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Network security is protection of the access to files and directories in a computer network against hacking, misuse, and unauthorized change to the system.Importance of network securityThe importance of network security is explained below −Confidentiality − Confidentiality is probably the common aspect of information security. We need to protect our confidential information through network security. An organization needs to guard against those malicious actions that endanger the confidentiality of its information.Integrity − Information’s needs to be changed constantly. To keep changes secure we need network security.Availability − The third-party component of information security is called availability. The information created and ... Read More
A virtual local area network (virtual LAN) is the logical grouping of network nodes.In other words, a virtual LAN is any broadcast domain that is partitioned and isolated in a network. A VLAN allows several networks to work virtually as one LAN.It gives an advantage to connect multiple devices whether it is wired or wireless to a combined single network. It works as a broadcast domain.Benefits of VLANThe benefits that are provided by implementing VLANs are as follows −Reduce the number of routers.All devices can be controlled by the same level.It offers a broadcast domain that reduces the traffic.It gives ... Read More
A default gateway is a node that is present in the computer network that serves as a forwarding host to another network when the destination IP address of a packet does not match with any route.FunctionsThe functions of default gateway are explained below −The major function of the default gateway is to pass the information to another router when the current packet does not know the destination.It is a node or a router in the network that connects the host to remote network components.Whenever a packet needs to be transmitted to another network, the packet must pass through the default ... Read More
The two address translations that are helpful to make internet routing more efficient are NAT (Network address translation) and PAT (Port address translation).Let us discuss the two translation schemes.Network Address Translation (NAT)NAT is used to convert a private IP address into a public IP address and also a public IP address into a private IP address. We use NAT due to the shortage of IP addresses.IP Version 4 is a 32- bit address and it has almost 4.3 billion IP addresses, but the population of the world is much higher and it is approximately about 7.8 billion as of the ... Read More
To create a pipeline in Pandas, we need to use the pipe() method. At first, import the required pandas library with an alias −import pandas as pdNow, create a DataFrame −dataFrame = pd.DataFrame( { "Car": ['BMW', 'Lexus', 'Audi', 'Mustang', 'Bentley', 'Jaguar'], "Units": [100, 150, 110, 80, 110, 90] } ) Create a pipeline and call the upperFunc() custom function to convert column names to uppercase −pipeline = dataFrame.pipe(upperFunc)Following is the upperFun() to convert column names to uppercase −def upperFunc(dataframe): # Converting ... Read More
Let us begin by understanding what network based attacks are.Network based attacksThe different network-based attacks are as follows −SniffingIn this type of network attack, packets of data are captured and monitored by the hacker. These packets flow between server and client. The attacker intercepts the network to read them.This can actually lead to damage to the data in the organization. This is because it may lead to compromise of private information of the employees, etc.EavesdroppingIn this type of attack, passive activities are performed on the network. The attacker starts to listen to the data flowing between various networks and extract ... Read More
The RSA algorithm stands for Rivest-Shamir-Adelman algorithm. RSA algorithm is the most commonly used public key algorithm and this algorithm can be used both for encryption and for signing.RSA uses a variable size encryption block and variable size key. The key pair is derived from a very large number say n that is the product of two large prime numbers selected through special rules.The public key includes n and derives one of the factors of n, an adversary cannot determine the prime factor of n, from this information alone, makes the RSA algorithm so secure.Hence, it is generally considered to ... Read More
The different ways of security implementations in storage network includes the following −An overall IT and security risk assessment study has been completed including threat probabilities and overall business impacts.This will set a context and basis to develop a credible storage network security plan.Overall IT security objectives and advised spending levels and budgets are in place so that a storage security plan can be developed in context.Requirements for compliance reporting have been established so that the storage network security implementations can give the overall reporting system.Types of Storage network security implementationsAccordingly, there are three types of storage network security implementations ... Read More
Some the issues and solution related to Transmission Control Protocol (TCP) are as follows −Silly window syndrome.Congestion window management.Silly Window SyndromeThis is a problem which arises in TCP flow control. In this the sender window size shrinks to an extremely low value due that the data being sent in each trip is even smaller than the TCP header. Due to which TCP protocol becomes extremely inefficient.CausesThe silly window syndrome can occur due to two main reasons, which are as follows −The application which needs to send the data produces a short amount of data (1 byte), again and again and ... Read More
TCP is a transmission control protocol and a connection-oriented protocol. It provides a flow control and error control facility for information in between the sender and the receiver.A protocol which will be used in the data link layer which will support the reliable and sequential delivery of data frames. This protocol is the sliding window protocol.This sliding window facility is also used with the TCP which helps to transfer multiple frames by a sender at a time before receiving an acknowledgment from the receiver.The TCP will maintain a proper data flow.If the sender data transmitting speed will be high compared ... Read More