Which two of these are scalability benefits of designing a network that utilizes VPNs?
(Choose two.)
A.
reduces dial infrastructure expenditures
B.
reduces the number of physical connections
C.
allows networks to be set up and restructured quickly
D.
simplifies the underlying structure of a customer WAN
E.
extends the network to remote users
Explanation:
Page 337 in Cisco Authorized Self-Study Guide (DESGN) 640-863
The benefits of using VPNs include the following:
* Flexibility: VPNs offer flexibility because site-to-site and remote-access connections can be set up quickly and over existing infrastructure to extend the network to remote users. Extranet connectivity for business partners is also a possibility. A variety of security policies can be provisioned in a VPN, thereby enabling flexible interconnection of different security domains.
* Scalability: VPNs allow organization to leverage and extend the classic WAN to more remote and external users. VPNs offer scalability over large areas because IP transport is universally available. This arrangement reduces the number of physical connections and simplifies the underlying structure of a customer’s WAN.
* Lower network communication cost: Lower cost is a primary reason for migrating from traditional connectivity options to a VPN connection. Reduced dial-up and dedicated bandwidth infrastructure and service provider costs make VPNs attractive. Customers can reuse existing links and take advantage of the statistical packet multiplexing features.