A startup firm contains various devices connected to a wireless network across the floor. An AP with Internet connectivity is placed in a corner to allow wireless communication between devices. To support new devices connected to the network beyond the APS range, an administrator used a network device that extended the signals of the wireless AP and transmitted it to uncovered area, identify the network component employed by the administrator to extend signals in this scenario.
Correct Answer:
A
Wireless repeater is the network component employed by the administrator to extend signals in this scenario. A wireless network is a type of network that uses radio waves or infrared signals to transmit data between devices without using cables or wires. A wireless network can consist of various components, such as wireless access points (APs), wireless routers, wireless adapters, wireless bridges, wireless repeaters, etc. A wireless repeater is a network component that extends the range or coverage of a wireless signal by receiving it from an AP or another repeater and retransmitting it to another area . A wireless repeater can be used to support new devices connected to the network beyond the AP’s range . In the scenario, a startup firm contains various devices connected to a wireless network across the floor. An AP with internet connectivity is placed in a corner to allow wireless communication between devices. To support new devices connected to the network beyond the AP’s range, an administrator used a network component that extended the signals of the wireless AP and transmitted it to the uncovered area. This means that he used a wireless repeater for this purpose. A wireless bridge is a network component that connects two or more wired or wireless networks or segments together . A wireless bridge can be used to expand the network or share resources between networks . A wireless modem is a network component that modulates and demodulates wireless signals to enable data transmission over a network . A wireless modem can be used to provide internet access to devices via a cellular network or a satellite network . A wireless router is a network component that performs the functions of both a wireless AP and a router . A wireless router can be used to create a wireless network and connect it to another network, such as the internet
A company decided to implement the cloud infrastructure within its corporate firewall 10 secure sensitive data from external access. The company invested heavily in creating a cloud architecture within its premises to manage full control over its corporate data. Which of the following types of cloud deployment models did the company implement in this scenario?
Correct Answer:
C
Private cloud is the type of cloud deployment model that the company implemented in this scenario. Cloud computing is a model that provides on-demand access to shared and scalable computing resources, such as servers, storage, networks, applications, etc., over the internet or a network. Cloud computing can have different types based on its service or deployment model. A cloud deployment model defines how and where the cloud infrastructure and services are hosted and accessed . A cloud deployment model can have different types, such as public cloud, private cloud, hybrid cloud, community cloud, etc. A private cloud is a type of cloud deployment model that provides exclusive access to cloud infrastructure and services to a single organization or entity . A private cloud can be hosted within or outside the organization’s premises and managed by the organization or a third-party provider . A private cloud can be used to secure sensitive data from external access and maintain full control over the corporate data . In the scenario, the company decided to implement the cloud infrastructure within its corporate firewall to secure sensitive data from external access. The company invested heavily in creating a cloud architecture within its premises to manage full control over its corporate data. This means that the company implemented a private cloud for this purpose. A multi- cloud is not a type of cloud deployment model, but a term that describes a strategy that uses multiple public or private clouds from different providers for different purposes or functions . A public cloud is a type of cloud deployment model that provides open access to cloud infrastructure and services to multiple organizations or entities over the internet . A public cloud can be hosted and managed by a third-party provider that owns and operates the cloud infrastructure and services . A community cloud is a type of cloud deployment model that provides shared access to cloud infrastructure and services to multiple organizations or entities that have common interests or goals
Miguel, a professional hacker, targeted an organization to gain illegitimate access to its critical information. He identified a flaw in the end-point communication that can disclose the target application's data.
Which of the following secure application design principles was not met by the application in the above scenario?
Correct Answer:
C
Exception handling is a secure application design principle that states that the application should handle errors and exceptions gracefully and securely, without exposing sensitive information or compromising the system’s functionality. Exception handling can help prevent attackers from exploiting errors or exceptions to gain access to data or resources or cause denial-of-service attacks. In the scenario, Miguel identified a flaw in the end-point communication that can disclose the target application’s data, which means that the application did not meet the exception handling principle.
Gideon, a forensic officer, was examining a victim's Linux system suspected to be involved in online criminal activities. Gideon navigated to a directory containing a log file that recorded information related to user login/logout. This information helped Gideon to determine the current login state of cyber criminals in the victim system, identify the Linux log file accessed by Gideon in this scenario.
Correct Answer:
B
/var/log/wtmp is the Linux log file accessed by Gideon in this scenario.
/var/log/wtmp is a log file that records information related to user login/logout, such as username, terminal, IP address, and login time. /var/log/wtmp can be used to determine the current login state of users in a Linux system. /var/log/wtmp can be viewed using commands such as last, lastb, or utmpdump1. References: Linux Log Files
Identify a machine in the network with 5SH service enabled. Initiate an SSH Connection to the machine, find the file, ttag.txt. in the machine, and enter the tile's content as the answer. The credentials tor SSH login are sam/adm(admin@123. {Practical Question)
Correct Answer:
D
bob1@sam is the file’s content as the answer. To find the machine with SSH service enabled, one can use a network scanning tool such as Nmap to scan the network for port 22, which is the default port for SSH. For example, the command nmap -p 22 192.168.0.0/24 will scan the network range 192.168.0.0/24 for port 22 and display the results2. To initiate an SSH connection to the machine, one can use a command-line tool such as ssh or an SSH client such as PuTTY to connect to the machine using the credentials sam/admin@123. For example, the command ssh sam@192.168.0.10 will connect to the machine with IP address 192.168.0.10 using the username sam and prompt for the password admin@1233. To find the file flag.txt in the machine, one can use a file searching tool such as find or locate to search for the file name in the machine’s file system. For example, the command find / -name flag.txt will search for the file flag.txt from the root directory (/) and display its location4. To enter the file’s content as the answer, one can use a file viewing tool such as cat or less to display the content of the file flag.txt. For example, the command cat /home/sam/flag.txt will display the content of the file flag.txt located in /home/sam/ directory5. The screenshot below shows an example of performing these steps: ![Screenshot of performing these steps] References: Nmap Tutorial, SSH Tutorial, Find Command Tutorial, Cat Command Tutorial, [Screenshot of performing these steps]