# Implementation Flexibility

- ## Heterogeneous WANs

  - Layer 3 masks physical and link layer diversity
  - Eases support for geographically heterogeneous WAN environments (e.g. X.25 in Asia to PPP in U.S.)

- ## Carrier independence

  - CPE-based solutions allow secure traversal of multiple carrier networks
  - Allows choice of best cost provider in each location

- ## Competitive business performance

  - More efficient interaction with customers, partners and suppliers
  - Lower costs, faster communications

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