- (Topic 1)
You work as a Java Programmer for JavaSkills Inc. You are working with the Linux operating system. Nowadays, when you start your computer, you notice that your OS is taking more time to boot than usual. You discuss this with your Network Administrator. He suggests that you mail him your Linux bootup report. Which of the following commands will you use to create the Linux bootup report?
Correct Answer:B
According to the scenario, you can use dmesg > bootup_report.txt to create the bootup file. With this command, the bootup messages will be displayed and will be redirected towards bootup_report.txt using the > command.
- (Topic 2)
Pingdom is a website monitoring service. Which of the following services are provided by Pingdom?
Correct Answer:BCD
Pingdom is a website monitoring service that is used by administrators to monitor sites and servers on the Internet. It alerts the site owners if it detects a problem. Pingdom service is used to track the uptime, downtime, and overall performance of websites. Pingdom also works as an iPhone application to make sure that a website is reachable and responding properly at all times. If not so, it provides the administrator with the email and SMS alerts. It creates charts and tables that are easy to understand. These charts and tables enable an administrator to spot trends and accurately pinpoint problems. Answer A is incorrect. Pingdom creates charts that are easy to understand. These charts are used to spot trends and accurately pinpoint problems.
- (Topic 2)
Which of the following are the reasons for implementing firewall in any network?
Correct Answer:ABEF
A firewall is a part of a computer system or network that is designed to block unauthorized access while permitting authorized communications. It is a device or set of devices configured to permit, deny, encrypt, decrypt, or proxy all computer traffic between different security domains based upon a set of rules and other criteria. The four important roles of a firewall are as follows:
* 1. Implement security policy: A firewall is a first step in implementing security policies of an organization. Different policies are directly implemented at the firewall. A firewall can also work with network routers to implement Types-Of-Service (ToS) policies.
* 2. Creating a choke point: A firewall can create a choke point between a private network of
an organization and a public network. With the help of a choke point the firewall devices can monitor, filter, and verify all inbound and outbound traffic.
* 3. Logging Internet activity: A firewall also enforces logging of the errors and faults. It also provides alarming mechanism to the network.
* 4. Limiting network host exposure: A firewall can create a perimeter around the network to protect it from the Internet. It increases the security by hiding internal information.
- (Topic 3)
What are the purposes of audit records on an information system? (Choose two)
Correct Answer:CD
The following are the purposes of audit records on an information system: Troubleshooting Investigation An IT audit is the process of collecting and evaluating records of an organization's information systems, practices, and operations. The evaluation of records provides evidence to determine if the information systems are safeguarding assets, maintaining data integrity, and operating effectively and efficiently enough to achieve the organization's goals or objectives. These reviews may be performed in conjunction with a financial statement audit, internal audit, or other form of attestation engagement. Audit records are also used to troubleshoot system issues. Answer A, B are incorrect. The audit records cannot be used for backup and upgradation purposes.
- (Topic 1)
You work as a Network Administrator for XYZ CORP. The company has a Linux-based network. You need to configure a firewall for the company. The firewall should be able to keep track of the state of network connections traveling across the network. Which of the following types of firewalls will you configure to accomplish the task?
Correct Answer:D
A stateful firewall is a firewall that keeps track of the state of network connections (such as TCP streams, UDP communication) traveling across it. The firewall is programmed to distinguish legitimate packets for different types of connections. Only packets matching a known connection state will be allowed by the firewall; others will be rejected. Answer B is incorrect. A host-based application firewall can monitor any application input, output, and/or system service calls made from, to, or by an application. This is done by examining information passed through system calls instead of, or in addition to, a network stack. A host-based application firewall can only provide protection to the applications running on the same host. An example of a host-based application firewall that controls system service calls by an application is AppArmor or the Mac OS X application firewall. Host-based application firewalls may also provide network-based application firewalling. Answer A is incorrect. A network-based application layer firewall, also known as a proxy-based or reverse-proxy firewall, is a computer networking firewall that operates at the application layer of a protocol stack. Application firewalls specific to a particular kind of network traffic may be titled with the service name, such as a Web application firewall. They may be implemented through software running on a host or a stand-alone piece of network hardware. Often, it is a host using various forms of proxy servers to proxy traffic before passing it on to the client or server. Because it acts on the application layer, it may inspect the contents of the traffic, blocking specified content, such as certain websites, viruses, and attempts to exploit known logical flaws in client software. Answer C is incorrect. An application firewall is a form of firewall that controls input, output, and/or access from, to, or by an application or service. It operates by monitoring and potentially blocking the input, output, or system service calls that do not meet the configured policy of the firewall. The application firewall is typically built to monitor one or more specific applications or services (such as a web or database service), unlike a stateful network firewall, which can provide some access controls for nearly any kind of network traffic. There are two primary categories of application firewalls: Network-based application firewalls Host-based application firewalls