Ccna Security

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Cisco CCNA Security, chapter 1 Exam. Questions and answers 100% correct. 1. What are the basic phases of attack that can be used by a virus or worm in sequential order? paralyze, probe, penetrate, persist, and propagate probe, penetrate, persist, propagate, and paralyze penetrate, persist, propagate, paralyze, and probe persist, propagate, paralyze, probe, and penetrate 2. Which two are characteristics of DoS attacks? (Choose two.) They always precede access attacks. They attempt to compromise t
  Cisco CCNA Security, chapter 1 Exam. Questions and answers 100% correct. 1. What 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 penetrate2. Which 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.3. Users report to the helpdesk that icons usually seen on the menu bar are randomly appearingon their computer screens. What could be a reason that computers are displaying these randomgraphics?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.4. What are three types of access attacks? (Choose three.)buffer overflowping sweepport redirectiontrust exploitationport scanInternet information query5. What occurs during a spoofing attack?One device falsifies data to gain access to privileged information.Large amounts of network traffic are sent to a target device to make resources unavailableto intended users.Improperly formatted packets are forwarded to a target device to cause the target system tocrash.   A program writes data beyond the allocated memory to enable the execution of maliciouscode.6. What 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 launchedit closes.7. Which phase of worm mitigation requires compartmentalization and segmentation of thenetwork to slow down or stop the worm and prevent currently infected hosts from targetingand infecting other systems?containment phaseinoculation phasequarantine phasetreatment phase8. Which 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.9. What is a ping sweep?A ping sweep is a network scanning technique that indicates the live hosts in a range of IPaddresses.A ping sweep is a software application that enables the capture of all network packets sentacross a LAN.A ping sweep is a scanning technique that examines a range of TCP or UDP port numberson a host to detect listening services.A ping sweep is a query and response protocol that identifies information about a domain,including the addresses assigned to that domain.10. Which type of security threat can be described as software that attaches to another programto execute a specific unwanted function?viruswormproxy Trojan horse   Denial of Service Trojan horse11. A disgruntled employee is using Wireshark to discover administrative Telnet usernames andpasswords. What type of network attack does this describe?Denial of Serviceport redirectionreconnaissancetrust exploitation12. What occurs during the persist phase of a worm attack?identification of vulnerable targetsmodification of system files and registry settings to ensure that the attack code is runningtransfer of exploit code through an attack vectorextension of the attack to vulnerable neighboring targets13. What are the three major components of a worm attack? (Choose three.)enabling vulnerabilityinfecting vulnerabilitypayloadpenetration mechanismprobing mechanismpropagation mechanism14. A network administrator detects unknown sessions involving port 21 on the network. Whatcould be causing this security breach?An FTP Trojan Horse is executing.A reconnaissance attack is occurring.A denial of service attack is occurring.Cisco Security Agent is testing the network.15. What are three goals of a port scan attack? (Choose three.)disable used ports and servicesdetermine potential vulnerabilitiesidentify active servicesidentify peripheral configurationsidentify operating systemsdiscover system passwords16. How is a Smurf attack conducted?   by sending a large number of packets, overflowing the allocated buffer memory of thetarget 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 aspoofed source address on the same network by sending a large number of TCP SYN packets to a target device from a spoofed sourceaddress17. Which access attack method involves a software program attempting to discover a systempassword by using an electronic dictionary?buffer overflow attack port redirection attack Denial of Service attack brute-force attack IP spoofing attack packet sniffer attack 18 Which two network security solutions can be used to mitigate DoS attacks? (Choose two.)virus scanningdata encryptionanti-spoofing technologiesintrusion protection systemsapplying user authentication19. Which phase of worm mitigation involves terminating the worm process, removing modifiedfiles or system settings that the worm introduced, and patching the vulnerability that theworm used to exploit the system?containmentinoculationquarantinetreatment20. Which characteristic best describes the network security Compliance domain as specified bythe ISO/IEC?the integration of security into applicationsan inventory and classification scheme for information assetsthe restriction of access rights to networks, systems, applications, functions, and datathe process of ensuring conformance with security information policies, standards, andregulations
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