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The line: virtual double function \( X() \) const \( =0 \); in a class definition indicates that the class is probably a: Base class. Library class. Protected class. Derived class.

Ask by Phillips Morgan. in the United States
Mar 14,2025

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The class is probably a **Base class**.

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The Deep Dive

This line indicates that the class is a base class, specifically an abstract base class. When a class contains at least one pure virtual function (like the one you've shown with \( =0 \)), it cannot be instantiated directly. Instead, it's intended to be a blueprint for derived classes that must implement the pure virtual function to provide specific functionality. It's like an artist providing a canvas where different painters can create their unique masterpieces! In practical terms, using abstract base classes encourages a design that relies on polymorphism, enhancing the flexibility and scalability of your code. For instance, if you have a base class `Shape`, derived classes like `Circle`, `Square`, or `Triangle` can implement the `X` function to calculate their respective areas. This allows your program to handle various shapes uniformly, making it robust and versatile in real-world applications!

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To answer this question, complete the lab using the information below. You have been asked to add a VPN connection on a laptop computer in your organization. The sales team uses this computer to deliver sales presentations. They need to establish a secure connection to the company network while working on the road. You need to choose a VPN type that operates using firewall ports that are commonly left open. You also need to use the most secure password-based authentication possible without using a smart card. In this lab, your task is to configure and establish a VPN connection on the Office2-Lap using the following information: - Add a VPN Connection as follows: - VPN provider: Windows (built-in) - Connection name: SalesVPN - Server name or address: 198.10.20.12 - VPN type: Secure Socket Tunneling Protocol (SSTP) (SSTP works by encapsulating PPP traffic over the SSL channel of the HTTPS protocol. This type of VPN runs on port 443, which is typically left open-in most network firewalls.) - Type of sign-in info: User name and password - Don't allow Windows to remember authentication credentials - Set VPN security properties to meet the following requirements: - VPN type: Secure Socket Tunneling Protocol (SSTP) - Authentication: Microsoft: Secured password (EAP-MSCHAP V2) (encryption enabled) (This is the most secure password-based authentication protocol.) - Connect to the VPN as follows: - Username: MaryS49 - Password: Sm@rt72\# (i) It isn't necessary to specify a domain when configurring this connection.
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