Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
To convert string data to actual dates i.e. datetime type, use the to_datetime() method. At first, let us create a DataFrame with 3 categories, one of the them is a date string −dataFrame = pd.DataFrame({ 'Product Category': ['Computer', 'Mobile Phone', 'Electronics', 'Stationery'], 'Product Name': ['Keyboard', 'Charger', 'SmartTV', 'Chairs'], 'Date_of_Purchase': ['10/07/2021', '20/04/2021', '25/06/2021', '15/02/2021'], }) Convert date strings to actual dates using to_datetime() −dataFrame['Date_of_Purchase'] = pd.to_datetime(dataFrame['Date_of_Purchase'])ExampleFollowing is the complete code −import pandas as pd # create a dataframe dataFrame = pd.DataFrame({ 'Product Category': ['Computer', 'Mobile Phone', 'Electronics', 'Stationery'], 'Product Name': ['Keyboard', 'Charger', 'SmartTV', ... Read More
In computer system and internet technology management, the following may be the security threatsHardware may cause minor threats in most of the situations. It is unable to control the Leaked information.The software threat harms critical data of an organization.Hacking is one of the biggest threats now-a-days. Through malicious programs hackers steal critical information from others.The unauthorized use of personal data is one of the threats.Phishing attacks by malware email to multi-internet users for mid guiding them.Spoofing is also a bigger threat of technology.Methods to secure a networkGiven below are the methods to secure a network −A network can be secured ... Read More
Let us understand the concept of Quality of Service (QoS) in networking.QOS in terms of networkingQuality of service (QoS) in the case of networking implies the ability of a network to provide reliable service to the traffic over various technologies including Ethernet, wireless, IP, Asynchronous Mode etc.QOS in case of network congestion has to keep in record various elements causing this congestion. It may be due to the reason of low bandwidth or high traffic on a single route.So, routing protocol being used heavily impacts the Quality of service of networking.It depends on how efficient a routing algorithm is to ... Read More
BGP stands for Border Gateway Protocol. It can be defined as a standardized exterior gateway protocol which is developed to interchange routing information and reachability information between various autonomous systems (AS) on the Internet. It is classified as a path vector protocol as well as a distance-vector routing protocol.Types of BGPThere are two types of BGP and they are as follows −Internal BGP − Internal BGP (IBGP) is a BGP connection between BGP speakers in the same AS.External BGP − External BGP (EBGP) is a BGP connection between BGP speakers in different AS’s.Message TypesThere are four message types of BGP ... Read More
Classless Inter-Domain Routing (CIDR) is a group of IP addresses that are allocated to the customer when they demand a fixed number of IP addresses.In CIDR there is no wastage of IP addresses as compared to classful addressing because only the numbers of IP addresses that are demanded by the customer are allocated to the customer.The group of IP addresses is called Block in Classless Inter - Domain (CIDR).CIDR follows CIDR notation or Slash notation. The representation of CIDR notation is x.y.z.w /n the x.y.z.w is IP address and n is called mask or number of bits that are used ... Read More
The DSL technology is defined as the digital subscriber lines. Here, the data is transmitted to the users over the telephone signal lines.Voice communication over the telephone is the best example of the digital subscriber lines. Also, there are DSL services that are provided by DSL technology.Here there is asymmetric and symmetric digital subscriber line both are supported by the DSL network.The services provided by the companies that provide the DSL are −The broadband internet connectionVoice communicationVideo streaming at low speed is offered by the companies using the DSL network.Purpose of DSLThe purposes of DSL are explained below −DSL is ... Read More
ISDN stands for integrated service digital network. It is a telephone switched network which integrates voice and data over a digital line simultaneously. It also provides packet switched networks.ISDN supports a variety of services which are as follows −Voice callsVideo textsElectronic mailDatabase accessFacsimileTeletextData transmission and voiceConnection to internetElectronic Fund transferImage and graphics exchangeDocument storage and transferAudio and Video ConferencingThe figure given below depicts ISDN −Channels of ISDNISDN has mainly three channels, which are as follows −B-channel − It offers a speed of around 64kbps, which can be used for home purpose.D-channel − It offers speeds ranging from 16 to 64 ... Read More
To compute last of group values, use the groupby.last() method. At first, import the required library with an alias −import pandas as pd;Create a DataFrame with 3 columns −dataFrame = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'BMW', 'Tesla', 'Lexus', 'Tesla'], "Place": ['Delhi', 'Bangalore', 'Pune', 'Punjab', 'Chandigarh', 'Mumbai'], "Units": [100, 150, 50, 80, 110, 90] } ) Now, group DataFrame by a column −groupDF = dataFrame.groupby("Car")Compute last of group values and resetting index −res = groupDF.last() res = res.reset_index()ExampleFollowing is the complete code. The last occurrence of repeated values are displayed i.e. last of group values ... Read More
Let us understand the concept of piconet and scatternet before learning the differences between them.PiconetA piconet is a network created by connecting multiple wireless devices using Bluetooth technology. In a piconet network a master device exists, this master device cm gets connected to 7 more slave devices.It includes the master the number of devices that can be connected is limited to 8. Due to less number of devices active at a time the usage of channel band width is not more.Number of devices that can be connected is limited to 8. It is applicable for devices belonging to small areas.Given ... Read More
A group of communication in a computer network is multicasting, where a sender sends data to multiple receivers simultaneously. Simply in Multicasting we send data across a computer network to several users at the same time. It supports one-to-many and many-to-many data transmission across LANs or WANs.User Datagram Protocol (UDP)The most common protocol (transport layer protocol) to use multicast addressing is User Datagram Protocol (UDP).User datagram protocol is defined as the simplest transport layer communication protocol available of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite. It is one of the core members of the Internet protocol suite. It Increases ... Read More