Selecting a WAN Protocol

You should consider the following factors when selecting a WAN type:
 Availability
 Bandwidth
 Cost
 Manageability
 Applications in use
 Quality of service
 Reliability
 Security
Many of these elements are common to any network design regardless of its WAN or LAN
delineation. This section defines each of these factors and provides some guidance as to how
they might apply to remote access deployments.