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[General] CISSP Valid Exam Syllabus, Reliable CISSP Braindumps Ppt

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【General】 CISSP Valid Exam Syllabus, Reliable CISSP Braindumps Ppt

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ISC Certified Information Systems Security Professional (CISSP) Sample Questions (Q19-Q24):NEW QUESTION # 19
Which of the following examples is BEST to minimize the attack surface for a customer's private information?
  • A. Data masking
  • B. Authentication
  • C. Collection limitation
  • D. Obfuscation
Answer: C

NEW QUESTION # 20
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 subnetting
  • B. Port address translation
  • C. IP Distribution
  • D. IP Spoofing
Answer: B
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 CISSP CBK, Third Edition :
Telecommunications and Network Security, Page 350.
Harris, Shon (2012-10-25). CISSP All-in-One Exam Guide, 6th Edition (Kindle Locations
12765-12774). Telecommunications and Network Security, Page 604-606
http://searchnetworking.techtarg ... ess-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 # 21
Which one of the following attacks will pass through a network layer intrusion detection system
undetected?
  • A. A test.cgi attack
  • B. A SYN flood attack
  • C. A teardrop attack
  • D. A DNS spoofing attack
Answer: A
Explanation:
"Because a network-based IDS reviews packets and headers, it can also detect denial of service (DoS) attacks." Pg. 64 Krutz: The CISSP Prep Guide
Not A or B:
"The following sections discuss some of the possible DoS attacks available.
Smurf Fraggle SYN Flood Teardrop DNS DoS Attacks"
Pg. 732-737 Shon Harris: All-In-One CISSP Certification Exam Guide

NEW QUESTION # 22
Which choice below is NOT one of the legal IP address ranges specified
by RFC1976 and reserved by the Internet Assigned Numbers Authority
(IANA) for nonroutable private addresses?
  • A. 10.0.0.0 - 10.255.255.255
  • B. 172.16.0.0 - 172.31.255.255
  • C. 192.168.0.0 - 192.168.255.255
  • D. 127.0.0.0 - 127.0.255.255
Answer: D
Explanation:
The other three address ranges can be used for Network Address Translation (NAT). While NAT is, in itself, not a very effective security measure, a large network can benefit from using NAT with Dynamic Host Configuration Protocol (DHCP) to help prevent certain internal routing information from being exposed. The address
127.0.0.1 is called the loopback address. Source: Designing Network Security by Merike Kaeo (Cisco Press, 1999).

NEW QUESTION # 23
Which of the following techniques is known to be effective in spotting resource exhaustion problems, especially with resources such as processes, memory, and connections?
  • A. Manual code review
  • B. Fuzzing
  • C. Automated static analysis
  • D. Automated dynamic analysis
Answer: B
Explanation:
Fuzzing is a technique that is known to be effective in spotting resource exhaustion problems, especially with resources such as processes, memory, and connections. Fuzzing is a type of testing that involves sending random, malformed, or unexpected input to the system or application, and observing its behavior and response.
Fuzzing can help to identify resource exhaustion problems, such as memory leaks, buffer overflows, or connection timeouts, which can affect the availability, functionality, or security of the system or application.
Fuzzing can also help to discover other types of vulnerabilities, such as logic errors, input validation errors, or exception handling errors. Automated dynamic analysis, automated static analysis, and manual code review are not techniques that are known to be effective in spotting resource exhaustion problems, although they may be used for other types of testing or analysis. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 8: Software Development Security, page 1001; Official (ISC)2 Guide to the CISSP CBK, Fifth Edition, Chapter 7: Software Development Security, page 923.

NEW QUESTION # 24
......
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