11-01-2014, 10:58 AM
Virtual Private Network
Virtual Private .ppt (Size: 244.5 KB / Downloads: 83)
What is a VPN?
A virtual network overlaid on top of the ubiquitous interconnection of the Internet
and a private network for confidential communications and exclusive usage.
VPNs
In a virtual private network (VPN), "virtual" implies that there is no physical network infrastructure dedicated to the private network.
Instead, a single physical network infrastructure is shared among various logical networks
In VPNs, various networking technologies are applied toward the goal of providing private communications within the public Internet infrastructure
The VPN MarketPlace
VPN Products: Hardware and Software that make VPNs possible
A VPN gateway is a stand-alone device that enables authorized access to the protected network resources. The resources are not located on the same physical device with the VPN gateway
A VPN client, on the other hand, is installed on the same network device it is supposed to protect. Usually, the client is a software package installed on the host computer.
VPN Barriers
Lack of interoperability of IPSec* implementations.
Lack of widely used quality of service (QoS) standards, as well as the sparse deployment of QoS-capable infrastructures
Security services in support of VPNs must be constructed from additional hardware and software components as Internet infrastructure is still largely focused on providing connectivity and does not yet offer services beyond connectivity.
Virtual Private .ppt (Size: 244.5 KB / Downloads: 83)
What is a VPN?
A virtual network overlaid on top of the ubiquitous interconnection of the Internet
and a private network for confidential communications and exclusive usage.
VPNs
In a virtual private network (VPN), "virtual" implies that there is no physical network infrastructure dedicated to the private network.
Instead, a single physical network infrastructure is shared among various logical networks
In VPNs, various networking technologies are applied toward the goal of providing private communications within the public Internet infrastructure
The VPN MarketPlace
VPN Products: Hardware and Software that make VPNs possible
A VPN gateway is a stand-alone device that enables authorized access to the protected network resources. The resources are not located on the same physical device with the VPN gateway
A VPN client, on the other hand, is installed on the same network device it is supposed to protect. Usually, the client is a software package installed on the host computer.
VPN Barriers
Lack of interoperability of IPSec* implementations.
Lack of widely used quality of service (QoS) standards, as well as the sparse deployment of QoS-capable infrastructures
Security services in support of VPNs must be constructed from additional hardware and software components as Internet infrastructure is still largely focused on providing connectivity and does not yet offer services beyond connectivity.