312-50v13 Exam Dumps : Certified Ethical Hacker Exam (CEHv13)

A Network-based Intrusion Detection System (NIDS) monitors all network traffic for signs of suspicious activity across multiple hosts. In large environments with critical assets (e.g., financial or healthcare networks), NIDS is ideal because it provides visibility into entire network segments, not just individual systems.

NIDS can be deployed at strategic points (e.g., DMZs, VLANs, subnets) to detect unauthorized access, malware activity, or policy violations.

Reference – CEH v13 Official Courseware:

Module 13: Evading IDS, Firewalls, and Honeypots

Quote:

“Network-based IDS monitors traffic across an entire subnet or segment and is most effective in large environments to detect malicious activity before it reaches critical assets.”

Incorrect Options Explained:

A. Honeypots attract and log attacker behavior, but do not provide network-wide detection.

B. Firewalls filter traffic but are not detection systems.

D. HIDS monitors activity on a single host only.

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Software as a service (SaaS) allows users to attach to and use cloud-based apps over the web. Common examples ar email, calendaring and workplace tool (such as Microsoft workplace 365).

SaaS provides a whole software solution that you get on a pay-as-you-go basis from a cloud service provider. You rent the use of an app for your organisation and your users connect with it over the web, typically with an internet browser. All of the underlying infrastructure, middleware, app software system and app knowledge ar located within the service provider’s knowledge center. The service provider manages the hardware and software system and with the appropriate service agreement, can make sure the availability and also the security of the app and your data as well. SaaS allows your organisation to induce quickly up and running with an app at token upfront cost.

Common SaaS scenarios

This tool having used a web-based email service like Outlook, Hotmail or Yahoo! Mail, then you have got already used a form of SaaS. With these services, you log into your account over the web, typically from an internet browser. the e-mail software system is found on the service provider’s network and your messages ar hold on there moreover. you can access your email and hold on messages from an internet browser on any laptop or Internet-connected device.

The previous examples are free services for personal use. For organisational use, you can rent productivity apps, like email, collaboration and calendaring; and sophisticated business applications like client relationship management (CRM), enterprise resource coming up with (ERP) and document management. You buy the use of those apps by subscription or per the level of use.

Advantages of SaaS

Gain access to stylish applications. to supply SaaS apps to users, you don’t ought to purchase, install, update or maintain any hardware, middleware or software system. SaaS makes even sophisticated enterprise applications, like ERP and CRM, affordable for organisations that lack the resources to shop for, deploy and manage the specified infrastructure and software system themselves.

Pay just for what you utilize. you furthermore may economize because the SaaS service automatically scales up and down per the level of usage.

Use free shopper software system. Users will run most SaaS apps directly from their web browser without needing to transfer and install any software system, though some apps need plugins. this suggests that you simply don’t ought to purchase and install special software system for your users.

Mobilise your hands simply. SaaS makes it simple to “mobilise” your hands as a result of users will access SaaS apps and knowledge from any Internet-connected laptop or mobile device. You don’t ought to worry concerning developing apps to run on differing types of computers and devices as a result of the service supplier has already done therefore. additionally, you don’t ought to bring special experience aboard to manage the safety problems inherent in mobile computing. A fastidiously chosen service supplier can make sure the security of your knowledge, no matter the sort of device intense it.

Access app knowledge from anyplace. With knowledge hold on within the cloud, users will access their info from any Internet-connected laptop or mobile device. And once app knowledge is hold on within the cloud, no knowledge is lost if a user’s laptop or device fails.

A Boot Sector Virus infects the master boot record (MBR) of the system. When a system boots, it first loads the MBR into memory. A Boot Sector Virus takes advantage of this by moving the original MBR to a different location on the hard disk and writing itself to the original MBR location. This ensures that it is executed first during system startup.

As per CEH v13 course material:

“A boot sector virus infects the master boot record of a hard disk. It moves the original boot sector to a different location on the hard disk and replaces it with its own malicious code. When the computer is booted, the virus loads first and then hands control to the original boot sector code.”

Reference – CEH v13 Study Guide:

Module 06: Malware Threats, Section: “Types of Malware”, Subsection: “Boot Sector Viruses”

Incorrect Options Explained:

A: Describes directory virus behavior, not boot sector.

B: The virus moves MBR on the hard disk, not RAM.

D: Some viruses overwrite MBR, but most preserve the original and move it to another disk location to maintain system operability.