Hither, Technophiles!

This post deals with definitions of few terms, understanding of which are important for having a strong foundation in C++.  This is a living blog and you can expect appends with logs at the bottom of the post. Object:  Most commonly accepted definition of an object is a region of memory that has a type. Variable:  A named storage that can be manipulated. Scope: A scope is a part of program in which a name has a particular meaning. '::' is the scope resolution operator used to refer to names from a different scope. #include<iostream> using namespace std; int variable_1 = 10 ; int main(){ int variable_1 = 20 ; cout << :: variable_1 << endl; //prints 10 on console. ::variable_name fetches the variable from global scope. return 0 ; } Lifetime: The lifetime of an object is the time during the programs execution that the object exists. Declaration: A declaration makes a name known to the program. We can dec...

A Firewall is designed to prevent unauthorized outside users from accessing a network or host. It is a device (software or hardware), installed between the internal network and the Internet. Firewall performs filtering of the packets that attempt to enter or leave a network. This is done by defining various policies that enforce control over the network traffic. A Bastion Host defines a simple firewall implementation, where the bastion host is any computer that is fully exposed to attack by being on the public side of the DMZ, unprotected by a firewall or filtering router. [1] It is also referred to as the, Bastion firewall. The bastion node, is usually a very powerful server with improved security measures and custom software. A typical Bastion firewall implementation DMZ (Demilitarized Zone), also known as Perimeter Network, refers to the part of the network, that is neither private nor public. It introduces an additional layer of security, as external network has ac...