Home > Articles > Security > Network Security

This chapter is from the book

Exam Prep Questions

Question 1

A network administrator is testing a new monitoring application that uses multiple Internet Control Message Protocol (ICMP) messages to host systems. The application is reported on IEV as a network attack. This alarm is referred to as a

  1. False positive

  2. False negative

  3. True positive

  4. True negative

Answer A is correct. Because it was not an actual malicious attack but resulted in the generation of an alarm, this alarm is referred to as a false positive. A false negative occurs when an actual attack is not reported; therefore, Answer B is incorrect. True positives occur when real attacks are successfully detected and reported; therefore, Answer C is incorrect. True negatives happen when no attack occurred and no alarm was generated. Therefore, Answer D is incorrect.

Question 2

Which three of the following methodologies are valid methodologies employed by IDS signatures to detect network attacks?

  1. Heuristic analysis

  2. Signature-based detection

  3. Host-based detection

  4. Pattern matching

  5. Flood decode analysis

  6. Obfuscation detection

Answers A, B, and D are correct. Heuristic analysis, signature-based detection, and pattern matching are all valid methodologies used by signatures to detect intrusions. Although IDS components can be host-based, such as the Security Agent, host-based is not a methodology employed by signatures. Therefore, Answer C is incorrect. Flood decode analysis does not exist, and obfuscation is an IDS evasive technique commonly used by attackers. Therefore, Answers E and F are incorrect.

Question 3

Which of the following IDS components were designed for lower-risk network environments? (Choose two.)

  1. 4200 Series Sensor Appliance

  2. Router IOS IDS

  3. Cisco Security Agent

  4. IDSM2

  5. PIX IDS

  6. Host Agent IDS

Answers B and E are correct. The Router Sensor IOS IDS and the Firewall Sensor PIX IDS contain a subset of the Sensor appliance IDS signatures and were designed for lower-risk environments. The 4200 Series Sensor Appliances provide a robust platform for intrusion detection and are designed for high-risk environments; therefore, Answer A is incorrect. Cisco Security Agent, and the host agent IDS product, is agent software that resides on hosts, and it is not designed for network intrusion detection; Answers C and F are therefore incorrect. The IDSM2 is a high-performance switching module designed for high-throughput intrusion detection with no impact on switch performance. It was not designed for lower-risk environments, so Answer D is incorrect.

Question 4

Which of the following are methods used to evade IDSs? (Choose three.)

  1. Denial of service

  2. Fragmentation

  3. Pattern matching

  4. Obfuscation

  5. Encryption

  6. Access attack

Answers B, D, and E are correct. Fragmentation, obfuscation, and encryption are all evasive techniques used by attackers to dodge IDS detection. Denial-of-service and access attacks are forms of attacks performed by hackers but are not directly used to compromise IDSs. Answers A and F are therefore incorrect. Pattern matching is a methodology used by signatures to detect an intrusion, not an evasive technique. Therefore, Answer C is incorrect.

Question 5

Which of the following is a component that is included with Cisco IEV?

  1. CSEC

  2. CCO

  3. NSDB

  4. C-CRT

Answer C is correct. Cisco's IEV, available from http://www.cisco.com, includes the Network Security Database, a reference of detailed signature and vulnerability information. CCO is a Cisco Connection Online account and is required to access the online version of NSDB. CSEC, the Cisco Secure Encyclopedia, is the online version of NSDB. Answers A and B are therefore incorrect. C-CRT is the Cisco Countermeasures Research Team, which provides support for active updates but has no relationship to IEV. Therefore, Answer D is incorrect.

Question 6

Which of the following are enhancements that the IDSM2 offers over the IDSM? (Choose three.)

  1. 600Mbps instead of 200Mbps

  2. 600Mbps instead of 120Mbps

  3. SPAN and RSPAN support

  4. VACL capture

  5. Same code as version 4 sensor appliances

  6. Support for both blocking and TCP Reset

Answers B, E, and F are correct. The IDSM2 offers 600Mbps instead of the IDSM's 120, uses the same code as the version 4 sensor appliances, and supports both blocking and TCP resets in response to attack detection. The IDSM supports only 120Mbps of performance and not 200Mbps; therefore, Answer A is incorrect. The IDSM also supports SPAN, RSPAN, and VACL capture; therefore, Answers C and D are incorrect.

Question 7

IEV version 4 can support the monitoring and reporting of up to how many sensor devices?

  1. Only the device on which it's installed

  2. Three

  3. Five

  4. Up to 300

Answer C is correct. IEV version 4 can support the monitoring and reporting of up to five sensor devices. IEV version 3 supports up to three sensor devices, but the question specifically refers to IEV version 4. Answers A, B, and D are therefore incorrect.

Question 8

Management Center for the Cisco Security Agent (CSA MC) supports deployment for up to how many host agents?

  1. 100

  2. 1000

  3. 3000

  4. 5000

Answer D is correct. The CSA MC supports management for up to 5000 host Security Agents. Therefore, Answers A, B, and C are incorrect.

Question 9

The PostOffice protocol uses which of the following ports?

  1. TCP 1741

  2. UDP 1741

  3. TCP 443

  4. UDP 443

  5. TCP 45000

  6. UDP 45000

Answer F is correct. The PostOffice protocol uses UDP port 45000 for communications. Therefore, Answers A through E are incorrect.

Question 10

When using RDEP, when are alarms overwritten?

  1. When a time limit configured through MC is reached

  2. When the threshold of 2GB is reached

  3. When the threshold of 4GB is reached

  4. When the alarm threshold configured through MC is reached

  5. Either on an hourly, daily, or weekly basis, as configured through IEV

Answer C is correct. A Sensor process called sensorApp begins to overwrite alarms when the threshold of 4GB is reached. Therefore, Answers A, B, D and E are incorrect.

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020