Download 乐档网，我分享,我快乐! http://www.ledlh.cn/ 本文档下载自乐档网，更... Show 乐档网，我分享,我快乐! http://www.ledlh.cn/ 本文档下载自乐档网，更多免费文档请访问网址 http://www.ledlh.cn http://www.ledlh.cn/doc/info-d0e80a3543323968011c9226.html CCNAS chapter 5 Exam CCNAS 在线章节第五章答案 Cisco CCNA Security, chapter 5 Exam. Questions and answers 100% 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 乐档网，我分享,我快乐! http://www.ledlh.cn/ 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? 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. 乐档网，我分享,我快乐! http://www.ledlh.cn/ 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. high medium low informational Type: Composite signature Trigger: Policy-based detection Type: Atomic signature Trigger: Policy-based detection Type: Composite signature 4. Which type of intrusion detection triggers an action if excessive activity occurs beyond a specified threshold of normal activity? 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. 乐档网，我分享,我快乐! http://www.ledlh.cn/ It is independent of the operating system on hosts. 6. What information is provided by the show ip ips configuration configuration command? 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 detailed IPS signatures alarms that were sent since the last reset the number of packets that are audited the default actions for attack signatures pattern-based detection anomaly-based detection policy-based detection honey pot-based detection 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 乐档网，我分享,我快乐! http://www.ledlh.cn/ not respond within 4 minutes and 20 seconds? 9. 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. 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 10 乐档网，我分享,我快乐! http://www.ledlh.cn/ . Deny Connection Inline Deny Packet Inline Produce Alert Reset TCP Connection Refer to the exhibit. What is the significance of the number 10 in the signature 6130 10 command? 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 乐档网，我分享,我快乐! http://www.ledlh.cn/ signatures? (Choose two.) IOS-Sxxx-CLI.bin 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. 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. 14 乐档网，我分享,我快乐! http://www.ledlh.cn/ . The stateful properties of atomic attacks usually require the IDS to have several pieces of data to match an attack signature. 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 乐档网，我分享,我快乐! http://www.ledlh.cn/ 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? 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? 乐档网，我分享,我快乐! http://www.ledlh.cn/ 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 Create IPS Edit IPS Security Dashboard IPS Migration 乐档网，我分享,我快乐! http://www.ledlh.cn/ 18. Refer to the exhibit. What is the result of issuing the Cisco IOS IPS commands on router R1? 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 乐档网，我分享,我快乐! http://www.ledlh.cn/ 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. 21. Which two benefits does the IPS version 5.x signature format provide over the version 4.x signature format? (Choose two.) A network-based IPS sensor has pushed an alert to a host running Cisco Security Agent. 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. 乐档网，我分享,我快乐! http://www.ledlh.cn/ 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 乐档网-提供各行各业及小学、初中、高中、高等教育、工程科技、工程管理、 职场、商业合同等文档范文下载，所有范文免费分享，是您下载范文的首选网 站。 乐档网 http://www.ledlh.cn/ What is the purpose of configuring the IOS IPS crypto key when IOS IPS is enabled on a Cisco router?What is the purpose in configuring an IOS IPS crypto key when enabling IOS IPS on a Cisco router? Explanation: The crypto key verifies the digital signature for the master signature file (sigdef-default. xml). The content of the file is signed by a Cisco private key to guarantee its authenticity and integrity.
What are advantages of network based IPS choose two?Table 6-5. Advantages and Limitations of Host-Based IPS and Network-Based IPS. What is Cisco IOS IPS?Cisco IOS IPS allows you to manage intrusion prevention on routers that use Cisco IOS Software Release 12.3(8)T4 or later. Cisco IOS IPS monitors and prevents intrusions by comparing traffic against signatures of known threats and blocking the traffic when a threat is detected.
What is an IPS signature Cisco?Cisco IOS IPS uses a Parallel Signature Scanning Engine to scan for multiple patterns within a signature micro-engine (SME) at any given time. IPS signatures are no longer scanned on a serial basis.
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Refer to the exhibit. what is the result of issuing the cisco ios ips commands on router r1?
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