DC - Network Addressing Layer 3 network addressing is one of the major tasks of Network Layer. Network Addresses are always logical i.e. these are software based addresses which can be changed by appropriate configurations. A network address always points to host /...
Part 9: Error Detection and Correction in Communication
DC - Error Detection & Correction There are many reasons such as noise, cross-talk etc., which may help data to get corrupted during transmission. The upper layers work on some generalized view of network architecture and are not aware of actual hardware data...
Part 8: FDM & TDM in Data Communication
Signal multiplexing is a process in which multiple signals can be transmitted together over the same communication medium simultaneously. Time division multiplexing Time division multiplexing is a technique of separating the signals in time domain. In TDM the...
Part 7: Companding and Pulse Position Modulation in Data Communication
Companding In telecommunication and signal processing companding (occasionally called compansion) is a method of mitigating the detrimental effects of a channel with limited dynamic range. The name is a portmanteau of the words compressing and expanding. The use of...
Part 6: Basics of Wireless Communication in Data Communication
Basics of Wireless Communication: Wireless communication takes places over free space through RF (radio frequency), one device, Transmitter send signal to other device, Receiver. Two devices (transmitter and receiver) must use same frequency (or channel) to be able to...
Part 5: Modulation in Data Communications
Analog to Analog Modulation Analog-to-analog conversion, or modulation, is the representation of analog information by an analog signal. It is a process by virtue of which a characteristic of carrier wave is varied according to the instantaneous amplitude of the...
Part 4: Modem Modulator and Demodulator in Data Commmunications
Modem Modulator and Demodulator A modem may refer to any of the following: A modem or broadband modem is a hardware device that connects a computer or router to a broadband. For example, a cable modem and DSL modem are two examples of these types of Modems. Today, a...
Part 3: Analog and Digital Signals in Data Communications
Analog and Digital Signals An analog signal is any continuous signal for which the time varying feature of the signal is a representation of some other time varying quantity i.e., analogous to another time varying Signal. Signals can be analog or digital. Analog...
Part 2: Data Communication – Network Models
Networking Network A network is a set of devices (often referred to as nodes) connected by links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the network. Network criteria Performance...
Part 1: Introduction to Data Communications
Data Communications Data Communications : Data Communication is the exchange of data (in the form of 0’s and 1’s) between two devices via some form of transmission medium (such a cable). In other way can define, Data Communication is a process of exchanging data or...
Laravel – Scopes (3 Easy Steps)
Scoping is one of the superpowers that eloquent grants to developers when querying a model. Scopes allow developers to add constraints to queries for a given model. In simple terms laravel scope is just a query, a query to make the code shorter and faster. We can...
CAMBRIDGE IELTS 17 TEST 3
READING PASSAGE 1: The thylacine Q1. carnivorous keywords: Looked like a dog had series of stripes ate, diet ate an entirely 1 .......................................... diet (2nd paragraph 3rd and 4th line) 1st and 2nd paragraph, 1st paragraph,resemblance to a...
Cambridge IELTS 16 Test 4
Here we will discuss pros and cons of all the questions of the passage with step by step Solution included Tips and Strategies. Reading Passage 1 –Roman Tunnels IELTS Cambridge 16, Test 4, Academic Reading Module, Reading Passage 1 Questions 1-6. Label the diagrams...
Cambridge IELTS 16 Test 3
Reading Passage 1: Roman Shipbuilding and Navigation, Solution with Answer Key , Reading Passage 1: Roman Shipbuilding and Navigation IELTS Cambridge 16, Test 3, Academic Reading Module Cambridge IELTS 16, Test 3: Reading Passage 1 – Roman Shipbuilding and...