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Articles on Trending Technologies
Technical articles with clear explanations and examples
Time Based Access-List
A time-based access list is a network security feature that enables administrators to control traffic flow based on specific time parameters such as time of day, day of week, or date. This advanced filtering mechanism enhances traditional access control lists by adding temporal restrictions to network access policies. How Time-Based Access Lists Work A Time-Based Access Control List (ACL) extends standard ACL functionality by incorporating date and time parameters into traffic filtering decisions. While traditional ACLs filter traffic based solely on source IP, destination IP, protocol, and port numbers, time-based ACLs add temporal conditions to these rules. ...
Read MoreRemote Direct Memory Access (RDMA)
Remote Direct Memory Access (RDMA) is a networking technology that allows one computer to directly access the memory of another computer over a network without involving the operating system, CPU, or cache of either machine. This capability significantly improves system throughput and performance by freeing up critical resources. RDMA enables read and write operations on remote machines without interrupting the remote CPU, resulting in increased data transfer rates and reduced networking latency. It achieves this through zero-copy networking, which transfers data directly into system buffers via network adapters. Originally used exclusively in high-performance computing (HPC) environments where performance ...
Read MoreWhat is a Shielded Twisted Pair (STP) cable?
A Shielded Twisted Pair (STP) cable is a type of network cable that includes two independent wires wrapped in a protective foil or braided metal shielding. Originally developed by IBM for token ring networks, STP cables prevent electromagnetic interference and enable faster, more reliable data transmission. The key distinguishing feature of STP cables is their additional protective layer that surrounds the twisted wire pairs, providing superior electromagnetic interference (EMI) protection compared to unshielded twisted pair (UTP) cables. STP Cable Structure Outer Jacket ...
Read MoreMicrowave Transmission
In the electromagnetic spectrum, waves within the frequencies 1 GHz to 300 GHz are called microwaves. Microwave transmission is a form of wireless communication that uses these high-frequency radio waves to transmit data over long distances. Microwave communication systems are widely used for point-to-point communication links, cellular networks, satellite communications, and wireless networking due to their ability to carry large amounts of data at high speeds. Microwave Line-of-Sight Communication Transmitter Receiver Microwave Beam Building ...
Read MoreBridge the Gap: Understanding Network Protocols and Communications
In today's interconnected world, network protocols are the fundamental rules and conventions that govern how devices communicate and share data across networks. These standardized procedures ensure that different systems can understand each other, enabling seamless data transmission in networks both large and small. With dozens of network protocols in use today — such as FTP, TCP, HTTP, and IP — understanding their purpose and application is essential for effective network management and troubleshooting. Network Protocol Communication Device A Sender Device B ...
Read MoreDifference between Banana Pi and Raspberry Pi
Banana Pi and Raspberry Pi are popular single-board computers that look similar but differ significantly in their specifications and capabilities. Both platforms serve electronic hobbyists and developers who need affordable computing solutions for their projects, yet each offers distinct advantages depending on the application requirements. What is Banana Pi? Banana Pi is a single-board computer developed by the Chinese company Shenzhen SINOVOIP Co., Ltd. in 2014 as a competitor to Raspberry Pi. It features a dual-core Cortex-A7 ARM processor and supports various operating systems including Android and Linux distributions. The platform includes integrated connectivity options such as ...
Read MoreAlias/Secondary IP Address
IP aliasing is the process of assigning multiple IP addresses to a single network interface. This technique allows one physical network adapter to handle traffic for several different IP addresses, each potentially serving different purposes or applications. Multiple network addresses can be configured on a single physical interface using IP aliasing. One common use case is to make a single computer appear as multiple systems on the network, enabling better resource utilization and service separation. IP Aliasing on Single Interface eth0 Interface 192.168.1.10 192.168.1.11 (eth0:1) ...
Read MoreWhat is AAA (Authentication, Authorization, and Accounting)?
Authentication, Authorization, and Accounting (AAA) is a comprehensive security framework that controls access to computer resources, enforces policies, and tracks user activities. This three-step process ensures that only authorized users can access network resources while maintaining detailed logs of their activities. AAA is commonly implemented with network protocols like RADIUS (Remote Authentication Dial-In User Service) and is typically deployed as a dedicated server to centrally manage network security policies across an organization. AAA Framework Process Flow Authentication Who are you? Authorization ...
Read MoreInfrared Transmission
Infrared transmission is a wireless communication method that uses infrared waves in the electromagnetic spectrum between frequencies 300 GHz and 400 THz. These waves have wavelengths shorter than microwaves but longer than visible light, making them suitable for short-range data transmission applications. Infrared propagation follows line-of-sight principles, meaning the transmitter and receiver must have a direct, unobstructed path for communication. This characteristic makes infrared ideal for controlled environments but limits its range and outdoor applications. Infrared Transmission - Line of Sight Communication IR Transmitter ...
Read MoreKeeping the Network Safe: The World of Network Security
Network security is the practice of protecting computer networks and their data from unauthorized access, cyber attacks, and other security threats. In today's digital landscape, where cyber threats like ransomware, malware, and data breaches are constantly evolving, robust network security has become essential for organizations of all sizes. Network security involves implementing multiple layers of defense including hardware devices, software solutions, policies, and procedures to create a comprehensive security framework that protects sensitive information and maintains business operations. Network Security Defense Layers Firewall Traffic Filter ...
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