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Articles on Trending Technologies
Technical articles with clear explanations and examples
Arbitration Inter-Frame Spacing (AIFS)
Arbitration Inter-Frame Spacing (AIFS) is a quality of service mechanism used in IEEE 802.11e WLAN standard (Wi-Fi) to provide differentiated channel access at the medium access control (MAC) layer. It determines the time interval that a station must wait before transmitting, prioritizing stations based on their Access Category (AC). How AIFS Works In wireless communication, collision detection is difficult due to the hidden node problem and signal fading. Therefore, collision avoidance schemes are essential when multiple stations compete for channel access. AIFS assigns different waiting periods to frames based on their priority level, ensuring that time-sensitive traffic like ...
Read MoreHow To Prevent Ransomware Attack?
Ransomware is a type of malware that encrypts victim's files and demands payment in exchange for the decryption key. This growing threat affects individuals, organizations, and governments worldwide, often demanding significant ransom payments without guaranteeing data recovery. Prevention through proactive security measures is the most effective defense against these attacks. Ransomware Attack Prevention Framework Software Updates & Patch Management Strong Authentication & Access Control Data Backups & Recovery Plans ...
Read MoreWhat is the POP Protocol in Computer Network?
POP (Post Office Protocol) is a standard email retrieval protocol that allows email clients to download messages from a remote mail server. It provides a mechanism for users who don't maintain permanent internet connections to receive their emails by pulling them from a centralized server. Consider a scenario where user A connects to the Internet using a dial-up connection. When user B sends an email to A while A is offline, the message gets stored in A's mailbox on the ISP's mail server. When A connects later and opens their email client, the client's POP component contacts the ISP's ...
Read MoreWhat is the Simplified Data Encryption Standard?
Simplified Data Encryption Standard (S-DES) is a simplified version of the Data Encryption Standard (DES) algorithm designed for educational purposes. S-DES processes an 8-bit block of plaintext using a 10-bit key to produce an 8-bit block of ciphertext. The decryption process reverses this operation, taking the 8-bit ciphertext and the same 10-bit key to recover the original plaintext. Unlike full DES which uses 64-bit blocks and 56-bit keys, S-DES uses smaller block and key sizes to make the algorithm easier to understand and implement manually for learning purposes. S-DES Encryption Process ...
Read MoreRate Anomaly in CSMA/CA
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is a network protocol for carrier transmission that operates in the Medium Access Control (MAC) layer. CSMA/CA prevents collisions prior to their occurrence and is ideally used in wireless communications. Rate anomaly occurs when the performance of a high-speed station is impaired due to a low-speed station, thus reducing the average throughput of the entire wireless network. This phenomenon significantly affects network efficiency in mixed-rate environments. How Rate Anomaly Occurs The CSMA/CA protocol allows each station to send a single frame at a time. Before sending a frame, the ...
Read MoreHow to Read a Traceroute?
Traceroute is a network diagnostic tool that maps the path data packets take from your computer to a destination server, helping identify bottlenecks and network issues along the route. When you run a traceroute, it sends packets with incrementally increasing Time-To-Live (TTL) values. Each router decrements the TTL, and when it reaches zero, the router returns an "ICMP time exceeded" message. This process repeats until packets reach the destination, revealing every router in the path. Traceroute Path Discovery Source ...
Read MoreGoals of Networks
In today's digital era, networks serve as the backbone of modern communication, connecting people, organizations, and devices across the globe. A network enables the transfer of data, voice, and multimedia signals between entities while maintaining essential security standards. Regardless of their topology—whether mesh, star, or ring—all networks share fundamental objectives that define their purpose and effectiveness. The goals of networks represent the core requirements that ensure networks deliver reliable, secure, and efficient communication services. These objectives focus on maintaining data authenticity, integrity, accessibility, and protection throughout the transmission process. Primary Goals of Networks ...
Read MoreWhat is Network Management?
Network management is the procedure of administering, managing, and operating a data network using a network management system. Modern network management systems use software and hardware to constantly collect and analyze data and push out configuration changes for improving performance, reliability, and security. It involves configuring, monitoring, and possibly reconfiguring components in a network with the goal of providing optimal performance, minimum downtime, proper security, accountability, and flexibility. Network management ensures that network resources are used efficiently and that the network meets the organization's requirements. Network Management System Overview ...
Read MoreExtended Inter-Frame Spacing (EIFS)
Extended Inter-Frame Spacing (EIFS) is a waiting period used in the MAC layer of IEEE 802.11-based wireless local area network (WLAN) standard. It is an additional waiting period used in addition to the mandatory DIFS technique when frames are corrupted or cannot be properly decoded. DIFS (Distributed Coordination Function Inter-Frame Spacing) is inserted before sending frames to avoid collisions in areas where Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is used. EIFS is specifically used when a station receives erroneous or corrupted frames that it cannot decode properly. How EIFS Works In normal frame delivery, the ...
Read MoreWhat are the functions of Network Management?
Network Management involves monitoring and controlling a network system to ensure it operates properly without downtime. The functions performed by a network management system are categorized into several key areas that work together to maintain network reliability, security, and performance. Network Management Functions Network Management Central Control Fault Management Configuration Management Performance Management ...
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