A zero-day threat is an attack that takes advantage of a security vulnerability that does not have a fix in place. It is referred to as a “zero-day” threat because once the flaw is eventually discovered, the developer or organization has “zero days” to then come up with a solution. A zero-day threat can compromise a system or network by exploiting the unknown vulnerability, and can cause data loss, unauthorized access, or other damages. Zero-day threats are difficult to detect and prevent, and require advanced security solutions and practices to mitigate them. References:

Palo Alto Networks Certified Cybersecurity Entry-level Technician (PCCET)

Zero-day (computing) - Wikipedia

What is a zero-day exploit? | Zero-day threats | Cloudflare

A static routing protocol requires that routes be created and updated manually on a router or other network device. If a static route is down, traffic can’t be automatically rerouted unless an alternate route has been configured. Also, if the route is congested, traffic can’t be automatically rerouted over the less congested alternate route. Static routing is practical only in very small networks or for very limited, special-case routing scenarios (for example, a destination that’s used as a backup route or is reachable only via a single router). However, static routing has low bandwidth requirements (routing information isn’t broadcast across the network) and some built-in security (users can route only to destinations that are specified in statically defined routes).

Log normalization – SIEMs standardize log formats from various sources, making it easier to analyze and correlate security events.

Incident response – Integration enables faster detection, investigation, and automated or guided response to security incidents by using correlated data from multiple tools.

Hardware procurement and security team training are not directly influenced by SIEM integration.

Static routing is a form of routing that occurs when a router uses a manually-configured routing entry, rather than information from dynamic routing traffic 1. Static routing has some advantages, such as simplicity, low overhead, and full control, but it also has some disadvantages, such as:

•Manual reconfiguration: Static routes require manual effort to configure and maintain. This can be time-consuming and error-prone, especially in large networks with many routes. If there is a change in the network topology or a link failure, the static routes need to be updated manually by the network administrator 23.

•Single point of failure: Static routing is not fault tolerant. This means that if the path used by the static route stops working, the traffic will not be rerouted automatically. The network will be unreachable until the failure is repaired or the static route is changed manually. Dynamic routing, on the other hand, can adapt to network changes and find alternative paths 23.

Morphing code, also known as polymorphism, allows advanced malware to change its code structure with each iteration or infection. This makes it extremely difficult for traditional signature-based detection tools to recognize and block the malware consistently.

Determining system health using unaltered system data – Active monitoring collects real-time data to assess the current health and performance of systems.

Using probes to establish potential load issues – Active monitoring uses synthetic transactions or probes to simulate user interactions and identify performance or load-related issues before they affect users.

Selective network security virtualization: Intra-host communications and live migrations are architected at this phase. All intra-host communication paths are strictly controlled to ensure that traffic between VMs at different trust levels is intermediated either by an on-box, virtual security appliance or by an off-box, physical security appliance.

A “ports first” data security solution is a traditional approach that relies on port numbers to identify and filter network traffic. This approach has several limitations and security weaknesses, such as12:

Port numbers are not reliable indicators of the type or content of network traffic, as they can be easily spoofed or changed by malicious actors.

Port numbers do not provide any visibility into the application layer, where most of the attacks occur.

Port numbers do not account for the dynamic and complex nature of modern applications, which often use multiple ports or protocols to communicate.

Port numbers do not support granular and flexible policies based on user identity, device context, or application behavior. One of the security weaknesses that is caused by implementing a “ports first” data security solution in a traditional data center is that you may have to open up multiple ports and these ports could also be used to gain unauthorized entry into your datacenter. For example, if you have a web server that runs on port 80, you may have to open up port 80 on your firewall to allow incoming traffic. However, this also means that any other service or application that uses port 80 can also access your datacenter, potentially exposing it to attacks. Moreover, opening up multiple ports increases the attack surface area of your network, as it creates more entry points for attackers to exploit34. References: Common Open Port Vulnerabilities List - Netwrix, Optimize security with Azure Firewall solution for Azure Sentinel | Microsoft Security Blog, Which item accurately describes a security weakness that is caused by …, Which item accurately describes a security weakness … - Exam4Training

Short-range wireless:

● Adaptive Network Technology+ (ANT+): ANT+ is a proprietary multicast wireless sensor

network technology primarily used in personal wearables, such as sports and fitness sensors.

● Bluetooth/Bluetooth Low-Energy (BLE): Bluetooth is a low-power, short-range

communications technology primarily designed for point-to-point communications between wireless devices in a hub-and-spoke topology. BLE (also known as Bluetooth Smart or Bluetooth 4.0+) devices consume significantly less power than Bluetooth devices and can access the internet directly through 6LoWPAN connectivity.

● Internet Protocol version 6 (IPv6) over Low-Power Wireless Personal Area Networks

(6LoWPAN): 6LoWPAN allows IPv6 traffic to be carried over low-power wireless mesh

networks. 6LoWPAN is designed for nodes and applications that require wireless internet

connectivity at relatively low data rates in small form factors, such as smart light bulbs

and smart meters.

● Wi-Fi/802.11: The Institute of Electrical and Electronics Engineers (IEEE) defines the 802

LAN protocol standards. 802.11 is the set of standards used for Wi-Fi networks typically

operating in the 2.4GHz and 5GHz frequency bands. The most common implementations

today include:

‒ 802.11n (labeled Wi-Fi 4 by the Wi-Fi Alliance), which operates on both 2.4GHz and 5GHz

bands at ranges from 54Mbps to 600Mbps

‒ 802.11ac (Wi-Fi 5), which operates on the 5GHz band at ranges from 433Mbps to 3.46

Gbps

‒ 802.11ax (Wi-Fi 6), which operates on the 2.4GHz and 5GHz bands (and all bands between 1 and 6GHz, when they become available for 802.11 use) at ranges up to 11Gbps

● Z-Wave: Z-Wave is a low-energy wireless mesh network protocol primarily used for home

automation applications such as smart appliances, lighting control, security systems,

smart thermostats, windows and locks, and garage doors.

● Zigbee/802.14: Zigbee is a low-cost, low-power wireless mesh network protocol based on the IEEE 802.15.4 standard. Zigbee is the dominant protocol in the low-power networking market, with a large installed base in industrial environments and smart home products.

 A rootkit is a type of malware that enables cyber criminals to gain access to and infiltrate data from machines without being detected. It covers software toolboxes designed to infect computers, give the attacker remote control, and remain hidden for a long period of time1 One of the most prominent characteristics of a rootkit is that it cannot be detected by antivirus because of its masking techniques. A rootkit may be able to subvert the software that is intended to find it, such as by hooking system calls, modifying kernel objects, or tampering with the registry2 Another prominent characteristic of a rootkit is that it takes control of the operating system. A rootkit may install itself in the kernel or the firmware of the device, giving it the highest level of privilege and access. A rootkit may also replace the bootloader or the BIOS of the machine, making it difficult to remove. A rootkit can use its control over the operating system to launch other malware, such as ransomware, bots, keyloggers, or trojans34 References:

1: What Is a Rootkit? How to Defend and Stop Them? | Fortinet

2: Rootkit - Wikipedia

3: What Is a Rootkit? – Microsoft 365

4: What is Rootkit? Attack Definition & Examples - CrowdStrike