cisco网络安全答案1

1.What is a ping sweep?A ping sweep is a network scanning technique that indicates the live hosts in a range of IP addresses.A ping sweep is a software application that enables the capture of all network packets sent across a LAN.A ping sweep is a scanning technique that examines a range of TCP or UDP port numbers on a host to detect listening serA ping sweep is a query and response protocol that identifies information about a domain, including the addresses assignedomain.Observable DescriptionMaxValueEarnedValue1 correctness ofresponse2 points for Option 10 points for any otheroption2 22Which access attack method involves a software program attempting to discover a system password by using an electronic dict buffer overflow attackport redirection attackDenial of Service attackbrute-force attackIP spoofing attackpacket sniffer attackObservable DescriptionMaxValueEarnedValue1 correctness ofresponse2 points for Option 40 points for any otheroption2 03How is a Smurf attack conducted?by sending a large number of packets, overflowing the allocated buffer memory of the target deviceby sending an echo request in an IP packet larger than the maximum packet size of 65,535 bytesby sending a large number of ICMP requests to directed broadcast addresses from a spoofed source address on the sam by sending a large number of TCP SYN packets to a target device from a spoofed source addressObservable DescriptionMaxValueEarnedValue1 correctness ofresponse2 points for Option 30 points for any otheroption2 24A port scan is classified as what type of attack?access attackDenial of Service attackreconnaissance attackspoofing attackObservable DescriptionMaxValueEarnedValue1 correctness ofresponse2 points for Option 30 points for any otheroption2 05What are the basic phases of attack that can be used by a virus or worm in sequential order?paralyze, probe, penetrate, persist, and propagateprobe, penetrate, persist, propagate, and paralyzepenetrate, persist, propagate, paralyze, and probepersist, propagate, paralyze, probe, and penetrateObservableDescriptionMaxValueEarnedValue1 correctness ofresponse2 points for Option 20 points for any otheroption2 06What are the three major components of a worm attack? (Choose three.) enabling vulnerabilityinfecting vulnerabilitypayloadpenetration mechanismprobing mechanismpropagation mechanismObservable DescriptionMaxValueEarnedValue1 correctness ofresponseOption 1, Option 3, and Option 6are correct.1 point for each correct option.0 points if more options areselected than required.3 17Which type of software typically uses a network adapter card in promiscuous mode to capture all network packets that are sent a port scannerping sweeperpacket snifferInternet information queryObservableDescriptionMax ValueEarned Value1correctness of response2 points for Option3 0 points for any other option28An attacker is using a laptop as a rogue access point to capture all network traffic from a targeted user. Which type of attack itrust exploitationbuffer overflowman in the middleport redirectionObservableDescriptionMax ValueEarned Value1correctness of response2 points for Option3 0 points for any other option29Which three options describe the phases of worm mitigation? (Choose three.)The containment phase requires the use of incoming and outgoing ACLs on routers and firewalls.The containment phase tracks down and identifies the infected machines within the contained areas.The inoculation phase disconnects, blocks, or removes infected machines.The inoculation phase patches uninfected systems with the appropriate vendor patch for the vulnerability. The quarantine phase terminates the worm process, removes modified files or system settings, and patches the vulnera used to exploit the system.The treatment phase disinfects actively infected systems.Observable DescriptionMaxValueEarnedValue1 correctness ofresponseOption 1, Option 4, and Option 6are correct.1 point for each correct option.0 points if more options areselected than required.3 110Which phase of worm mitigation requires compartmentalization and segmentation of the network to slow down or stop the wor currently infected hosts from targeting and infecting other systems?containment phaseinoculation phasequarantine phasetreatment phaseObservable DescriptionMaxValueEarnedValue1 correctness ofresponse2 points for Option 10 points for any otheroption2 011What is a characteristic of a Trojan Horse?A Trojan Horse can be carried in a virus or worm.A proxy Trojan Horse opens port 21 on the target system.An FTP Trojan Horse stops anti-virus programs or firewalls from functioning.A Trojan Horse can be hard to detect because it closes when the application that launched it closes.ObservableDescriptionMax Value1 correctness of response2 points for Option 10 points for any other option212Which two statements are characteristics of a virus? (Choose two.)A virus typically requires end-user activation.A virus has an enabling vulnerability, a propagation mechanism, and a payload.A virus replicates itself by independently exploiting vulnerabilities in networks.A virus provides the attacker with sensitive data, such as passwords.A virus can be dormant and then activate at a specific time or date.Observable DescriptionMaxValueEarnedValue1 correctness ofresponseOption 1 and Option 5 are correct.1 point for each correct option.0 points if more options areselected than required.2 013Which two are characteristics of DoS attacks? (Choose two.)They always precede access attacks.They attempt to compromise the availability of a network, host, or application.They are difficult to conduct and are initiated only by very skilled attackers.They are commonly launched with a tool called L0phtCrack.Examples include smurf attacks and ping of death attacks.Observable DescriptionMax Value1correctness ofresponseOption 2 and Option 5 are correct.1 point for each correct option.0 points if more options are selected thanrequired.214Which two statements describe access attacks? (Choose two.)Port redirection attacks use a network adapter card in promiscuous mode to capture all network packets that are sent acPassword attacks can be implemented using brute-force attack methods, Trojan Horses, or packet sniffers. Buffer overflow attacks write data beyond the allocated buffer memory to overwrite valid data or exploit systems to execu code.Port scanning attacks scan a range of TCP or UDP port numbers on a host to detect listening services. Trust exploitation attacks can use a laptop acting as a rogue access point to capture and copy all network traffic in a pub a wireless hotspot.ObservableDescriptionMax Value1correctness of responseOption 2 and Option 3 are correct.1 point for each correct option.0 points if more options are selected than required.215A disgruntled employee is using Wireshark to discover administrative Telnet usernames and passwords. What type of networthis describe?Denial of Serviceport redirectionreconnaissancetrust exploitationObservableDescriptionMax Value1 correctness of response2 points for Option3 0 points for any other option216Which two network security solutions can be used to mitigate DoS attacks? (Choose two.)virus scanningdata encryptionanti-spoofing technologiesintrusion protection systemsapplying user authenticationObservableDescriptionMax Value1correctness of responseOption 3 and Option 4 are correct.1 point for each correct option.0 points if more options are selected than required.217This item references content from the following areas: CCNA Security: Implementing Network Security1.2.1 VirusesUsers report to the helpdesk that icons usually seen on the menu bar are randomly appearing on their c reason that computers are displaying these random graphics?An access attack has occurred.A virus has infected the computers.A DoS attack has been launched against the network.The computers are subject to a reconnaissance attack.ObservableDescriptionMax Value1 correctness of response2 points for Option 220 points for any other option18A network administrator detects unknown sessions involving port 21 on the network. What could be causing this security breaAn FTP Trojan Horse is executing.A reconnaissance attack is occurring.A denial of service attack is occurring.Cisco Security Agent is testing the network.Observable Description Max Value1 correctness of response2 points for Option 10 points for any other option219Which statement accurately characterizes the evolution of network security?Internal threats can cause even greater damage than external threats.Internet architects planned for network security from the beginning.Early Internet users often engaged in activities that would harm other users.Threats have become less sophisticated while the technical knowledge needed by an attacker has grown.Observable Description Max Value1 correctness of response2 points for Option 10 points for any other option220What is considered a valid method of securing the control plane in the Cisco NFP framework?authorization of actionsDHCP snoopingdynamic ARP inspectionlogin and password policy routing protocol authentication role-based access controlObservableDescriptionMax Value1 correctness of response2 points for Option 50 points for any other option221What are two reasons for securing the data plane in the Cisco NFP framework? (Choose two.) to protect against DoS attacksto provide bandwidth controlto force technicians to use SSH and HTTPS when managing devicesto provide a record of who accessed the device, what occurred, and when it occurredto allow users to control the flow of traffic that is managed by the route processor of their network devicesObservable DescriptionMax Value1 correctness ofresponseOption 1 and Option 2 are correct.1 point for each correct option.0 points if more options are selected thanrequired.222Which type of security threat can be described as software that attaches to another program to execute a specific unwanted f viruswormproxy Trojan HorseDenial of Service Trojan HorseObservable Description Max Value1 correctness of response2 points for Option 10 points for any other option2。