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When a data is transmitted from one device to another device is known as transmission mode, it is also known as the communication mode.Generally, the communication channel is a direction associated, and transmission media role is to provide the direction. So, we call transmission mode a directional mode.The transmission mode is work in the physical layer.Types of Transmission modeThe Transmission mode is divided into three categories, which are as follows −Simplex ModeHalf-duplex ModeFull-duplex mode (Duplex Mode)The types of transmission mode are shown in the chart below −Let us see the half duplex mode of transmission.Half duplex modeIn a Half-duplex channel, ... Read More
When a data is transmitted from one device to another device is known as transmission mode, it is also known as the communication mode.Generally, the communication channel is a direction associated, and transmission media role is to provide the direction. So, we call transmission mode a directional mode.The transmission mode is work in the physical layer.Types of Transmission modeThe Transmission mode is divided into three categories, which are as follows −Simplex ModeHalf-duplex ModeFull-duplex mode (Duplex Mode)The types of transmission mode are shown in the chart below −Let us see the simplex mode of transmission.Simplex modeIn Simplex mode, the communication is ... Read More
Wireless sensor networks (WSNs) have the power of distributed communication, computing, and sensing features. They are characterized as infrastructure less, fault tolerant and self-organizing networks which provide opportunities for low-cost, easy-to-apply, rapid and flexible installations in an environment for various applicationsThe wireless sensor and the sensor node architecture are given in the diagram below −Characteristics of WSNThe characteristics of WSN are as follows −Resource constraints − Nodes of WSN are smaller in size and get power from the batteries. It justifies that service provided by the nodes like communication and computation amount of memory is very limited.Communication paradigm − The ... Read More
To calculate the median of column values, use the median() method. At first, import the required Pandas library −import pandas as pdNow, create a DataFrame with two columns −dataFrame1 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] } )Finding the median of a single column “Units” using median() −print"Median of Units column from DataFrame1 = ", dataFrame1['Units'].median() In the same way, we have calculated the median value from the 2nd DataFrame.ExampleFollowing is the complete code ... Read More
Local Area networks are of two types − Peer to Peer network and client server network.Let us discuss about client server network −Client/Server NetworkIn client-server network relationships, certain computers act as servers and others act as clients.A server is simply a computer that provides the network resources and provides service to other computers when they request it. A client is the computer running a program that requests the service from a server. Local area network (LAN) is based on client server network relationship.A client-server network is one on which all available network resources such as files, directories, applications and shared ... Read More
TLS (Transport layer security) is the successor or the updated version of SSL and the basic process of securing the network by both is more or less the same.Transport Layer Security (TLS)/Secure Sockets Layer (SSL) are computer networking protocols for securing connections between network application clients and servers over an insecure network. These protocols provide a mechanism for encrypting and authenticating data sent between client and server.SSL/TLS layers are responsible for the transport of data between processes and the routing of network traffic over a network between client and server, and below application layer protocols such as Hypertext Transfer Protocol ... Read More
Logic Link Control (LLC) Layer and Medium Access Control (MAC) layers are the sublayers of the Data link layer in the OSI reference model.OSI reference model: It stands as Open Systems Interconnection. OSI is a 7 layer architecture which contains 7 layers. Each layer has its own specific functionality. All these 7 layers in the OSI model are used to transmit data.Data Link LayerIn computer networking, the data link layer is the 2nd layer of the OSI reference model. The main function of this layer is to transmit data between nodes. The data link layer transmits data between network entities ... Read More
To find the common rows between two DataFrames, use the merge() method. Let us first create DataFrame1 with two columns −dataFrame1 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Tesla', 'Bentley', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] } )Create DataFrame2 with two columns −dataFrame2 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'], "Units": [100, 250, 150, 80, 130, 90] } )To find the common ... Read More
The network troubleshooting tools are useful for every network administrator. These tools can be used to troubleshoot different network conditions.The network troubleshooting tools which are most used are as follows −RouteThe route utility is helpful to display the status of the routing table on host. The route utility is limited at the situations where the host has one ip address with one gateway. The route plays a key role at multiple IP addresses and multiple gateways.pathping / mtrThe pathping and meter utilities take the information obtained from tools and provide a more detailed picture of the characteristic path from particular ... Read More
IPSec is one of the secure techniques on the market for connecting network sites.IPSec was designed to supply the subsequent safety features once transferring packets across networks the following factors −Authentication − Verifies that the packet received is truly from the claimed sender.Integrity − Ensures that the contents of the packet didn't amend in transit.Confidentiality − Conceals the message content through secret writing.Use of Digital CertificateIt is explained below how IP security (IPsec) makes use of Digital Certificate.A digital certificate is an associate electronic document issued by a Certificate Authority (CA). It contains the general public key for a digital ... Read More