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 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 appearing on their computer screens. What could be a 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.
4. What are three types of access attacks? (Choose three.)
buffer overflow ping sweep
port redirection trust exploitation port scan
Internet information query
5. 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 unavailable to intended users.
Improperly formatted packets are forwarded to a target device to cause the target system to crash.
A program writes data beyond the allocated memory to enable the execution of malicious code.
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 launched it closes.
7. Which phase of worm mitigation requires compartmentalization and segmentation of the network to slow down or stop the worm and prevent currently infected hosts from targeting and infecting other systems?
containment phase inoculation phase
quarantine phase treatment phase
8. 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 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 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 that attaches to another program to execute a specific
unwanted function?
virus worm
proxy Trojan horse
Denial of Service Trojan horse
11. A disgruntled employee is using Wireshark to discover administrative
Telnet usernames and passwords. What type of network attack does this describe?
Denial of Service port redirection reconnaissance trust exploitation
12. What occurs during the persist phase of a worm attack?
identification of vulnerable targets
modification of system files and registry settings to ensure that the
attack code is running
transfer of exploit code through an attack vector extension of the attack to vulnerable neighboring targets
13. What are the three major components of a worm attack? (Choose three.)
enabling vulnerability infecting vulnerability payload
penetration mechanism probing mechanism propagation mechanism
14. A network administrator detects unknown sessions involving port 21 on the
network. What could 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 services determine potential vulnerabilities identify active services
identify peripheral configurations identify operating systems
discover system passwords
16. How is a Smurf attack conducted?
by sending a large number of packets, overflowing the allocated buffer memory of the target device
by sending an echo request in an IP packet larger than the maximum packet size of 65,535 bytes
by sending a large number of ICMP requests to directed broadcast
addresses from a spoofed source address on the same network
by sending a large number of TCP SYN packets to a target device from a spoofed source address
17. Which access attack method involves a software program attempting to
discover a system password by using an electronic dictionary?
buffer overflow attack port redirection attack