Virtual Private Network (VPN) Technology And Its Applications

What is VPN Technology?

Question:

Discuss about the Advantages and challenges of adopting cloud compute.

A Virtual Private Network (VPN) is a form of technology that is able to create a secure and encrypted connection over a network that is expected to be less secure. This technology is meant to add a layer of privacy and security to public and private networks. VPN technology is constructed using public wires in order to connect to regional offices or distant users to the private and internal network of a company (Jain & Paul, 2013).

The privacy issues are increased with the help of a VPN as because the initials of the user’s IP address is substituted with one from the provider of the VPN. This method allows a user to achieve an IP address from any gateway. For example, with the help of VPN, a person who is living in San Francisco may appear to reside in Amsterdam or any other gateway city. A VPN protocol makes use of a set of instructions that are used to convey a secure encrypted connection between computers. Such type of protocols is mainly supported by the use of commercial VPN services. The most important of these protocols are PPTP, OpenVPN, SSTP, L2TP/IPSec and IKEv2 (Modi et al., 2013).

The VPN makes use of encryption technology in order to provide confidentiality of data. Once the system is connected to the internet, the VPN technology makes use of the mechanism of tunneling. The mechanism of tunneling can be used to compress the encrypted information and data into a protected tunnel that has open read headers, which can cross a public network. The information packets that are delivered over a public network cannot be read without proper keys of decryption (Chung et al., 2013). This can ensure that the important data is not changed or revealed during the transmission of data.

As internet connections have become faster, reliable and widely available, the use of VPNs has continuously expanded. Many large companies have shifted their remote office connections from the high-cost connections of leased lines to internet-based VPN connections. A VPN connection can be generated by a point-to-point connection with the use of a dedicated connection or encryption of the traffic. They can also offer the advantages of a wide area network (WAN). The recent trend of VPN connections would continue as the speed of internet connections would continue to expand with the passage of time (Fortuna et al., 2015).

Virtual Private Networking (VPN) is an application of software that permits the user to communicate between computers that can work on a public network. The technique of Virtual Network Computing (VNC) is another application, but it is used for another purpose. The main purpose of VNC is to have a control over the desktop of a computer with the help of another computer having a network connection.

Although the VPN is usually referred to a secure method of the transmission of a network, the VNC is merely related to the administration of a network. VPN allows a user to connect with a public network in a secured manner by using the same switch but VNC allows the control of a desktop from any other computer (Sathiaseelan et al., 2014).

How VPN Technology Works?

Though VPNs are much more complicated during the setup process than VNC connections, yet they allow the users to use local applications on a remote network. The task of VPNs is to enable VNC connections to desktop computers with the help of remote networks. It thus makes sure that the servers are not kept bare to the public internet. This helps in improving the security with the help of VPN and the use of a local client of VNC in order to access desktops (Sharkh et al., 2013). VPN can allow a user to transfer files from a remote folder to a local folder, print the documents on a remote server to a local printer, but a VNC can allow accessing a primary remote computer.

In the recent times, the major issue of concern is privacy. The VPN is an efficient way in order to maintain anonymity and privacy. The VPNs is able to encrypt the traffic between the personal computer of a user and the entry point of a VPN. They can also be helpful when a user would be avoiding online censorship or they are using an IP address, which is indirectly associated. VNC could be a great factor for individual persons and businesses who would be willing to access a remote computer but a VPN is good for those people who wish to encrypt and secure their vital files and data (Selvi, Sankar & Umarani, 2014).

The company can make use of the Remote Access Technology in order to gain accessibility to a network or computer from a longer distance. In the corporate sector, persons who are working at offices, home-workers and people who travel might need to gain access to the office network. Internet Service Provider (ISP) can help users to get an access to the internet with the help of the remote access technology (Maiti, Maxwell & Kist, 2014). The most common method of remote access is through a dial-up connection with the help of a notebook, desktop or even with the help of a handheld modem over telephone lines.

The remote access technology can permit files to be read and written to the target without the capability of remote computer. This technology provides a remote login to the system. It also helps in the accessibility of the files across WANs. A VPN involves the software of the client to be present on the system of the host and the VPN server that are installed on the target network (Kist et al., 2014).

The technology is makes use of a dedicated line between a local network and the computer. The Integrated Services Digital Network (ISDN) is the most commonly used method of the remote access technology. This can combine dial-up connection with faster rates of data. Other technologies that offer different possibilities for remote access are cable, wireless, Digital Subscriber Line (DSL) and modem

There are two major components that are essential for a VPN having a remote access technology. The first component is the Network Access Server (NAS). It is also known as a media gateway or Remote Access Server (RAS). A NAS might be a dedicated server. It may also be one of the many software applications that can run on a shared server. In order to use a VPN, a user has to connect to the NAS with the help of internet. In the NAS system, the user requires to provide their valid credentials as to sign in to their systems. The NAS system has their own process of authentication or a separate server for authentication that can run on a network as to authenticate the credentials of the user (Gu et al., 2013).

Advantages of VPN Technology

Another essential component of remotely accessible VPNs is a client software. In this type of component, if an employee desires to use the VPN from their computer system, they would require a particular software on those computer that would establish and maintain a connection with the VPN. Nowadays some modern operating systems possess an inbuilt system software that is capable of connecting to remote accessible VPNs although some of the VPNs might require users to install a precise form of application. The software of the client is set up with the help of a tunneled connection to a NAS. The user is indicated of this activity with the help of the internet address. The client software is also responsible for managing the required encryption in order to maintain a secure connection.

Many big businesses and large corporations that possess high knowledgeable IT staff are often used to buying, deploy and maintain their own remote accessible VPNs. Many businesses could easily opt to outsource their remotely accessed VPN services with the help of an Enterprise Service Provider (ESP). The ESP can easily set up a NAS for a business and thus try to maintain in keeping the NAS to run smoothly (Avram, 2014). 

A remote access technology is the type of system and the software, which is associated with it. It is often set up to handle those users who are seeking to gain access to a remote network. It is sometimes referred as a server for communication. This kind of server is often linked with a firewall server in order to safeguard the level of security. It is also able to forward the remotely accessible request to another part of the corporate sector. The remote access technology can contain the work with a modem pool manager such that a small group of modems could be shared with a larger group of irregularly present users of remote access server technology.

References

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