When reviewing an implementation of a VoIP system over a corporate WAN, an IS auditor should expect to
find:

A.
an integrated services digital network (ISDN) data link.

B.
traffic engineering.

C.
wired equivalent privacy (WEP) encryption of data.

D.
analog phone terminals.

Explanation:
To ensure that quality of service requirements are achieved, the Voice-over IP (VoIP) service over the wide
area network (WAN) should be protected from packet losses, latency or jitter. To reach this objective, the
network performance can be managed using statistical techniques such as traffic engineering. The standard
bandwidth of an integrated services digital network (ISDN) data link would not provide the quality of services
required for corporate VoIP services. WEP is an encryption scheme related to wireless networking. The VoIP
phones are usually connected to a corporate local area network (LAN) and are not analog.