Ccna Security Chapter 1 Assessment

Take Assessment - CCNAS Chapter 1 - CCNA Security: Implementing Network Security (Version 1.0)

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1 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.

2 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.

3 Which type of software typically uses a network adapter card in promiscuous mode to capture all network packets that are sent across a LAN? port scanner ping sweeper ()packet sniffer Internet information query

4 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

5 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.

6 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.

7 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.

8 Which technology is an example of a host-based intrusion prevention system? MARS NAC ()CSA VPN

9 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.

10 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

11 An attacker is using a laptop as a rogue access point to capture all network traffic from a targeted user. Which type of attack is this? trust exploitation buffer overflow ()man in the middle port redirection

12 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

13 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

14 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

15 What are three types of access attacks? (Choose three.) ()buffer overflow ping sweep ()port redirection ()trust exploitation port scan Internet information query 16 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

17 Which type of security threat can be described as software that attaches to another program to execute a specific unwanted function? ()virus worm proxy Trojan horse Denial of Service Trojan horse

18 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

19 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.

20 What are the three major components of a worm attack? (Choose three.) enabling vulnerability () infecting vulnerability payload () penetration mechanism probing mechanism propagation mechanism ()

Implementing Network Security Chapter 1: Modern Network Security Threats 1.1 Fundamental Principles of a Secure Network 1.2 Viruses, Worms, and Trojan Horses 1.2.1 Viruses 1.2.2 Worms () 1.2.3 Trojan Horses() 1.2.4 Mitigating Viruses, Worms, and Trojan Horses () 1.3 Attack Methodologies 1.3.1 Reconnaissance Attacks() 1.3.2 Access Attacks () 1.3.3 Denial of Service Attacks 1.3.4 Mitigating Network Attacks 1.4 Chapter Summary Chapter 2: Securing Network Devices Chapter 3: Authentication, Authorization, and Accounting Chapter 4: Implementing Firewall Technologies Chapter 5: Implementing Intrusion Prevention Chapter 6: Securing the Local Area Network Chapter 7: Cryptographic Systems Chapter 8: Implementing Virtual Private Networks Chapter 9: Managing a Secure Network