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 managedusing 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.