PPP

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PPP

Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

Purchasing Power Parity

The theory stating that, in an efficient market, the exchange rate of two currencies results in equal purchasing power. That is, if one pound is worth two dollars, one pound in England should buy the same amount in goods and services that two dollars can buy in the United States. Fixed exchange rates, taxes, and other inefficiencies are thought to disrupt purchasing power parity. Some theorists believe the idea holds most true when comparing countries or regions with similar standards of living.
Farlex Financial Dictionary. © 2012 Farlex, Inc. All Rights Reserved
References in periodicals archive ?
Cabletron also announced significant VPN enhancements to its current line of SSR 100, 200 and 500 SOHO and branch office routers to support secure VPN tunneling based on IPSec and L2TP. Cabletron is unique in the industry in that its products can deliver VPN solutions over all major "last mile" access technologies, including cable, xDSL, PPP, Frame Relay, ISDN and wireless connections.
SSR 100/200 VPN software: IPSec & L2TP with DES $195 Sep.
However, vendors have combined PPTP with a similar protocol, Cisco Systems' Layer 2 forwarding protocol, to create L2TP, which supports multiple, simultaneous tunnels for a single client.
The Interworking Function within its Total Control access platform now supports the L2TP and PPTP tunneling protocols, extending the reach of wired VPNs to mobile workers.
The leading tunneling protocols are: SOCKSv5, Point-to-Point Tunneling Protocol (PPTP), Layer 2 Transport Protocol (L2TP), and Internet Protocol Security (IPSec).
However, vendors have combined PPTP with a similar protocol, Cisco Systems' Layer 2 Forwarding Protocol, to create L2TP, which they hope to present to the IETF for consideration as a standard.
The Internet Engineering Task Force has approved a method called L2TP, which combines Microsoft's Point to Point Tunneling Protocol with Cisco's Layer 2 Forwarding tunneling scheme.