Tunneling is defined as the organization of data into secured frames or packets, defined by a secured preamble or transit network frame and transit internetwork header (Cisco, 2010). ING needs to take these steps into account in determining if the extranet will actually be as effective as they hope it will; VPN networks running SSL connections can be bandwidth intensive if there are high percentage of transaction traffic on them (Cisco, 2010). ING would be best advised to complete several pilots of the extranet, varying options in the VPN configuration parameters and the SSL options to ensure optimal performance while also gaining the greatest level of speed as well. Figure 1, How VPN Tunnels Work, illustrates this concept of how Transit Internetwork Headers are critical for securing a VPN tunnel that will send data, and in the case of ING, policy requests, from brokerage partners to the mainframe in CT and back. ING needs to also interpolate the effects of running TN3270 emulation sessions over a VPN configured for SSL security. These are all burdens on the network that will impact its performance and become amplified in the broader, global Internet's performance is slowed down and not working at optimal speeds.
Figure 1: How VPN Tunnels Work
Source: (Cisco Tutorial, 2010)
Extranet Topology Critique
The extranet gives ING an increase in speed, yet additional testing is needed to see the extent to which SSL-based connections over VPN running TN3270 emulations will impact overall performance. The extranet and the download of the browser plug-in is still an interim solution to a much more fundamental problem, which is the performance...
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Ing Organizational Structure: The structure of the organization plays a key role and ING's organization has sustained it and helped in its expansion this far. Basically then it can be assumed that the current structure is functional with some problems. The views regarding the typical system can be explored first so that the INGs system can be placed better. In the basic framework it seems to be working, and it is
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