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  1. A+ Core 1 Practice Tests
  2. A+ Core 2 Practice Tests
  3. Network+ Practice Tests
  4. Security+ Practice Tests

2. Security

2.1 Apply and use common prevention methods

1. Each Virtual Machine is like a separate platform, and the host PC is transparent to the end user. If the VM is infected with virus the end user may treat the virus same as in a normal PC. There is no need to shut down the host operating system.

2.2 Compare and contrast common security threats

1. Software is considered malware (malicious software) based on how the software is intended to be used. Malware includes computer viruses, worms, Trojan horses, spyware, dishonest adware, and other malicious and unwanted software

  1. a. A boot sector virus stays resident by infecting the boot sector of the computer

  2. b. A Master boot record (MBR) virus infect the first physical sector of all affected disks

  3. c. File viruses either replace or attach themselves to executable files, and most commonly found virus.

  4. d. Macro virus attaches itself to documents in the form of macros.

  5. e. Memory viruses are viruses that execute and stay resident in memory. Trojan Horse is an example of memory virus. A Trojan is not a virus. The principal variation between a Trojan horse, or Trojan, and a virus is that Trojans don't spread themselves. Trojan horses disguise themselves as valuable and useful software available for download on the internet. Trojan may work as a client software on your computer communicating with the Trojan server over the Internet.

  6. f. A browser hijacker is a form of malware, spyware or virus that replaces the existing internet browser home page, error page, or search page with its own.[1] These are generally used to force hits to a particular website.

2. Anti-virus update files are traditionally called as "Definitions".

3. Possible reasons for slow running of a computer may include insufficient memory, viruses and Trojan horses, too many TSRs (Terminate and Stay Resident) running at the same time, etc. Ensure that your computer has sufficient memory, hard disk space, and anti-virus software installed (particularly if connected to the Internet).

2.3 Implement security best practices to secure a workstation

1. Encrypting File System (EFS) keeps your documents safe from intruders who might gain unauthorized physical access to your sensitive stored data by stealing your laptop or Zip disk, or by other means.

2. Anti-virus software, and Spyware software can be used to clear malicious programs from a computer. Also, note that you need to install up-to-date Service Packs, and patches.

3. Never store passwords in plain text files.

4. Never write down the username and passwords on a paper if done so destroy it after memorizing it.

2.4 Given a scenario, use the appropriate data destruction/disposal method

1. Batteries contain environmentally hazardous chemicals and therefore, should not be disposed through dust bit. Always refer to the manufacturer's instructions or the relevant State guidelines. The same is true when you are disposing chemical solvents.

2. MSDS stands for Material Safety Data Sheet. It is US state department document that contain information on any substance that is hazardous, and proper use / disposal.

3. Nickel Cadmium battery is not environmentally friendly and not as efficient as Nickel/Metal hydride or Lithium Ion. Nickel/Metal hydride, though environmentally friendly, not as efficient as Lithium Ion. Lithium Ion battery is environmentally friendly and very efficient.

4. To get rid of the old computers proper options are:

  1. a. Donate to a charity

  2. b. Recycle it by giving it to a recycle center

  3. c. Give it to a training school in the neighborhood

2.5 Given a scenario, secure a SOHO wireless network

1. MAC limiting the MAC addresses that can access the wireless network, you can prevent unauthorized computers from accessing your wireless network. Note that each MAC address is unique, and hence MAC address filtering can effectively prevent unauthorized computer access.

2. MAC Filtering (or layer 2 address filtering) refers to a security access control method whereby the 48-bit address (also called MAC address) assigned to each network card is used to determine access to the network. MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the use of blacklists and whitelists.

3. WEP, short for Wireless Equivalent Protection, is a security protocol designed to provide protection equivalent to wired LANs. WPA is an improved security protocol compared to WEP.

4. Wi-Fi Protected Access (WPA) and Wi-Fi Protected Access II (WPA2) are two security protocols and security certification programs developed by the Wi-Fi Alliance to secure wireless computer networks.

4. Wi-Fi Protected Access (WPA) and Wi-Fi Protected Access II (WPA2) are two security protocols and security certification programs developed by the Wi-Fi Alliance to secure wireless computer networks.

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