Exam Results- CCNAS Chapter 1- CCNA Security Implementing Network Security- Version 1.0.0.0

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

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 scanning data encryption

anti-spoofing technologies intrusion protection systems applying user authentication

19. Which phase of worm mitigation involves terminating the worm process,

removing modified files or system settings that the worm introduced, and patching the vulnerability that the worm used to exploit the system?

containment inoculation quarantine treatment

20. Which characteristic best describes the network security Compliance

domain as specified by the ISO/IEC?

the integration of security into applications

an inventory and classification scheme for information assets the restriction of access rights to networks, systems, applications, functions, and data

the process of ensuring conformance with security information policies,

standards, and regulations

21. Which statement describes phone freaking?

A hacker uses password-cracking programs to gain access to a computer via a dialup account.

A hacker gains unauthorized access to networks via wireless access points.

A hacker mimics a tone using a whistle to make free long-distance calls

on an analog telephone network.

A hacker uses a program that automatically scans telephone numbers within a local area, dialing each one in search of computers, bulletin board systems, and fax machines.

22. Which 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 across a LAN. Password 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 execute malicious 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 public location on a wireless hotspot.

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