Chapter 6.8, Problem 6.7ARQ

Explanation of Solution

VPN and its purpose:

A private internet access provides Virtual Private Network (VPN) service.

• It is an extension of private network which includes links over shared or public network.
• It helps an organization by providing secure methodology for encoding private network traffic.

Working principle of VPN:

The representation of working procedure of VPN is shown below:

• The above figure will illustrate how VPN connects to a remote computer. Here VPN client is the remote user.
• By accessing local Internet Service Provider, the client can makes a public connection to the Internet.
• In other case, the client’s software on user’s computer will makes a connection with the VPN server.
• Therefore, both VPN client and VPN server can have a safe connection and it is referred as “tunnel”.
• A tunnel is a virtual, pathway over shared or public network from the VPN client and VPN server.

Virtual and it relates to VPN:

• The term “virtual” means a thing which appears to exist but really does not.
• VPN makes the presence of private connection on protected network using public internet.

Private cloud:

• A private cloud is a specific model of cloud computing which includes a separate and secure cloud based infrastructure in which only the specified customer can activate.
• A cloud which is owned and activated by an organization for their own profit is referred as “private cloud”.

Benefits of private cloud are questionable:

• A private cloud provides the benefit of elasticity resource but to questionable profit. Because what else a company can do with their idle servers.
• Unlike cloud dealers, an organization cannot repurpose the idle servers for the usage of other organizations.
• Hence they realize to save some cost by shut down those servers...