In order to accomplish the task, you should limit the number of Syslog messages or TCP connections from a specific source for a certain time period. This will prevent a denial of service (DoS) for the Syslog server and the loss of Syslog messages from other sources. Answer D is incorrect. You can encrypt rotated log files automatically using third-party or OS mechanisms to protect data confidentiality. Answer A is incorrect. You can use a different message format other than Syslog in order to accept data for aggregating data from hosts that do not support Syslog. Answer B is incorrect. You can enable the storage of log entries in both traditional Syslog files and a database for creating a database storage for logs.

The potential security disadvantages of virtualization are as follows: It increases configuration effort because of complexity and composite system. It initiates the problem of how to prevent overlap while mapping VM storage onto host files. It introduces the problem of virtualizing the TPM. It creates the possibility that remote attestation may not work. It initiates the problem of detecting VM covert channels. It involves new protection mechanisms for preventing VM escape, VM detection, and VM-VM interference. It initiates the possibility of virtual networking configuration errors. It initiates the risk that malicious software is targeting the VM environment. It increases overall security risk shared resources, such as networks, clipboards, clocks, printers, desktop management, and folders. Answer A and B are incorrect. These are not the disadvantages of virtualization, as described in the NIST Information Security and Privacy Advisory Board (ISPAB) paper "Perspectives on Cloud Computing and Standards".

The Secure Sockets Layer (SSL) is a commonly-used protocol for managing the security of a message transmission on the Internet. SSL has recently been succeeded by Transport Layer Security (TLS), which is based on SSL. SSL uses a program layer located between the Internet's Hypertext Transfer Protocol (HTTP) and Transport Control Protocol (TCP) layers. SSL is included as part of both the Microsoft and Netscape browsers and most Web server products. URLs that require an SSL connection start with https: instead of http:. Answer C is incorrect. S/MIME (Secure/Multipurpose Internet Mail Extensions) is a standard for public key encryption and signing of e- mail encapsulated in MIME. S/MIME provides the following cryptographic security services for electronic messaging applications: authentication, message integrity, non-repudiation of origin (using digital signatures), privacy, and data security (using encryption). Answer D is incorrect. Hypertext Transfer Protocol (HTTP) is a client/server TCP/IP protocol used on the World Wide Web (WWW) to display Hypertext Markup Language (HTML) pages. HTTP defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands. For example, when a client application or browser sends a request to the server using HTTP commands, the server responds with a message containing the protocol version, success or failure code, server information, and body content, depending on the request. HTTP uses TCP port 80 as the default port. Answer B is incorrect. A Virtual Private Network (VPN) is a computer network that is implemented in an additional software layer (overlay) on top of an existing larger network for the purpose of creating a private scope of computer communications or providing a secure extension of a private network into an insecure network such as the Internet. The links between nodes of a Virtual Private Network are formed over logical connections or virtual circuits between hosts of the larger network. The Link Layer protocols of the virtual network are said to be tunneled through the underlying transport network.

A simulation test is a method used to test the disaster recovery plans. It operates just like a structured walk-through test. In the simulation test, the members of a disaster recovery team present with a disaster scenario and then, discuss on appropriate responses. These suggested responses are measured and some of them are taken by the team. The range of the simulation test should be defined carefully for avoiding excessive disruption of normal business activities. Answer A is incorrect. The structured walk-through test is also known as the table-top exercise. In structured walk-through test, the team members walkthrough the plan to identify and correct weaknesses and how they will respond to the emergency scenarios by stepping in the course of the plan. It is the most effective and competent way to identify the areas of overlap in the plan before conducting more challenging training exercises. Answer B is incorrect. A full-interruption test includes the operations that shut down at the primary site and are shifted to the recovery site according to the disaster recovery plan. It operates just like a parallel test. The full-interruption test is very expensive and difficult to arrange. Sometimes, it causes a major disruption of operations if the test fails. Answer C is incorrect. A parallel test includes the next level in the testing procedure, and relocates the employees to an alternate recovery site and implements site activation procedures. These employees present with their disaster recovery responsibilities as they would for an actual disaster. The disaster recovery sites have full responsibilities to conduct the day-to-day organization's business.

Explanation:

The various categories of root cause analysis (RCA) are as follows: Safety-based RC A.
It consists of plans from the health and safety areas. Production-based RCA. It integrates quality control paradigms. Process-based RCA. It integrates business processes. Failure-based RCA. It integrates failure analysis processes as employed in engineering and maintenance. Systems-based RCA. It integrates the methods from risk and systems analysis.