Industrial Communication Systems

28-6 Industrial Communication Systems

is the link layer security protocol based on AES that provides support for encryption and data integrity.

WLAN Authentication and Privacy Infrastructure (WAPI) is a Chinese standard for wireless LAN.

28.2.3 Deployment Issues

Some issues/guidelines for deploying WLANs include

1.

To

minimize

the

chance

of

wireless

eavesdropping,

avoid

having

the

WLAN

signal

extend

beyond

the

boundaries

of

the

desired

range

of

the

network.

e

signal

strength

can

be

minimized

by

turning

down

the

power

on

the

AP

and

using

only

the

minimum

antenna

gain

necessary.

Use

sectored

or

panel

antennas

instead

of

omnidirectional

antenna ...