Ritesh Dewoolkar

What is a Denial of Service attack?

A Denial of Service is a cyber-attack in which the attacker with malicious aim makes the machine or network resource unavailable to its intended users by flooding the target network with heavy traffic.

The DoS attacks typically exploited the security vulnerabilities present in the network or system. The victims of DoS attacks are often high-profile organizations such as banking, commerce, government, and trade organizations.

How does a DoS attack work?

Denial of service is typically achieved by overwhelming or flooding the targeted network with a huge amount of requests with a malicious attempt to overload the system and prevent some legitimate requests from being fulfilled.

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Denial of Service Attacks(DoS) and its types?Read More »

OSI stands for Open Systems Interconnection and is been developed by ISO(International Organization of Standardization) in the year 1984. The OSI reference model is a 7 layer architecture with each layer having its own specific function to perform.

The OSI model is a conceptual framework to better understand the complex interactions that are happening. The layers of the OSI model work collaboratively to transmit data from one person to another across the globe.

The first 4 layers are considered as the lower layers or hardware layers and are responsible for moving data around. The layers from 5-7 are called the upper layers of software layers and contain application-level data.

The 7 layers of the OSI model are:

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What are the 7 layers of the OSI model?Read More »

What is Intrusion Detection System(IDS)?

An Intrusion Detection System(IDS) is a software application that scans a network or a system for malicious activities or policy violations.

Any malicious activity or violation is reported either to the network administrator or collected using a SIEM system(security information and event management).

A SIEM system combines output from multiple sources and uses alarm filtering techniques to differentiate between malicious activities from false alarms. 

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Types of Intrusion Detection System(IDS)Read More »

AES and DES are both symmetric-key cryptographic algorithms, in which the sender and receiver both use a single shared key for both encryption and decryption.

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Difference between AES and DES in cryptographyRead More »

What is a Firewall?

A Firewall is a cybersecurity tool (computer hardware or software) that helps to protect your network by filtering unwanted or blocking specific traffic based on defined security rules. The primary goal of a firewall is to protect the network from malicious traffic requests and allow only authorized traffic through.

The term firewall is originally referred to as a wall, intended for confining fire within a line of adjacent buildings. Firewall generally works at layer 3 and 4 of the OSI (Open Systems Interconnection) model.

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What is Firewall and its Types?Read More »