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Mostly in the digital age, an enterprise Software-defined Wide Area Network (SD-WAN) can modernise your network and propel your business, while a single centralised SD-WAN can unify network connectivity and allow application delivery to be coordinated across an entire network.A WAN is a link separated by a significant distance between local area networks (LANs), anything from a few miles to thousands of miles. The word software-defined means the WAN is designed and managed programmatically. Therefore, it can be easily modified to meet evolving needs rapidly.Given below is the diagram of SD-WAN −Features of SD-WANThere are some features commonly attributed to ... Read More
To check if any specific column of two DataFrames are equal or not, use the equals() method. Let us first create DataFrame1 with two columns −dataFrame1 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] } )Create DataFrame2 with two columns −dataFrame2 = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Mercedes', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] ... Read More
Wide area network (WAN) is a telecommunication network that spreads over a large area of computer networking. A WAN network connects different small LAN and MAN networks.A well-known example of a WAN network is the Internet. It covers cities, states, countries and even continents. It can be a public network or a private network.WAN Network TechnologiesThere are two technologies which are used in the WAN network design. These technologies are explained below −Circuit SwitchingCircuit switched networks work on the principle of virtual connection that means all the messages will follow the same path and resources in this path are reserved ... Read More
Transmission Control Protocol/Internet Protocol (TCP/IP) are two different communication protocols. TCP defines the communication in a network and how to send data in the form of packets. IP manages how to make the route for packets to make sure it reaches its defined destination. Before data is sent its IP address is checked then it is determined where to forward the data.TCP/IP uses the same model as the OSI model. It uses the client/server model type of communication where a user or machine (a client) is provided a service by another computer (a server) in the network.TCP/IP has four layers ... Read More
To calculate the mean of column values, use the mean() 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 mean of a single column “Units” using mean() −print"Mean of Units column from DataFrame1 = ", dataFrame1['Units'].mean()In the same way, we have calculated the mean value from the 2nd DataFrame.ExampleFollowing is the complete code −import pandas ... Read More
Transmission Control Protocol/Internet Protocol (TCP/IP) are two different communication protocols. TCP splits a message to packets which were transmitted across the internet whereas the IP is accountable to address of every packet hence a chance to forward the exact destination.Previously, there was no TCP/IP and no method for the computers to perform effortlessly over public networks. The main function of TCP/IP is that it governs how the information is sent and received in the form of packets between source and destination.So in short, we can say that TCP defines the communication in a network and how to send data in ... Read More
Firewall in general is defined as a wall between personal computer and outside world. So it will filter the traffic coming from the outside world based on the user configuration like which sites are trusted sites and which we need to allow.Example of firewall system design is shown below −Components of a Firewall SystemThe components of firewall system are explained below −Perimeter RouterIt is used to provide a link to the public networking system like the internet, or a distinctive organization. It performs the routing of data packets with the help of an appropriate routing protocol. It also provides the ... Read More
Firewall is a wall between a personal computer and the outside world. So it will filter the traffic coming from the outside world based on the user configuration like which sites are trusted sites and which we need to allow.The diagram given below depicts the firewall:Functions of firewallThe functions of a firewall in computer networking are as follows −Block unsafe URLs.Close down a port completely.Open a port to only specific IP addresses.Allow some ip addresses at specific times.Advantages of Hardware FirewallThe advantages of a hardware firewall are as follows −Hardware firewalls can protect your entire network with a single firewall.Hardware ... Read More
Router architecture is designed in a way that the routers are equipped to perform two main functions. These functions are as follows:Process routable protocols.Use routing protocols to determine the best path.Let us try to understand the router with the help of architecture:Architecture of RouterGiven below is a diagram which explains the architecture of router:The different factors which help in successful functioning of router are explained below:Input PortThe input port performs many functions. The physical layer functionality of terminating an incoming physical link to a router it can perform.It performs the data link layer functionality needed to interoperate with the data ... Read More
The basic communication model in computer networking is where the Sender (encodes the message) channel sends a message over a channel or medium and receiver (decodes the message) gives Feedback.ComponentsThe components involved in the successful implementation of the basic communication model are as follows −Sender − Who sends the message.Encodes − Translates messages into symbols like words, pictures, sound, etc.Channel or medium − It used to transmit messages. Some channels are face-to-face communication, over telephone, letters, television, newspapers, radio, etc.Decode − Receiver decodes these symbols to understand what the sender wants to say.Receiver − A person who receives the message.Feedback ... Read More