Technology Blog
Definition of modem “A modem is a network device that converts digital signal from computer to analogue signal and converts analogue signals to digital signals” A modem is a short form of modulator and demodulator. Data transfer in analogue form in the telephone cables. There are different cables like coaxial cable and twisted pair cables. In these cables data travels in analogue form. And our computer understands digital [...]
What is a network device “A network device is a hardware device that is used to connect computers, laptop, smartphones, printers, scanners with one another.” These network devices work on different OSI layers. For example repeater and hub work on the physical layer and switch works on the data link layer. Diagram of network devices Some network devices are:- RouterHubSwitchAccess Point (AP)ModemBridgeGatewayBrouterRJ45 connectorNICLoad balancerRepeaterFirewallRouting tableNetwork-attached storage (NAS)Ethernet cardWi-Fi [...]
What is mesh topology “A type of network topology in which every node or device is connected to every other node or device in the network” Every node transfers its data but also receives data from other connected nodes. This type of topology is used in a wireless network and wide area network. All the nodes are directly connected i.e. point-to-point connection is made between every two nodes. [...]
Definition of hybrid topology “A type of topology which is built by connecting two or more different topologies.” For example, the arrangement of computers in an office makes ring topology. And in another office computers are attached in the form of star topology. So if you connect these two offices i.e. combining ring and star topology will make a hybrid topology. Diagram of Hybrid Topology You can combine [...]
In a remote procedure call, the client request some processing to the server computer. The server computer is placed in a remote location. The client sends parameters with the request it sends to the server. The parameters are passed either by value, by reference, or linked in the cloud location. Diagram of RPC 5 components are involved in sending a message from client to server:- ClientClient stubRPC protocolServer [...]
A type of private network which an enterprise company uses to connect its branches is known as an enterprise private network. The initial networking was made possible in the 1970s by AT&T. Enterprise private network can be made in various ways that include:- Virtual private network (VPN)Local area network (LAN)Wide area network (WAN)Cloud-based network The purpose of EPN is to have high-speed internet and data sharing within an [...]
What is multitasking Multitasking is performing multiple tasks at a time. In a computer, multiple tasks/programs run at a time. For example, chrome browser, audio player, MS word program runs at the same time. The running of multiple programs/tasks at the same time is handled by the operating system. If you have a single CPU (central processing unit) or single processor then the operating system gives a small [...]
We often store our data on the hard drive of our PC, laptop or workstation. The data we store on a personal computer can be hacked, stolen or attacked by a virus. Maybe our hard drive fails to function so there is a chance of data loss. Similarly, big companies have to store their data and there is a need for data security and data retrieval for the [...]
What is passive optical local area network (POL) Passive optical LAN uses fiber optics to make a network. In POL the speed of data transfer is high. You can easily video conference, audio share and browse the internet fast. There are 3 main components of POL i.e. Optical Line Terminal (OLT), Optical Splitter, Optical Network Unit (ONU) or Optical Network Terminal (ONT). POLAN Data travel from OLT to [...]
POL or passive optical local area network is an inexpensive solution to connect different devices to the internet. POL was first time introduced in 1987 by British Telecommunications. There are 3 major components of POL that are:- Optical Line Terminal (OLT)Optical SplitterOptical Network Terminal (ONT) POLAN OLT or optical line terminal is placed in main exchange i.e. at ISP office. OLT is connected to the optical splitter through [...]
