The Tech Storror

Connectors The cable connector is the daughter device between the network card and the cable. That is, it connects the network cable and (NIC). Notable among cable connectors are coaxial cable, 10 bit, Ethernet etc. Among them, 10 bit connector is comparatively much faster, reliable and widely used. The 10-pin connector looks a lot like a telephone wire. Some network cards support multiple connector types, thus providing multiple ports. Such cards are called combo cards. Recently, Ethernet technology has gained great popularity in the world of networking, to say that now Ethernet is a dominating (Dominating) technology. For that reason, if the network card of the computer is of combo type, then it is possible to upgrade it to use Ethernet technology. The following three types of connectors are commonly used in networks. These are-- a) RJ-45: It is used to connect UTP cable to network interface card or NIC. This connector has a total of 8 contact pins. These 8 pins are used in different...

Transmission media: When a PC communicates or wants to communicate with another PC, it has to take the help of some transmission media. The most commonly used media in the network are twisted pair cable, coaxial cable, fiber optic cable. Nowadays, the use of optical fiber is increasing greatly. Radio wave, microwave and infrared technologies are prominent among wireless media. Among these mediums, optical fiber has the highest data transfer speed. The type of medium used in a network depends on the type and location of that network. The connection system for exchanging information between the sender and the remote receiving end is called a channel. The means or methods used to implement the channel are called media. such as-- (i) Cable or wire. (ii) Common telephone lines. (ii) Radio waves. (iv) Microwave. (v) Geo-satellite systems etc. Cable or Wire: Cable is an important medium in data communication. Cables are generally used for data transfer over short range networking such as LAN...

Concept of data communication system: Data transfer between a central computer and remote terminals was first introduced in the 1960s. These terminals lacked storage and processing capabilities. Such a method is known as teleprocessing. The terminal of this method is called the silent or dumb terminal. Later, processing and data storage and data storage capabilities were created in these terminals, known as self-contained systems. Data is a precious resource in today's era. Information or data plays an important role in the improvement of an organization, making realistic decisions for the organization, connecting the internal environment of the organization with the rapidly changing world outside, etc. The special method by which data is exchanged from one computer to another or more computers is called the data communication method. The advantage of this method is that data can be transmitted quickly and accurately. The main five components or parts of data communication are— 1. ...

 Basic Concept on Data Security & Authentication Entity Level Security The security system is greatly strengthened by database authorization. Even then, security breaches do occur. Various unauthorized persons breach security through database misuse and accidents. But this is not desirable at all in case of database. Therefore, a security method called encryption is used in the database management system to further strengthen the security system. Data Recovery Database data is lost when the computer system fails or crashes due to any reason. The process by which this lost data can be recovered is called data recovery. Failures are of various types, namely-  (i) Transaction Failure (ii) Logical Error (iii) System Error  (iv) System Crash (v) Disk Failure Authorization Authorization is a process by which database security can be controlled. A database user can have different types of authorizations. This is dependent on database security. When the query processor transl...

Hotspot, Wi-Fi, Wi-Max, Bluetooth Hotspot: Hotspot is a type of wireless network that provides internet connection to mobile computers and devices such as smartphones, PDAs, tablets, netbooks, notebooks or laptops. Currently, the three popular hotspot technologies are – 1. Wi-Fi 2. Wi-Max 3. Bluetooth Wi-Fi: Wi-Fi or wireless fidelity is a popular wireless technology that uses radio waves to connect any electronic device to a high-speed Internet connection or computer network to exchange data. It is technically known as IEEE 802.11b. Wi-Fi technology is relatively faster (11 Mbps) and less expensive than standard Ethernet and other common wired LAN technologies. Thus, the Wi-Fi wireless LAN connects laptop PCs, PDAs, smart phones, tabs and other devices with Wi-Fi modems to the rapidly growing business, public and the planet to easily connect to the Internet and other networks. A faster version (802.11g) with a speed of 54 Mbps promises widespread use of this technology. Features of Wi...