Cisco Chapter 5 Test Answers
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- A network administrator is configuring an IOS IPS with the command R1 config ip ips signature-definition Which configuration task can be achieved with this command? Retire or unretire the all atomic signatures category. Retire or unretire an...
- However, an IPS sensor cannot maintain the state information indefinitely. A composite signature is configured with a time period to maintain the state for the specific attack when it is first detected. Thus, an IPS may not be able to maintain all...
- True or False? A Cisco IDS does not affect the flow of traffic when it operates in promiscuous mode. What is a disadvantage of a pattern-based detection mechanism? The normal network traffic pattern must be profiled first. It is difficult to deploy in a large network. It cannot detect unknown attacks. Its configuration is complex. The signatures must be created first.
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Hence this type of intrusion detection cannot detect unknown attacks. It is easy to configure and to deploy. Its operation does not depend on the information of normal network behavior or baseline. A security specialist configures an IPS so that it will generate an alert when an attack is first detected. Alerts for the subsequent detection of the same attack are suppressed for a pre-defined period of time. Another alert will be generated at the end of the period indicating the number of the attack detected. Which IPS alert monitoring mechanism is configured? IPS solutions incorporate two types of alerts, atomic alerts and summary alerts. Atomic alerts are generated every time a signature triggers. A summary alert is a single alert that indicates multiple occurrences of the same signature from the same source address or port. With a summary alter, the first detection of the attack triggers a normal alert.- Subsequent detection of the same attack is counted until the end of the signature summary interval. When the length of time specified by the summary interval has elapsed, a summary alarm is sent, indicating the number of alarms that occurred during the time interval. What are two disadvantages of using an IDS? Choose two. The IDS does not stop malicious traffic. The IDS works offline using copies of network traffic.
- The IDS has no impact on traffic. The IDS analyzes actual forwarded packets. The IDS requires other devices to respond to attacks. The disadvantage of operating with mirrored traffic is that the IDS cannot stop malicious single-packet attacks from reaching the target before responding to the attack. Also, an IDS often requires assistance from other networking devices, such as routers and firewalls, to respond to an attack. An advantage of an IDS is that by working offline using mirrored traffic, it has no impact on traffic flow. Based on the IPS configuration provided, which conclusion can be drawn? The signatures in all categories will be retired and not be used by the IPS. The signatures in all categories will be compiled into memory and used by the IPS. The IPS signature in the all category is retired, which means no signatures are compiled into memory. What are two drawbacks to using HIPS? With HIPS, the network administrator must verify support for all the different operating systems used in the network.
- HIPS has difficulty constructing an accurate network picture or coordinating events that occur across the entire 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. Network-based IPS devices are implemented in inline mode to actively monitor the traffic on networks. They can be implemented with dedicated appliances or as a feature on a Cisco router. Multiple types of detection mechanisms can be implemented in IPS, including signature-based and anomaly-based detection. One limitation of an IPS is that it cannot monitor or inspect encrypted packets. Which two benefits does the IPS version 5. The new version supports encrypted signature parameters and other features such as signature risk rating, which rates the signature on security risk. What is the result after this configuration step?
- The router is authenticated with the Cisco secure IPS resource web server. This public key is used to verify digital signature for the master signature file, and can be downloaded from cisco. To configure the IOS IPS crypto key, open the text file, and copy and paste the contents to the router at the global configuration prompt. Traffic not matching ACL will be scanned and reported. Traffic matching ACL will be scanned and reported.
- Traffic that is sourced from Traffic that is coming from any source other than Traffic not matching ACL will be dropped. From the configuration, ACL is used to identify matching packets to be inspected. Which type of IPS signature detection is used to distract and confuse attackers? The purpose of the honey pot approach is to distract attacks away from real network devices. After capturing the attack activities on honeypot servers, network administrators can analyze incoming types of attacks and malicious traffic patterns. Cisco IPS Configuration A named ACL determines the traffic to be inspected. A system analyst is configuring and tuning a recently deployed IPS appliance.
- By examining the IPS alarm log, the analyst notices that the IPS does not generate alarms for a few known attack packets. Which term describes the lack of alarms by the IPS?
- The ARP table in a switch maps which two types of address together? Layer 3 address to a Layer 2 address Layer 3 address to a Layer 4 address Layer 4 address to a Layer 2 address Layer 2 address to a Layer 4 address Question Refer to the exhibit. In this scenario, what will happen next? A switch with a default configuration connects four hosts. The ARP table for host A is shown. What happens when host A wants to send an IP packet to host D? CCNA1 v6. Host A sends out the packet to the switch. The switch sends the packet only to the host D, which in turn responds. Every other host connected to the switch receives the broadcast and host D responds with its MAC address.
- The switches are in their default configuration. Which network hosts will receive the ARP request sent by host A? Question Which statement describes the treatment of ARP requests on the local link? They must be forwarded by all routers on the local network. They are received and processed by every device on the local network. They are dropped by all switches on the local network. They are received and processed only by the target device. Question What are two potential network problems that can result from ARP operation? Choose two. On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays. Large numbers of ARP request broadcasts could cause the host MAC address table to overflow and prevent the host from communicating on the network.
- Question Fill in the blank. A collision fragment, also known as a RUNT frame, is a frame of fewer than 64 bytes in length. On a Cisco switch, port-based memory buffering is used to buffer frames in queues linked to specific incoming and outgoing ports. Question Match the characteristic to the forwarding method. Not all options are used.
- Windows 8 Explanation: Windows 8 introduced the Metro user interface. The Windows 8. What is critical to consider when determining the version of Windows to install on a desktop computer? A user downloads and uses the Windows 7 Upgrade Advisor to generate a report on a PC that is being considered for an operating system upgrade. What information would the report contain? The report generated by the Upgrade Advisor utility not only points out the incompatibilities but also proposes possible resolutions to the problems identified. What are two features of the active partition of a hard drive that is using MBR? Choose two. The active partition must be a primary partition. Up to four primary partitions can be marked as active. An active partition must be assigned C: as the drive letter. The operating system uses the active partition to boot the system. The active partition may include the manufacturer recovery partition. Explanation: Under the MBR partition scheme standard, up to four partitions can be primary partitions, but only one of them can be marked as active.
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Even though the C: drive is normally the active partition, a computer could have another drive letter partition marked as active. The recovery partition is never used in normal operations as an active partition, but is used when no other means is possible to recover the operating system to the original configuration. A computer with the Windows 7 operating system fails to boot when the system is powered on. The technician suspects that the operating system has been attacked by a virus that rendered the system inoperable. What measure could be taken to restore system functionality? Use a differential backup to restore the system. Use an incremental backup to restore the system. Use a system image that was created prior to the failure to restore the system.- Run chkdsk on the affected drive to restore system files to their post-installation state. Explanation: The best way to restore an operating system that has been corrupted by a virus is to use a prior system image to conduct the restore. It is useful in troubleshooting errors caused by corruption of the physical disk surface and can also be used to check the integrity of various files and folders within the operating system.
- In order to use differential and incremental backups to restore the system you would also require the last full backup as well. What is the purpose of a recovery partition? The recovery partition is used to restore the computer to its factory state. However, all user data and applications installed after the computer was purchased are not restored. What Windows 8 tool allows the computer to be rolled back to its factory state without losing any user files?
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