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NEW QUESTION # 29
How many IPsec modes are there?
- A. Two
- B. Four
- C. Three
- D. None of these
Answer: A
Explanation:
IPsec (Internet Protocol Security) primarily operates in two modes: Transport mode and Tunnel mode.
Transport mode: Encrypts only the payload of each packet, leaving the header untouched. This mode is typically used for end-to-end communication between two systems.
Tunnel mode: Encrypts both the payload and the header of each IP packet, which is then encapsulated into a new IP packet with a new header. Tunnel mode is often used for network-to-network communications (e.g., between two gateways) or between a remote client and a gateway.
Reference
"Security Architecture for the Internet Protocol," RFC 4301.
"IPsec Modes of Operation," by Internet Engineering Task Force (IETF).
NEW QUESTION # 30
What type of protocol is considered connection-oriented?
- A. ICMP
- B. TCP
- C. UDP
- D. ARP
Answer: B
Explanation:
TCP (Transmission Control Protocol) is a connection-oriented protocol used in the majority of internet communications.
Connection-oriented protocols like TCP require a connection to be established between the communicating devices before data is transmitted. This ensures reliable and ordered delivery of data.
TCP manages this by establishing a handshake mechanism (TCP three-way handshake) to set up the connection prior to transmitting data and properly terminating the connection once the communication session has completed.
Reference
"TCP/IP Illustrated, Volume 1: The Protocols" by W. Richard Stevens.
Postel, J., "Transmission Control Protocol," RFC 793.
NEW QUESTION # 31
The vulnerability that led to the WannaCry ransomware infections affected which protocol?
- A. SMB
- B. None of these
- C. RPC
- D. Samba
Answer: A
Explanation:
WannaCry is a ransomware attack that spread rapidly across multiple computer networks in May 2017.
The vulnerability exploited by the WannaCry ransomware was in the Microsoft Windows implementation of the Server Message Block (SMB) protocol.
Specifically, the exploit, known as EternalBlue, targeted a flaw in the SMBv1 protocol. This flaw allowed the ransomware to spread within corporate networks without any user interaction, making it one of the fastest-spreading and most harmful cyberattacks at the time.
Reference
Microsoft Security Bulletin MS17-010 - Critical: https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2017/ms17-010 National Vulnerability Database, CVE-2017-0144: https://nvd.nist.gov/vuln/detail/CVE-2017-0144
NEW QUESTION # 32
With respect to the IEC 62443, how many steps are in the Defense in Depth process?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
IEC 62443 is a series of standards designed to secure Industrial Automation and Control Systems (IACS). It provides a framework for implementing cybersecurity measures in the context of industrial environments.
The Defense in Depth (DiD) approach outlined in IEC 62443 involves multiple layers of security measures to protect industrial networks. This method ensures that if one layer fails, others are in place to continue protection.
Specifically, the IEC 62443 framework describes six fundamental steps in setting up a Defense in Depth strategy, covering aspects from physical security to network segmentation and device hardening.
Reference
International Electrotechnical Commission, IEC 62443 Series.
"Understanding IEC 62443 for Industrial Cybersecurity," by ISA99 Committee.
The IEC 62443 standard outlines a comprehensive framework for securing industrial automation and control systems (IACS). The Defense in Depth concept within this standard includes six steps designed to ensure robust security.
Step 1: Identification and Authentication Control (IAC): Ensuring only authorized users and devices can access the system.
Step 2: Use Control (UC): Managing permissions and access controls to restrict actions users can perform.
Step 3: System Integrity (SI): Ensuring the system remains in a trustworthy state, protected from unauthorized changes.
Step 4: Data Confidentiality (DC): Protecting sensitive data from unauthorized access and disclosure.
Step 5: Restricted Data Flow (RDF): Controlling and monitoring data flows to prevent unauthorized data transmission.
Step 6: Timely Response to Events (TRE): Implementing mechanisms to detect, respond to, and recover from security incidents.
These steps collectively form the Defense in Depth strategy prescribed by IEC 62443.
Reference
"IEC 62443 - Industrial Automation and Control Systems Security," International Electrotechnical Commission, IEC 62443.
"Defense in Depth," Cybersecurity and Infrastructure Security Agency (CISA), Defense in Depth.
NEW QUESTION # 33
Which of the following steps is used to reveal the IP addressing?
- A. Surveillance
- B. Cover your tracks
- C. Footprinting
- D. Enumeration
Answer: D
Explanation:
Enumeration is a step in the information-gathering phase of a penetration test or cyber attack where an attacker actively engages with the target to extract detailed information, including IP addressing.
Enumeration: During enumeration, the attacker interacts with network services to gather information such as user accounts, network shares, and IP addresses.
Techniques: Common techniques include using tools like Nmap, Netcat, and Nessus to scan for open ports, services, and to identify the IP addresses in use.
Purpose: The goal is to map the network's structure, find potential entry points, and understand the layout of the target environment.
Because enumeration involves discovering detailed information including IP addresses, it is the correct answer.
Reference
"Enumeration in Ethical Hacking," GeeksforGeeks, Enumeration.
"Network Enumeration," Wikipedia, Network Enumeration.
NEW QUESTION # 34
What does the SPI within IPsec identify?
- A. Security Association
- B. Decryption algorithm
- C. All of these
- D. Key Exchange
Answer: A
Explanation:
Within IPsec, the SPI (Security Parameter Index) is a critical component that uniquely identifies a Security Association (SA) for the IPsec session. The SPI is used in the IPsec headers to help the receiving party determine which SA has been agreed upon for processing the incoming packets. This identification is crucial for the proper operation and management of security policies applied to the encrypted data flows.
Reference:
RFC 4301, "Security Architecture for the Internet Protocol," which discusses the structure and use of the SPI in IPsec communications.
NEW QUESTION # 35
What is a vulnerability called that is released before a patch comes out?
- A. Zero day
- B. Initial
- C. First
- D. Pre-release
Answer: A
Explanation:
A vulnerability that is exploited before the vendor has issued a patch or even before the vulnerability is known to the vendor is referred to as a "zero-day" vulnerability. The term "zero-day" refers to the number of days the software vendor has had to address and patch the vulnerability since it was made public-zero, in this case.
Reference:
Symantec Security Response, "Zero Day Initiative".
NEW QUESTION # 36
Which mode within IPsec provides secure connection between two endpoints but does NOT protect the sender and the receiver?
- A. Tunnel
- B. Protected
- C. Covered
- D. Transport
Answer: D
Explanation:
IPsec offers two modes of operation: Transport mode and Tunnel mode.
Transport mode in IPsec provides security for the payload (the message part) of each packet along the communication path between two endpoints.
In this mode, the IP header of the original packet is not encrypted; it secures only the payload, not protecting the headers. This means while the data is protected, information about the sender and receiver as contained in the IP header is not obscured.
Reference
"Security Architecture for IP," RFC 4301.
IPsec documentation, Internet Engineering Task Force (IETF).
NEW QUESTION # 37
Which of the registrars contains the information for the domain owners in South America?
- A. LACNIC
- B. ARIN
- C. AFRINIC
- D. RIPENCC
Answer: A
Explanation:
LACNIC (Latin American and Caribbean Network Information Centre) is the regional Internet registry for Latin America and parts of the Caribbean. It manages the allocation and registration of Internet number resources (such as IP addresses and AS numbers) within this region and maintains the registry of domain owners in South America.
Reference:
LACNIC official website, "About LACNIC".
NEW QUESTION # 38
Which of the following are required functions of information management?
- A. Date enrichment
- B. All of these
- C. Normalization
- D. Correlation
Answer: B
Explanation:
Information management within the context of network security involves several critical functions that ensure data is correctly handled for security operations. These functions include:
Normalization: This process standardizes data formats from various sources to a common format, making it easier to analyze systematically.
Correlation: This function identifies relationships between disparate pieces of data, helping to identify patterns or potential security incidents.
Data enrichment: Adds context to the collected data, enhancing the information with additional details, such as threat intelligence.
All these functions are essential to effective information management in security systems, allowing for more accurate monitoring and faster response to potential threats.
Reference
"Data Enrichment and Correlation in SIEM Systems," Security Information Management Best Practices.
"Normalization Techniques for Security Data," Journal of Network Security.
NEW QUESTION # 39
Which mode within IPsec provides a secure connection tunnel between two endpoints AND protects the sender and the receiver?
- A. Tunnel
- B. Protected
- C. Covered
- D. Transport
Answer: A
Explanation:
IPsec (Internet Protocol Security) has two modes: Transport mode and Tunnel mode.
Tunnel mode is used to create a secure connection tunnel between two endpoints (e.g., two gateways, or a client and a gateway) and it encapsulates the entire IP packet.
This mode not only protects the payload but also the header information of the original IP packet, thereby providing a higher level of security compared to Transport mode, which only protects the payload.
Reference
Kent, S. and Seo, K., "Security Architecture for the Internet Protocol," RFC 4301, December 2005.
"IPsec Services," Microsoft TechNet.
NEW QUESTION # 40
Who developed the ModBus protocol?
- A. Siemens
- B. Modicon
- C. Motorola
- D. BAG
Answer: B
Explanation:
The Modbus protocol was developed by Modicon, now a brand of Schneider Electric.
It was originally designed in 1979 for use with its programmable logic controllers (PLCs) in industrial applications.
Modbus is a serial communications protocol that has become a de facto standard communication protocol and is now commonly used to connect industrial electronic devices. The main reasons for its use are its simplicity and the fact that it is open-source, which allows manufacturers to build their own implementations of the standard.
Reference
"Modbus Protocol Reference Guide," Modicon, Inc., 1979.
"A Guide to the Modbus Protocol," Schneider Electric.
NEW QUESTION # 41
A Security Association is a __________ way connection?
- A. One
- B. Two
- C. Three
- D. None of these
Answer: A
Explanation:
A Security Association (SA) in the context of IPsec is a one-way logical connection used for secure communication between two endpoints. IPsec requires two SAs to establish a secure, bidirectional communication channel-one for each direction (inbound and outbound). This arrangement ensures that each direction is independently secured, with its own set of security parameters.
Reference:
RFC 4301, "Security Architecture for the Internet Protocol".
NEW QUESTION # 42
Which of the following names represents inbound filtering?
- A. Ingress
- B. Funnel
- C. Sanity
- D. Egress
Answer: A
Explanation:
Ingress filtering is a method used in network security to ensure that incoming packets are allowed or blocked based on a set of security rules.
This type of filtering is often implemented at the boundaries of networks to prevent unwanted or harmful traffic from entering a more secure internal network.
The term "ingress" refers to traffic that is entering a network boundary, whereas "egress" refers to traffic exiting a network.
Reference
Cisco Networking Academy Program: Network Security.
"Understanding Ingress and Egress Filtering," Network Security Guidelines, TechNet.
NEW QUESTION # 43
Which component of the IT Security Model is attacked with masquerade?
- A. Confidentiality
- B. Integrity
- C. Authentication
- D. Availability
Answer: C
Explanation:
A masquerade attack involves an attacker pretending to be an authorized user of a system, thus compromising the authentication component of the IT security model. Authentication ensures that the individuals accessing the system are who they claim to be. By masquerading as a legitimate user, an attacker can bypass this security measure and gain unauthorized access to the system.
Reference:
William Stallings, "Security in Computing".
NEW QUESTION # 44
What step of the malware infection installs the malware on the target?
- A. Stager
- B. Drive-by
- C. Dropper
- D. Init
Answer: C
Explanation:
The term "Dropper" in cybersecurity refers to a small piece of software used in malware deployment that is designed to install or "drop" malware (like viruses, ransomware, spyware) onto the target system.
The Dropper itself is not typically malicious in behavior; however, it is used as a vehicle to install malware that will perform malicious activities without detection.
During the infection process, the Dropper is usually the first executable that runs on a system. It then unpacks or downloads additional malicious components onto the system.
Reference
Common Malware Enumeration (CME): http://cme.mitre.org
Microsoft Malware Protection Center: https://www.microsoft.com/en-us/wdsi
NEW QUESTION # 45
Which of the registrars contains the information for the domain owners in Latin America?
- A. LACNIC
- B. ARIN
- C. AFRINIC
- D. RIPENCC
Answer: A
Explanation:
LACNIC, the Latin American and Caribbean Internet Addresses Registry, is the regional internet registry (RIR) responsible for allocating and administering IP addresses and Autonomous System Numbers (ASNs) in Latin America and the Caribbean.
Function: LACNIC manages the distribution of internet number resources (IP addresses and ASNs) in its region, maintaining the registry of domain owners and other related information.
Coverage: The organization covers over 30 countries in Latin America and the Caribbean, including countries like Brazil, Argentina, Chile, and Mexico.
Services: LACNIC provides a range of services including IP address allocation, ASN allocation, reverse DNS, and policy development for internet resource management in its region.
Given this role, LACNIC is the correct answer for the registrar that contains information for domain owners in Latin America.
Reference
"About LACNIC," LACNIC, LACNIC Overview.
"Regional Internet Registries," Wikipedia, Regional Internet Registries.
NEW QUESTION # 46
Which of the IEC 62443 security levels is identified by a hacktivist/terrorist target?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
IEC 62443 defines multiple security levels (SLs) tailored to address different types of threats and attackers in industrial control systems.
Security Level 4 (SL4) is designed to protect against sophisticated attacks by adversaries such as hacktivists or terrorists. SL4 involves threats that are targeted with specific intent against the organization, using advanced skills and means.
This level assumes that the adversary is capable of sustained and focused efforts with significant resources, including state-level actors or well-funded groups, aiming at causing widespread disruption or damage.
Reference
IEC 62443-3-3: System security requirements and security levels.
"Industrial Network Security: Securing Critical Infrastructure Networks for Smart Grid, SCADA, and Other Industrial Control Systems," by Eric Knapp.
NEW QUESTION # 47
Which of the TCP flags represents data in the packet?
- A. FIN
- B. RST
- C. PSH
- D. ACK
Answer: C
Explanation:
The PSH (Push) flag in the TCP header instructs the receiving host to push the data to the receiving application immediately without waiting for the buffer to fill. This is used to ensure that data is not delayed, thus improving the efficiency of communication where real-time data processing is required. It effectively tells the system that the data in the packet should be considered urgent.
Reference:
Douglas E. Comer, "Internetworking with TCP/IP Vol.1: Principles, Protocols, and Architecture".
NEW QUESTION # 48
How many main score areas are there in the CVSS?2
- A. 0
- B. 1
- C. None of these
- D. 2
Answer: D
Explanation:
The Common Vulnerability Scoring System (CVSS) is a framework for rating the severity of security vulnerabilities. CVSS provides three main score areas: Base, Temporal, and Environmental.
Base Score evaluates the intrinsic qualities of a vulnerability.
Temporal Score reflects the characteristics of a vulnerability that change over time.
Environmental Score considers the specific impact of the vulnerability on a particular organization, tailoring the Base and Temporal scores according to the importance of the affected IT asset.
Reference:
FIRST, "Common Vulnerability Scoring System v3.1: Specification Document".
NEW QUESTION # 49
How many IPsec rules are there in Microsoft Firewall configuration?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
In the configuration of Microsoft Windows Firewall with Advanced Security, you can define IPsec rules as part of your security policy. Typically, these rules can be organized into four main categories: Allow connection, Block connection, Allow if secure (which can specify encryption or authentication requirements), and Custom. While the interface and features can vary slightly between Windows versions, four fundamental types of rules regarding how traffic is handled are commonly supported.
Reference:
Microsoft documentation, "Windows Firewall with Advanced Security".
NEW QUESTION # 50
Which of the ICS/SCADA generations is considered networked?
- A. Third
- B. First
- C. Fourth
- D. Second
Answer: A
NEW QUESTION # 51
A protocol analyzer that produces raw output is which of the following?
- A. Capsa
- B. Commview
- C. tcpdump
- D. Wireshark
Answer: C
Explanation:
tcpdump is a powerful command-line packet analyzer used primarily in UNIX and UNIX-like operating systems; it allows the capture and display of TCP/IP and other packets being transmitted or received over a network to which the computer is attached.
Unlike graphical tools like Wireshark, tcpdump provides raw output of the packet captures directly to the terminal or a specified file, making it ideal for deep dive network analysis, especially in environments where a graphical user interface is unavailable.
tcpdump uses the libpcap library to capture packet data, which allows it to support a wide range of command-line options to filter and display packet information according to user needs.
Reference
"tcpdump manual page," by the Tcpdump Group.
"Practical Packet Analysis Using Wireshark to Solve Real-World Network Problems," by Chris Sanders, No Starch Press.
NEW QUESTION # 52
Which of the following is the stance that by default has a default deny approach?
- A. Paranoid
- B. Promiscuous
- C. Permissive
- D. Prudent
Answer: A
Explanation:
In the context of network security policies, a "Paranoid" stance typically means adopting a default-deny posture. This security approach is one of the most restrictive, where all access is blocked unless explicitly allowed.
A default deny strategy is considered best practice for securing highly sensitive environments, as it minimizes the risk of unauthorized access and reduces the attack surface.
This approach contrasts with more open stances such as Permissive or Promiscuous, which are less restrictive and generally allow more traffic by default.
Reference
"Network Security: Policies and Guidelines for Effective Network Management," by Jonathan Gossels.
"Best Practices for Implementing a Security Awareness Program," by Kaspersky Lab.
NEW QUESTION # 53
Which of the following can be used to view entire copies of web sites?
- A. Bing offline
- B. Netcraft
- C. Google Cache
- D. Wayback machine
Answer: D
Explanation:
The Wayback Machine is an internet service provided by the Internet Archive that allows users to see archived versions of web pages across time, enabling them to browse past versions of a website as it appeared on specific dates.
It captures and stores snapshots of web pages, making it an invaluable tool for accessing the historical state of a website or recovering content that has since been changed or deleted.
Other options like Google Cache may also show snapshots of web pages, but the Wayback Machine is dedicated to this purpose and holds a vast archive of historical web data.
Reference
Internet Archive: https://archive.org
"Using the Wayback Machine," Internet Archive Help Center.
NEW QUESTION # 54
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