Ccna Security Module 5 100%

CCNAS Module 5 100% 1

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

2

An IPS sensor has detected the string confidential across multiple packets in a TCP session. Which type 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

3

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. 4

What are two major drawbacks to using HIPS? (Choose two.) HIPS has difficulty constructing an accurate network picture or coordinating the events happening ac 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 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. 5

Refer to the exhibit. Which option tab on the SDM IPS screen is used to view the Top Threats table and d signatures associated with those threats? Create IPS Edit IPS Security Dashboard IPS Migration 6

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

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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.

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Which type of IPS signature detection is used to distract and confuse attackers? pattern-based detection anomaly-based detection policy-based detection honey pot-based detection

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

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

11 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 12

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 ma attack signature.

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

Which Cisco IOS configuration option instructs the IPS to compile a signature category named ios_ips in 14 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 15

Refer to the exhibit. When modifying an IPS signature action, which two check boxes should be selected create an ACL that denies all traffic from the IP address that is considered the source of the attack and dr 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

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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. 17

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 secon 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. 18 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. 19

Which type of intrusion prevention technology is primarily used by Cisco IPS security appliances? rule-based profile-based signature-based

NetFlow anomaly-based protocol analysis-based

20 Which two benefits does the IPS version 5.x signature format provide over the version 4.x signature form (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