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A Deployment Professional is alerted that flows between two assets within a local network are communicating at a higher rate than normal between midnight and 2 a.m. The Deployment Professional is asked to determine why this is occurring and decides to create an alert that will send a notification when the communication happens again.
Which action could be used?
A. Run an AQL query
B. Perform Quick search
C. Perform Custom search
D. Create rule to test for events/flows
IBM Security QRadar includes rules that detect a wide range of activities, including excessive firewall denies, multiple failed login attempts, and potential botnet activity. You can also create your own rules to detect unusual activity.
A custom with IBM Security QRadar SIEM V7.2.7 is using Active Directory to authenticate users. After a crash, the authentication servers are down and some users tried to log in before the authentication servers came back up.
What will happen to these users?
A. Local users are able to log in with their local password.
B. Active Directory users are able to log in with their password.
C. Administrative and non-administrative users are unable to log in with their password until authentication servers come back online.
D. Logging on is restricted to administrative users and non-administrative will needed to wait until the authentication server comes back online.
A Deployment Professional working with IBM Security QRadar SIEM V7.2.7 is noticing system notifications relating to performance degradation of the CRE relating to expensive rules. Upon locating the rules that are being expensive they need to be modified to no longer trigger this notification.
What are three causes for a rule to become expensive? (Choose three.)
A. Containing payload matches tests
B. Rule consisting of a large scope
C. Containing payload contains tests
D. Rule consisting of a narrow scope
E. Utilizing non-standard regular expressions
F. Utilizing non-optimized regular expressions
A user can create a custom rule that has a large scope, uses a regex pattern that is not efficient, includes Payload contains tests, or combines the rule with regular expressions. When this custom rule is used, it negatively impacts performance, which can cause events to be incorrectly routed directly to storage. Events are indexed and normalized but they don’t trigger alerts or offenses.
A Deployment Professional is working with IBM Security QRadar SIEM V7.2.7. for a new customer that is trying to create their network hierarchy. The customer currently has more than the maximum of 1,000 network objects and CIDR ranges. A few of the CIDRs of the customer are:
Which supernet should be used to shrink the amount of network objects for the supplied group of CIDRs?
C. C. 22.214.171.124/23
D. D. 126.96.36.199/27
Supernetting, also called Classless Inter-Domain Routing (CIDR), is a way to aggregate multiple Internet addresses of the same class.
Using supernetting, the network address 188.8.131.52/24 and an adjacent address 184.108.40.206/24 can be merged into 220.127.116.11/23. The “23” at the end of the address says that the first 23 bits are the network part of the address, leaving the remaining nine bits for specific host addresses.
A Deployment Professional has detected a big spike in a customer’s “Malware infection detected” rule that monitors their endpoint anti-virus solution. The spike happened over the weekend, but when the rule was checked, it was not changed. Since Monday morning, the rule has spiked and has not yet stopped generating offenses.
What was added to the customer’s QRadar log sources that caused this problem?
B. Flow Collectors
C. Domain Controllers
D. Guest network in their offices.
Rules perform tests on events, flows, or offenses. If all the conditions of a test are met, the rule generates a response.
QRadar QFlow Collector passively collects traffic flows from your network through span ports or network taps. The IBM Security QRadar QFlow Collector also supports the collection of external flow-based data sources, such as NetFlow.
A customer has existing complex network infrastructure with many redundant links and the IP packets are taking different paths for inbound and outbound traffic. A Deployment Professional needs to configure SFlow.
What should be configured in IBM Security QRadar SIEM V7.2.7 to support this specific case?
A. Enable flow forwarding
B. Disable flow forwarding
C. Enable asymmetric flows
D. Disable symmetric flows
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