156-315.81.20 Practice Exam 3 — 20 Questions

Question 1

During a Connectivity Upgrade of a cluster, what happens to the traffic when the first member (Member A) is being upgraded and is currently down?

Accepted Answer

Member B takes over all traffic and maintains existing session states.. The goal of a cluster upgrade is to maintain availability. When one member is taken offline for an upgrade, the cluster's failover mechanism ensures that the remaining members take over its traffic. In a Connectivity Upgrade, this is managed carefully to ensure session persistence.

Answer

Traffic is dropped until Member A returns with the new version.

Answer

The Management Server takes over traffic inspection temporarily.

Answer

The cluster enters 'Down' state and requires manual traffic routing.

Question 2

A security engineer configures Threat Emulation to inspect incoming archive files containing nested compressed directories. During testing, an archive containing six nested levels of ZIP files bypasses deep emulation inspection. What is the most likely configuration cause?

Accepted Answer

The maximum archive extraction depth limit in the Threat Emulation advanced settings was reached and traversal stopped.. SandBlast Threat Emulation enforces strict limits on archive extraction depth to protect gateway CPU and memory resources from denial-of-service attacks utilizing zip bombs. Exceeding the maximum archive depth threshold stops recursive extraction, meaning deeply nested files are passed without full emulation analysis. Administrators must balance security depth against gateway performance limits.

Answer

The file type filter profile was configured to exclude compressed archives exceeding four megabytes from sandbox evaluation.

Answer

Threat Extraction was disabled in the active policy layer, causing compressed payloads to bypass all inspection engines automatically.

Answer

The local Threat Emulation private cloud appliance encountered a CPU throttling event during the nested extraction phase.

Question 3

Which cryptographic function is primary in verifying the integrity of IKE packets during the negotiation?

Accepted Answer

SHA-256 hashing.. Integrity is verified using Hashed Message Authentication Codes (HMACs) or similar hashing functions like SHA-256. During IKE negotiation, these algorithms ensure that the packets haven't been tampered with in transit. If an attacker modifies the negotiation parameters, the hash comparison at the receiving end will fail, causing the gateway to drop the packet and prevent a potential man-in-the-middle attack.

Answer

Diffie-Hellman (DH) exchange.

Answer

AES-GCM encryption.

Answer

Public Key Infrastructure (PKI).

Question 4

Which mechanism does ClusterXL use to prevent the 'split-brain' scenario in a High Availability deployment?

Accepted Answer

A dedicated synchronization network interface.. Split-brain occurs when both nodes believe they are the master due to a loss of communication. ClusterXL uses multiple mechanisms, including heartbeat packets over dedicated synchronization links, to ensure nodes remain in contact. If communication fails, logic is applied to prevent both from becoming active. This is crucial for avoiding duplicate IP address conflicts and ensuring consistent policy enforcement across the network infrastructure.

Answer

A shared storage heartbeat file.

Answer

An external load balancer to monitor member health.

Answer

ARP resolution with the default gateway.

Question 5

You are preparing to upgrade a Security Gateway from R80.40 to R81.20 using CPUSE. Before initiating the upgrade, you want to ensure a smooth process. Which TWO actions are recommended best practices? (Choose two.)

Accepted Answer

Take a system snapshot before upgrading.. Taking a system snapshot and verifying sufficient disk space are both recommended best practices before a CPUSE upgrade. A snapshot provides a rollback point, and adequate disk space ensures the upgrade package can be downloaded and installed. Disabling policies, uninstalling hotfixes, and upgrading during peak hours are not recommended and can increase risk.

Answer

Uninstall all hotfixes before upgrading.

Answer

Schedule the upgrade during peak business hours to minimize impact.

Answer

Disable all security policies before upgrading.

Question 6

A firewall engineer is troubleshooting a CoreXL-enabled R81.20 gateway where a single firewall instance appears saturated while others are lightly loaded, even though SecureXL is active and the interface is configured for multi-queue. After reviewing fw ctl multik stat output, the engineer suspects that the distribution of connections across instances is uneven. Which factor most directly explains why CoreXL instance distribution can become skewed on this gateway?

Accepted Answer

A small number of very high-volume, long-lived connections whose source and destination pairs consistently hash to the same firewall instance.. CoreXL dispatches connections to firewall instances based on a hash of connection parameters. When a few long-lived, high-volume flows dominate the traffic mix, their hashes can repeatedly select the same instance, producing one saturated instance while others remain idle. Template state and core reservation schemes do not produce this specific skew pattern.

Answer

The gateway using only two cores for the Firewall Kernel while the remaining cores are reserved exclusively for SecureXL processing.

Answer

The firewall instance count exceeding the number of physical cores, causing instances to time-share and one instance to starve others.

Answer

SecureXL templates being disabled, which forces every packet through the Firewall Kernel and removes instance-level distribution.

Question 7

A security administrator is troubleshooting a Security Gateway that shows low throughput despite low CPU utilization. The administrator runs 'fwaccel stats -s' and observes that the 'Accelerated' packet count is extremely low, while 'F2F' (Forward to Firewall) packets are high. The administrator wants to understand why traffic is being sent to the Firewall path instead of being accelerated. Which of the following is the most likely reason for this behavior?

Accepted Answer

The traffic is being processed by the Firewall path due to a feature that is not supported by SecureXL, such as IPsec VPN or NAT with port translation.. SecureXL accelerates only traffic that does not require complex processing. Features like IPsec VPN, NAT with port translation, and deep inspection force packets to the Firewall path, increasing F2F counts. The low accelerated count and high F2F count indicate that a significant portion of traffic is being handled by the Firewall. The administrator should review the rulebase and gateway configuration for such features.

Answer

The SecureXL templates are disabled, causing all packets to be forwarded to the Firewall path.

Answer

The SecureXL device driver is not loaded, so all packets are handled by the Firewall kernel.

Answer

The CoreXL firewall instances are not properly distributing traffic, causing a bottleneck on a single core.

Question 8

An administrator is configuring Threat Extraction on a R81.20 Security Gateway. They want to ensure that files are sanitized and delivered quickly while maintaining security. Which TWO actions should they take? (Choose two.)

Accepted Answer

Configure Threat Emulation to run in the background while the sanitized file is delivered.. Threat Extraction delivers a sanitized file immediately while Threat Emulation runs in the background on the original. This combination ensures fast delivery with security. Disabling emulation or delivering the original file first compromises security, and size-based sanitization is not a recommended practice.

Answer

Disable Threat Emulation to reduce latency.

Answer

Configure Threat Extraction to only sanitize files larger than 10 MB.

Answer

Set Threat Extraction to deliver the original file and then sanitize it if malicious.

Question 9

A security administrator is troubleshooting a performance bottleneck on a Check Point Security Gateway. The administrator suspects that SecureXL is not accelerating a large portion of traffic. Which command should the administrator use to identify which traffic is being accelerated and which is not?

Accepted Answer

fwaccel stats -s. The 'fwaccel stats -s' command provides comprehensive statistics on SecureXL acceleration, including the number of packets in the fast path, medium path, and slow path. It helps administrators understand which traffic is being accelerated and which is not, enabling targeted performance tuning. Other commands like 'fw monitor' or 'cpview' are useful for different purposes but do not provide the same level of detail on SecureXL acceleration.

Answer

fw ctl zdebug + drop

Answer

fw monitor -e 'accept;'

Answer

cpview -t

Question 10

An administrator is configuring Threat Emulation on a Check Point R81.20 Security Gateway. The administrator wants to ensure that files downloaded from the internet are inspected in a sandbox environment. Which of the following best describes the function of the Threat Emulation blade?

Accepted Answer

It executes files in a virtual sandbox to detect malicious behavior and block threats.. Threat Emulation is a Check Point blade that sends files to a sandbox for dynamic analysis, executing them in a virtual environment to detect malicious behavior. This allows it to catch unknown threats that signature-based methods might miss. The other options describe different blades: Threat Extraction sanitizes content, Anti-Virus uses signatures, and Anti-Bot monitors traffic, none of which provide sandbox execution.

Answer

It inspects network traffic for command and control communication and blocks it.

Answer

It scans files for known virus signatures and blocks them based on a signature database.

Answer

It extracts malicious macros from documents and replaces them with benign content.

Question 11

A security administrator is deploying Identity Awareness on a Check Point R81 Security Gateway using the Identity Agents method. The organization wants to avoid installing additional client software on user workstations. Which Check Point component must be deployed to collect identities from the Active Directory domain controllers without requiring a full Identity Agent on each endpoint?

Accepted Answer

Identity Collector. Identity Collector is specifically designed to gather user identities from Active Directory domain controllers without installing software on user endpoints. It communicates with domain controllers using WMI or the Check Point Identity Collector API, making it suitable for large environments. The other options either require endpoint installation, rely on user interaction, or are management tools that do not collect identities at runtime.

Answer

Endpoint Security Client with Identity Awareness blade enabled

Answer

Captive Portal with AD Query

Answer

SmartConsole Identity Awareness extension

Question 12

Which command is used to verify the current status of SecureXL on a Check Point Security Gateway?

Accepted Answer

fwaccel stat. The command 'fwaccel stat' is the standard utility used to confirm whether SecureXL is enabled and to view its current operational state. Verifying this is the first step in troubleshooting performance issues. If SecureXL is disabled, the system will not perform hardware-assisted packet processing, leading to significantly lower throughput and higher latency, making this command essential for every performance tuning or troubleshooting session performed on the gateway.

Answer

cpconfig

Answer

cphaprob stat

Answer

sim stat

Question 13

An administrator wants to prioritize specific high-bandwidth traffic for acceleration. Which command can influence SecureXL to favor these flows?

Accepted Answer

Adjusting the security policy to remove features that inhibit acceleration.. While there isn't a single command to 'force' acceleration for specific flows, administrators can optimize the policy to ensure these flows don't hit features that disable acceleration. By isolating high-bandwidth traffic into rules that avoid incompatible features (like certain IPS or logging), the administrator creates an environment where SecureXL templates are consistently created. This is a vital performance tuning skill, as it directly impacts the gateway's ability to handle high-throughput traffic at line rate.

Answer

fwaccel enable -p <priority>

Answer

fwaccel offload <flow_id>

Answer

Restarting the kernel using 'fw kernel restart'.

Question 14

When upgrading a cluster, why is it recommended to upgrade the standby member first?

Accepted Answer

The active unit must remain active to prevent downtime.. Upgrading the standby unit first is a core strategy for maintaining high availability during maintenance. This ensures that the active member remains in control of traffic flow, minimizing service downtime. If the upgrade on the standby fails, the primary unit is still available to maintain connectivity. This phased approach allows for a 'soft' migration, where you can verify the new software on the standby before promoting it to active status.

Answer

The active unit is required to pull the upgrade package.

Answer

The active unit automatically pushes the upgrade to the standby.

Answer

It clears the synchronization table on the standby.

Question 15

An administrator is configuring a ClusterXL High Availability cluster. Which requirement is mandatory for the synchronization network to ensure stateful failover?

Accepted Answer

The synchronization interface must be a dedicated link for traffic synchronization to prevent packet loss.. The synchronization network is the backbone of stateful inspection in ClusterXL. It must be a dedicated, non-routable interface or VLAN to prevent latency and congestion from impacting synchronization speed. If synchronization fails or is too slow, the standby member will not have updated connection tables, resulting in dropped sessions during a failover event. This ensures the cluster acts as a single logical entity rather than two isolated gateways.

Answer

The synchronization interface must have a public IP address to allow for external heartbeat monitoring.

Answer

The synchronization network must be configured on the same physical switch as the traffic interfaces.

Answer

The synchronization network must support jumbo frames to allow full table replication in one packet.

Question 16

Refer to the exhibit. What will happen to the ClusterXL HA member if 'eth2' is a monitored interface?

Accepted Answer

The cluster will trigger a failover to the standby member.. ClusterXL monitors the state of all configured interfaces. If a monitored interface is marked as 'Down', the cluster member evaluates whether this constitutes a failure. In a High Availability setup, if a critical interface fails, the cluster member will typically initiate a failover, marking itself as 'Down' or 'Standby' to ensure that traffic is routed through a member that has full network connectivity, thereby maintaining the overall health and availability of the gateway service.

Answer

The member will remain active but logs a warning in SmartConsole.

Answer

The member will force all traffic through the synchronization interface.

Answer

The cluster mode will automatically switch to Load Sharing.

Question 17

A remote access VPN client is failing to connect to the Security Gateway. The logs show 'IKE Phase 1 Main Mode failed to match proposal'. Which configuration component is the most likely culprit?

Accepted Answer

Mismatched encryption or hashing algorithms in the IKE proposal.. Phase 1 failures typically indicate a mismatch in IKE parameters, specifically encryption, integrity, or Diffie-Hellman groups between the gateway and the client. In Check Point VPNs, the gateway must strictly match the IKE proposal defined in the remote access community. Verifying these settings ensures that the security association negotiation completes successfully before Phase 2 starts, preventing connection drops during the initial handshake.

Answer

Incorrect user authentication method defined in the Access Role.

Answer

Expired certificate on the Security Gateway.

Answer

Incorrect Office Mode IP pool allocation.

Question 18

What is the primary benefit of using High Availability (HA) mode over Load Sharing in a Check Point ClusterXL deployment?

Accepted Answer

It provides a more predictable and simpler failover process.. High Availability mode offers the simplest operational model with predictable failover behavior. Because only one node processes traffic, it is easier to troubleshoot, and the standby node remains completely idle, ensuring maximum resources are available if a transition occurs. It is the preferred choice for organizations prioritizing stability and simplicity over the increased throughput potential of more complex load-sharing designs.

Answer

It provides better performance by distributing traffic across both nodes.

Answer

It eliminates the need for synchronization between cluster members.

Answer

It allows the use of different security policies on each member.

Question 19

Refer to the exhibit. An administrator is troubleshooting a failed IKEv2 tunnel. What is the cause of the failure?

Accepted Answer

The peer is sending an identity that is not recognized.. The error message 'IDr mismatch' indicates that the identity sent by the peer does not match the identity configured in the local gateway's VPN community settings. This is a common security feature in IKEv2 to prevent unauthorized peer access. The administrator must ensure that the ID configured in the gateway object matches the ID provided by the remote peer during the authentication phase.

Answer

An incorrect shared secret was provided.

Answer

The IKEv2 proposal is incorrectly configured.

Answer

The VPN tunnel interface (VTI) is down.

Question 20

An administrator notices that users connecting through a Citrix XenApp published application server are all appearing as a single user in Identity Awareness access logs. What is the appropriate solution to resolve this limitation?

Accepted Answer

Deploy the Terminal Server Identity Agent on the Citrix XenApp server.. Standard Identity Awareness mechanisms map IP addresses to users. In multi-user server environments like Citrix or Terminal Services, multiple concurrent users share the exact same server IP address. Deploying the Terminal Server Identity Agent allows the gateway to differentiate users based on dynamic port allocations assigned to each individual session.

Answer

Increase the AD Query timeout value in SmartConsole to prevent session caching conflicts.

Answer

Configure Captive Portal to prompt users for credentials every time they launch a published application.

Answer

Enable Identity Agent in browser-only mode on all client endpoints connecting to Citrix.