CCNA Security, chapter 5 Exam.

Questions and answers above 90% correct.

1.     An IPS sensor has detected the string confidential across multiple packets in a TCP session. Which type of signature trigger and signature type does this describe?

–  Trigger: Anomaly-based detection
Type: Atomic signature

-Trigger: Anomaly-based detection
Type: Composite signature

-Trigger: Pattern-based detection
Type: Atomic signature

Trigger: Pattern-based detection
Type: Composite signature

-Trigger: Policy-based detection
Type: Atomic signature

-Trigger: Policy-based detection
Type: Composite signature

2.     A network administrator tunes a signature to detect abnormal activity that might be malicious and likely to be an immediate threat. What is the perceived severity of the signature?

-high
medium
-low
-informational

3.     What are two major drawbacks to using HIPS? (Choose two.)
HIPS has difficulty constructing an accurate network picture or coordinating the events happening across the entire network.
– HIPS installations are vulnerable to fragmentation attacks or variable TTL attacks.
With HIPS, the network administor must verify support for all the different operating systems used in the network.
-If the network traffic stream is encrypted, HIPS is unable to access unencrypted forms of the traffic.
– With HIPS, the success or failure of an attack cannot be readily determined.

4.     Which type of intrusion detection triggers an action if excessive activity occurs beyond a specified threshold of normal activity?
-pattern-based detection
anomaly-based detection
-policy-based detection
-honey pot-based detection

5.     Which two statements characterize a network-based IPS implementation? (Choose two.)
-It makes hosts visible to attackers.
It is unable to examine encrypted traffic.
-It monitors to see if an attack was successful.
-It provides application-level encryption protection.
It is independent of the operating system on hosts.

6.     What information is provided by the show ip ips configuration configuration command?
-detailed IPS signatures
-alarms that were sent since the last reset
-the number of packets that are audited
the default actions for attack signatures

7.     When editing IPS signatures with SDM, which action drops all future packets from a TCP flow?
-Deny Packet Inline
-Deny TCP Connection
-Deny Attacker Inline
Deny Connection Inline

8.


Refer to the exhibit. A user was installing a Flash Player upgrade when the CSA displayed the dialog box shown. Which default action is taken by CSA if the user does not respond within 4 minutes and 20 seconds?
-The action is allowed, and a log entry is recorded.
-The action is allowed, and CSA does not prompt the user again.
The action is denied, and a log entry is recorded.
-The action is denied, and the FlashPlayerUpdate.exe application is terminated.

9.


Refer to the exhibit. When modifying an IPS signature action, which two check boxes should be selected to create an ACL that denies all traffic from the IP address that is considered the source of the attack and drops the packet and all future packets from the TCP flow? (Choose two.)
Deny Attacker Inline
Deny Connection Inline
-Deny Packet Inline
-Produce Alert
-Reset TCP Connection

10.


Refer to the exhibit. What is the significance of the number 10 in the signature 6130 10 command?
-It is the alert severity.
-It is the signature number.
-It is the signature version.
It is the subsignature ID.
-It is the signature fidelity rating.

11.     What is a disadvantage of network-based IPS as compared to host-based IPS?
– Network-based IPS is less cost-effective.
Network-based IPS cannot examine encrypted traffic.
-Network-based IPS does not detect lower level network events.
-Network-based IPS should not be used with multiple operating systems.

12.     Which two files could be used to implement Cisco IOS IPS with version 5.x format signatures? (Choose two.)
-IOS-Sxxx-CLI.bin
IOS-Sxxx-CLI.pkg
-IOS-Sxxx-CLI.sdf
-realm-cisco.priv.key.txt
realm-cisco.pub.key.txt

13.     Why is a network that deploys only IDS particularly vulnerable to an atomic attack?
-The IDS must track the three-way handshake of established TCP connections.
-The IDS must track the three-way handshake of established UDP connections.
The IDS permits malicious single packets into the network.
-The IDS requires significant router resources to maintain the event horizon.
-The stateful properties of atomic attacks usually require the IDS to have several pieces of data to match an attack signature.

14.


Refer to the exhibit. Based on the SDM screen shown, which two actions will the signature take if an attack is detected? (Choose two.)
-Reset the TCP connection to terminate the TCP flow.
-Drop the packet and all future packets from this TCP flow.
Generate an alarm message that can be sent to a syslog server.
-Drop the packet and permit remaining packets from this TCP flow.
Create an ACL that denies traffic from the attacker IP address.

15.     Which two Cisco IOS commands are required to enable IPS SDEE message logging? (Choose two.)
-logging on
-ip ips notify log
ip http server
ip ips notify sdee
-ip sdee events 500

16.


Refer to the exhibit. Which option tab on the SDM IPS screen is used to view the Top Threats table and deploy signatures associated with those threats?
-Create IPS
-Edit IPS
Security Dashboard
-IPS Migration

17.     Which Cisco IOS configuration option instructs the IPS to compile a signature category named ios_ips into memory and use it to scan traffic?

-R1(config)# ip ips signature-category
R1(config-ips-category)# category all
R1(config-ips-category-action)# retired false

R1(config)# ip ips signature-category
R1(config-ips-category)# category ios_ips basic
R1(config-ips-category-action)# retired false

-R1(config)# ip ips signature-category
R1(config-ips-category)# category all
R1(config-ips-category-action)# enabled true

-R1(config)# ip ips signature-category
R1(config-ips-category)# category ios_ips basic
R1(config-ips-category-action)# enabled true

18.


Refer to the exhibit. What is the result of issuing the Cisco IOS IPS commands on router R1?
-A named ACL determines the traffic to be inspected.
– A numbered ACL is applied to S0/0/0 in the outbound direction.
– All traffic that is denied by the ACL is subject to inspection by the IPS.
All traffic that is permitted by the ACL is subject to inspection by the IPS.

19.     What are two IPS configuration best practices that can help improve IPS efficiency in a network? (Choose two.)
-Configure all sensors to check the server for new signature packs at the same time to ensure that they are all synchronized.
-Configure the sensors to simultaneously check the FTP server for new signature packs.
Ensure that signature levels that are supported on the management console are synchronized with the signature packs on the sensors.
-Update signature packs manually rather than automatically to maintain close control when setting up a large deployment of sensors.
Place signature packs on a dedicated FTP server within the management network.

20.


Refer to the exhibit. What is the significance of the small red flag waving in the Windows system tray?
-Cisco Security Agent is installed but inactive.
-Network-based IPS is active and has detected a potential security problem.
Cisco Security Agent is active and has detected a potential security problem.
-A network-based IPS sensor has pushed an alert to a host running Cisco Security Agent.

21.     Which two benefits does the IPS version 5.x signature format provide over the version 4.x signature format? (Choose two.)
-addition of signature micro engines
-support for IPX and AppleTalk protocols
addition of a signature risk rating
-support for comma-delimited data import
support for encrypted signature parameters

One comment on “CCNA Security, chapter 5 Exam.

  1. Interesting material, many thanks for sharing these in CCNA Security, chapter 5 Exam. oscarnya blog-blognya oscar.

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