Information Technology

Visit every value in an array or vector with a range-based for loop, then learn how copies and references affect the original collection.

Use Windows pathping to collect route, delay, and packet-loss statistics—and turn the results into a useful troubleshooting note.

Use du to inspect folder disk usage, compare directories, and understand how its results differ from df.

Learn what a default gateway does, when traffic needs a router, and how to check gateway settings on Windows and Linux.

Open-Source Networking Technician Certification (OSNTC) · Technician pathway · Lesson 002 Every device on a network can have an IP address, but the IP address alone does not tell the device which addresses belong to its local network. A subnet mask helps make that distinction. This lesson builds directly on OSNTC.001: IP Addresses A Simple…

An array and a vector both let a C++ program keep several values together instead of creating a separate variable for every item. The main beginner difference is simple: an array has a fixed size, while a vector can grow or shrink. Start With Four Scores The four values are stored under one name: scores.…

A member function is a function that belongs to a class. It lets an object perform an action using the data stored inside that object. Start With a Game Score In Lesson 8, we used classes to group related data. Now we can give a class an action. showScore() is a member function because it…

A C++ class is a way to describe a kind of thing in a program. An object is one actual thing created from that class. Think of a class as a character template in a game and an object as one character made from that template. A Simple Gaming Example Player is the class. hero…