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Articles on Trending Technologies
Technical articles with clear explanations and examples
What is Encapsulating Security Payload(ESP)?
Encapsulating Security Payload (ESP) is a core protocol in IPSec that provides confidentiality, integrity, and authentication for IP packets. Unlike Authentication Header (AH), ESP encrypts the payload data to ensure privacy and protection against eavesdropping and data tampering. ESP operates in two modes: Transport Mode (protects only the payload) and Tunnel Mode (protects the entire original IP packet by encapsulating it within a new packet). The protocol uses industry-standard algorithms such as SHA and MD5 for authentication and various encryption algorithms for confidentiality. How ESP Works ESP transforms readable data into an unreadable encrypted format using symmetric ...
Read MoreOperating System Based Virtualization
Operating System-based Virtualization is a virtualization technique where virtualization software runs on top of a host operating system, creating isolated environments called containers. This approach allows multiple applications or services to run independently on the same physical hardware while sharing the underlying OS kernel. The virtualization layer creates abstraction between the hardware and applications, enabling better resource utilization and isolation. Unlike traditional virtualization that creates complete virtual machines, OS-based virtualization shares the host kernel among containers, making it more lightweight and efficient. Operating System-Based Virtualization Architecture Physical Hardware ...
Read MoreWhat is Advanced Peer-to-Peer Networking (APPN)?
A Peer-to-Peer (P2P) network is a distributed computing model where tasks and workloads are shared among interconnected nodes called peers. Unlike traditional client-server architectures, all participants have equal capabilities and responsibilities for data processing and sharing. Advanced Peer-to-Peer Networking (APPN) is a sophisticated networking protocol developed by IBM as part of their Systems Network Architecture (SNA). APPN enables computers to communicate directly with each other without relying on a central server or controlling hardware, providing enhanced flexibility and fault tolerance. APPN Network Architecture Node A ...
Read MoreWhat is the difference between Cryptography and Cyber Security?
Understanding the relationship between cryptography and cyber security is essential in today's digital landscape. While these terms are often used together, they serve distinct but complementary roles in protecting digital information and systems. Cryptography Cryptography is the science of securing information by transforming readable data into an encoded format that can only be deciphered by authorized parties. This technique prevents unauthorized access to sensitive information during storage and transmission. The encoding process in cryptography uses mathematical theories and computational algorithms to convert plain text into ciphertext. This makes it extremely difficult for unauthorized individuals to access the ...
Read MoreBaseband Transmission
Baseband transmission is a digital signaling method where data bits are directly converted into electrical signals without modulation. In this transmission technique, the entire bandwidth of the communication channel is used to transmit a single digital signal. In baseband systems, typically a higher voltage level represents bit 1, while a lower voltage level represents bit 0. The choice of encoding scheme affects factors like synchronization, error detection capability, and bandwidth efficiency. Types of Baseband Encoding Baseband encoding schemes can be categorized into three main types: unipolar, polar, and bipolar encoding. Each category uses different voltage levels and ...
Read MoreDifference between Static IP Address and Dynamic IP Address
Static IP Address and Dynamic IP Address are two methods used to assign unique identifiers to devices on a network. Static IP addresses remain fixed and are manually configured, while dynamic IP addresses are automatically assigned and can change over time. Understanding the difference between these two addressing methods is crucial for network administrators, web developers, and anyone managing network infrastructure. What is an IP Address? An IP address (Internet Protocol address) is a numerical identifier assigned to each device connected to a network that uses the Internet Protocol for communication. It serves two main purposes: identifying ...
Read MoreWiFi Protected Access (WPA) and WiFi Protected Access 2 (WPA2)
Wi-Fi Protected Access (WPA) and Wi-Fi Protected Access 2 (WPA2) are security standards designed to protect network stations connected to WiFi networks. They were developed by the WiFi Alliance to deliver sophisticated data encryption technologies and improved user authentication over the pre-existing Wired Equivalent Privacy (WEP) standard. WiFi Protected Access (WPA) Wi-Fi Protected Access (WPA) was introduced in 2003 as an interim solution to address WEP's security vulnerabilities. It was designed to be backward-compatible with existing WEP hardware, enabling rapid and hassle-free adoption across wireless networks. The encryption method adopted in WPA is the Temporal Key Integrity ...
Read MoreWhat is Firewall in Computer Network?
A firewall is a network security device that monitors incoming and outgoing network traffic and determines whether to allow or block specific traffic based on a defined set of security rules. It acts as a barrier between trusted internal networks and untrusted external networks, such as the Internet. The primary purpose of a firewall is to establish a controlled gateway that filters network communications, allowing legitimate traffic while blocking malicious or unauthorized data packets. Firewalls are essential components of network security infrastructure, protecting systems from viruses, malware, and cyber attacks. Firewall Protection Model ...
Read MoreOptions Field in IPv4 Header
The Options Field in the IPv4 header is a variable-length field that provides additional functionality and control over packet processing. While optional, it allows network administrators to customize packet handling for specific requirements such as routing control, security measures, and network diagnostics. The options field is located after the fixed 20-byte header and can extend up to 40 bytes. Its presence is indicated by the Header Length field value exceeding 5 (which represents the standard 20-byte header). Structure of IPv4 Header with Options IPv4 Header Structure ...
Read MoreWhat is the difference between Tokenization and Encryption?
In today's digital landscape, protecting sensitive data is paramount for organizations handling personal information, financial records, and confidential business data. Two primary methods for securing sensitive information are tokenization and encryption, each serving distinct purposes and offering unique advantages for data protection strategies. Tokenization Tokenization is the process of replacing sensitive data elements (such as credit card numbers, bank account numbers, or social security numbers) with non-sensitive substitutes called tokens. These tokens are randomly generated values that have no mathematical relationship to the original data. Unlike encrypted data, tokenized information is completely irreversible without access to the ...
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