor CPU and memory utilization trends on a Cisco firewall?
- ASNMPCorrect answer
- BSyslog
- CPacket Tracer
- DFile event tracking
Why this is the answer
SNMP is designed for metric and state data, while Syslog is event-based. CPU and memory trends should be monitored with SNMP polling.
- Question 37Multiple Select
Which practices align with Management Plane Isolation?
- ASend Syslog and SNMP traffic over a dedicated management interfaceCorrect answer
- BUse a trusted out-of-band network for monitoring trafficCorrect answer
- CShare data plane interfaces with management traffic
- DExpose the management interface to the internet
Why this is the answer
Management plane isolation uses dedicated management interfaces and OOB networks to prevent congestion and protect monitoring traffic from interception.
- Question 38Interactive
In the provided SNMPv3 host command, which security level is being requested by the final keyword?
- AauthNoPriv
- BnoAuthNoPriv
- CauthPrivCorrect answer
- DprivNoAuth
Why this is the answer
The priv keyword in SNMPv3 configuration means authentication and encryption are both required, corresponding to the authPriv security level.
- Question 39Single Choice
What is the primary purpose of Packet Tracer in FMC?
- ASimulate the logical path of a packet through the deviceCorrect answer
- BCapture actual packet headers in real time
- CSend live test traffic to a production host
- DQuery SNMP OIDs for device statistics
Why this is the answer
Packet Tracer simulates how a packet would flow through NAT, access control, and inspection engines without generating real traffic.
- Question 40Multiple Select
Which fields can be used with BPF syntax to limit packet capture scope?
- ASource IP addressCorrect answer
- BDestination portCorrect answer
- CProtocolCorrect answer
- DUser identity
Why this is the answer
BPF capture filters support source/destination IP, port, and protocol fields. User identity is a higher-level search filter, not BPF syntax.
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