The BEST way to minimize the risk of communication failures in an e-commerce environment
would be to use:

A.
compression software to minimize transmission duration.

B.
functional or message acknowledgments.

C.
a packet-filtering firewall to reroute messages.

D.
leased asynchronous transfer mode lines.

Explanation:

Leased asynchronous transfer mode lines are a way to avoid using public and shared
infrastructures from the carrier or Internet service provider that have a greater number of
communication failures. Choice A, compression software, is a valid way to reduce the problem, but
is not as good as leased asynchronous transfer mode lines. Choice B is a control based on higher
protocol layers and helps if communication lines are introducing noise, but not if a link is down.
Choice C, a packet-filtering firewall, does not reroute messages.