ISC COPYRIGHT LATEST LEARNING MATERIAL, COPYRIGHT PRACTICE TESTS

ISC copyright Latest Learning Material, copyright Practice Tests

ISC copyright Latest Learning Material, copyright Practice Tests

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Tags: copyright Latest Learning Material, copyright Practice Tests, copyright Reliable Braindumps Pdf, Mock copyright Exams, copyright New Braindumps Files

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ISC copyright Security Professional (copyright) Sample Questions (Q1191-Q1196):

NEW QUESTION # 1191
When a flaw in Industrial control (ICS) software is discovered, what is the GREATEST impediment to deploying a patch?

  • A. Compensating controls may impact IG performance.
  • B. vendors are required to validate the operability patches.
  • C. Many IG systems have software that is no longer being maintained by the venders.
  • D. Testing a patch in an IG may require more resources than the organization can commit.

Answer: D

Explanation:
Industrial control systems (ICS) are critical for the operation of many sectors such as energy, transportation, manufacturing, and water. Patching ICS software is a challenging task because it may require extensive testing, validation, and coordination to ensure that the patch does not introduce new vulnerabilities, affect the functionality, performance, or availability of the system, or cause any adverse impacts on the physical processes or safety. Testing a patch in an ICS may require more resources than the organization can commit, such as time, personnel, equipment, or budget. Therefore, this is the greatest impediment to deploying a patch for ICS software. References: Recommended Practice for Patch Management of Control Systems, ICS Security Patching: Never, Next, Now, Patching and Change Management: copyright Domain 7


NEW QUESTION # 1192
The communication to an object to carry out an operation in an objectoriented system is called a:

  • A. Method.
  • B. Message.
  • C. Note.
  • D. Behavior.

Answer: B

Explanation:
Answer Note is a distracter.
A method is the code that defines the actions an object performs in response
to a messagE.
Behavior is the result exhibited by an object upon receipt of a message.


NEW QUESTION # 1193
Refer to the information below to answer the question.
A security practitioner detects client-based attacks on the organization's network. A plan will be necessary to address these concerns.
What MUST the plan include in order to reduce client-side exploitation?

  • A. Proxy configuration
  • B. Approved web browsers
  • C. Network firewall procedures
  • D. Employee education

Answer: D

Explanation:
The plan must include employee education in order to reduce client-side exploitation. Employee education is a process of providing the employees with the necessary knowledge, skills, and awareness to follow the security policies and procedures, and to prevent or avoid the common security threats or risks, such as client-side exploitation. Client-side exploitation is a type of attack that targets the vulnerabilities or weaknesses of the client applications or systems, such as web browsers, email clients, or media players, and that can compromise the client data or functionality, or allow the attacker to gain access to the network or the server. Employee education can help to reduce client-side exploitation by teaching the employees how to recognize and avoid the malicious or suspicious links, attachments, or downloads, how to update and patch their client applications or systems, how to use the security tools or features, such as antivirus or firewall, and how to report or respond to any security incidents or breaches. Approved web browsers, network firewall procedures, and proxy configuration are not the plan components that must be included in order to reduce client-side exploitation, as they are related to the technical or administrative controls or measures, not the human or behavioral factors, that can affect the client-side security. References: copyright All-in-One Exam Guide, Eighth Edition, Chapter 1, Security and Risk Management, page 47. Official (ISC)2 copyright CBK Reference, Fifth Edition, Chapter 1, Security and Risk Management, page 62.


NEW QUESTION # 1194
Which of the following is an extension to Network Address Translation that permits multiple devices providing services on a local area network (LAN) to be mapped to a single public
IP address?

  • A. IP Spoofing
  • B. IP subnetting
  • C. IP Distribution
  • D. Port address translation

Answer: D

Explanation:
Port Address Translation (PAT), is an extension to network address translation (NAT) that permits multiple devices on a local area network (LAN) to be mapped to a single public IP address. The goal of PAT is to conserve IP addresses or to publish multiple hosts with service to the internet while having only one single IP assigned on the external side of your gateway.
Most home networks use PAT. In such a scenario, the Internet Service Provider (ISP) assigns a single IP address to the home network's router. When Computer X logs on the
Internet, the router assigns the client a port number, which is appended to the internal IP address. This, in effect, gives Computer X a unique address. If Computer Z logs on the
Internet at the same time, the router assigns it the same local IP address with a different port number. Although both computers are sharing the same public IP address and accessing the Internet at the same time, the router knows exactly which computer to send specific packets to because each computer has a unique internal address.
Port Address Translation is also called porting, port overloading, port-level multiplexed NAT and single address NAT.
Shon Harris has the following example in her book:
The company owns and uses only one public IP address for all systems that need to communicate outside the internal network. How in the world could all computers use the exact same IP address? Good question. Here's an example: The NAT device has an IP address of 127.50.41.3. When computer A needs to communicate with a system on the
Internet, the NAT device documents this computer's private address and source port number (10.10.44.3; port 43,887). The NAT device changes the IP address in the computer's packet header to 127.50.41.3, with the source port 40,000. When computer B also needs to communicate with a system on the Internet, the NAT device documents the private address and source port number (10.10.44.15; port 23,398) and changes the header information to 127.50.41.3 with source port 40,001. So when a system responds to computer A, the packet first goes to the NAT device, which looks up the port number
40,000 and sees that it maps to computer A's real information. So the NAT device changes the header information to address 10.10.44.3 and port 43,887 and sends it to computer A for processing. A company can save a lot more money by using PAT, because the company needs to buy only a few public IP addresses, which are used by all systems in the network.
As mentioned on Wikipedia:
NAT is also known as Port Address Translation: is a feature of a network device that translate TCP or UDP communications made between host on a private network and host on a public network. I allows a single public IP address to be used by many host on private network which is usually a local area network LAN
NAT effectively hides all TCP/IP-level information about internal hosts from the Internet.
The following were all incorrect answer:
IP Spoofing - In computer networking, the term IP address spoofing or IP spoofing refers to the creation of Internet Protocol (IP) packets with a forged source IP address, called spoofing, with the purpose of concealing the identity of the sender or impersonating another computing system.
Subnetting - Subnetting is a network design strategy that segregates a larger network into smaller components. While connected through the larger network, each subnetwork or subnet functions with a unique IP address. All systems that are assigned to a particular subnet will share values that are common for both the subnet and for the network as a whole.
A different approach to network construction can be thought of as subnetting in reverse.
Known as CIDR, or Classless Inter-Domain Routing, this approach also creates a series of subnetworks. Rather than dividing an existing network into small components, CIDR takes smaller components and connects them into a larger network. This can often be the case when a business is acquired by a larger corporation. Instead of doing away with the network developed and used by the newly acquired business, the corporation chooses to continue operating that network as a subsidiary or an added component of the corporation's network. In effect, the system of the purchased entity becomes a subnet of the parent company's network.
IP Distribution - This is a generic term which could mean distribution of content over an IP network or distribution of IP addresses within a Company. Sometimes people will refer to this as Internet Protocol address management (IPAM) is a means of planning, tracking, and managing the Internet Protocol address space used in a network. Most commonly, tools such as DNS and DHCP are used in conjunction as integral functions of the IP address management function, and true IPAM glues these point services together so that each is aware of changes in the other (for instance DNS knowing of the IP address taken by a client via DHCP, and updating itself accordingly). Additional functionality, such as controlling reservations in DHCP as well as other data aggregation and reporting capability, is also common. IPAM tools are increasingly important as new IPv6 networks are deployed with larger address pools, different subnetting techniques, and more complex 128-bit hexadecimal numbers which are not as easily human-readable as IPv4 addresses.
Reference(s) used for this question:
STREBE, Matthew and PERKINS, Charles, Firewalls 24seven, Sybex 2000, Chapter 1:
Understanding Firewalls.
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the copyright CBK, Third Edition :
Telecommunications and Network Security, Page 350.
Harris, Shon (2012-10-25). copyright All-in-One Exam Guide, 6th Edition (Kindle Locations
12765-12774). Telecommunications and Network Security, Page 604-606
http://searchnetworking.techtarget.com/definition/Port-Address-Translation-PAT
http://en.wikipedia.org/wiki/IP_address_spoofing
http://www.wisegeek.com/what-is-subnetting.htm
http://en.wikipedia.org/wiki/IP_address_management


NEW QUESTION # 1195
Buffer overflow and boundary condition errors are subsets of which of the following?

  • A. Exceptional condition handling errors.
  • B. Race condition errors.
  • C. Access validation errors.
  • D. Input validation errors.

Answer: D

Explanation:
In an input validation error, the input received by a system is not properly checked, resulting in a vulnerability that can be exploited by sending a certain input sequence. There are two important types of input validation errors: buffer overflows (input received is longer than expected input length) and boundary condition error (where an input received causes the system to exceed an assumed boundary). A race condition occurs when there is a delay between the time when a system checks to see if an operation is allowed by the security model and the time when the system actually performs the operation. In an access validation error, the system is vulnerable because the access control mechanism is faulty. In an exceptional condition handling error, the system somehow becomes vulnerable due to an exceptional condition that has arisen.
Source: DUPUIS, Clement, Access Control Systems and Methodology copyright Open Study
Guide, version 1.0, march 2002 (page 105).


NEW QUESTION # 1196
......

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