HP EliteBook 2740p Tablet-PC - Manual (Page 36)

When you set up a WLAN or access an existing WLAN, always enable security features to protect
your network from unauthorized access. The common security levels are Wi-Fi Protected Access
(WPA) and Wired Equivalent Privacy (WEP). Because wireless radio signals travel outside the
network, other WLAN devices can pick up unprotected signals and either connect to your network
(uninvited) or capture information being sent across it. However, you can take precautions to protect
your WLAN:
● Use a wireless transmitter with built-in security
Many wireless base stations, gateways, and routers provide built-in security features such as
wireless security protocols and firewalls. With the correct wireless transmitter, you can protect
your network from the most common wireless security risks.
● Work behind a firewall
A firewall is a barrier that checks both data and requests for data that are sent to your network
and then discards any suspicious items. Firewalls are available in many varieties, both software
and hardware. Some networks use a combination of both types.
● Use wireless encryption
A variety of sophisticated encryption protocols is available for your WLAN. Find the solution that
works best for your network security:
◦ Wired Equivalent Privacy (WEP) is a wireless security protocol that uses a WEP key to
encode or encrypt all network data before it is transmitted. Usually, you can allow the
network to assign the WEP key. Alternatively, you can set up your own key, generate a
different key, or choose other advanced options. Without the correct key, others will not be
able to use the WLAN.
◦ WPA (Wi-Fi Protected Access), like WEP, uses security settings to encrypt and decrypt
data that is transmitted over the network. However, instead of using one static security key
for encryptions as WEP does, WPA uses temporal key integrity protocol (TKIP) to
dynamically generate a new key for every packet. It also generates different sets of keys for
each computer on the network.
● Close your network
If possible, prevent your network name (SSID) from being broadcast by the wireless transmitter.
Most networks initially broadcast the name, telling any computer nearby that your network is
available. By closing the network, other computers are less likely to know that your network
exists.
NOTE: If your network is closed and the SSID is not broadcast, you will need to know or
remember the SSID to connect new devices to the network. Write down the SSID and store it in
a secure place before closing the network.
24 Chapter 3 Networking