Protecting Your Wlan; Roaming To Another Network; Using Hp Mobile Broadband (Select Models Only) - HP ProBook 4525s - Notebook PC Reference Manual

For help in setting up your WLAN, refer to the information provided by your router manufacturer or your
ISP.

Protecting your WLAN

When you set up a WLAN or access an existing WLAN, always enable security features to protect your
network from unauthorized access. WLANs in public areas (hotspots) like coffee shops and airports
may not provide any security. If you are concerned about the security of your computer in a hotspot,
limit your network activities to e-mail that is not confidential and basic Internet surfing.
Wireless radio signals travel outside the network, so other WLAN devices can pick up unprotected
signals. You can take the following precautions to protect your WLAN:
●
Firewall—A firewall checks both data and requests for data that are sent to your network, and
discards any suspicious items. Firewalls are available in both software and hardware. Some
networks use a combination of both types.
●
Wireless encryption—Wi-Fi Protected Access (WPA) uses security settings to encrypt and
decrypt data transmitted over the network. 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.

Roaming to another network

When you move your computer within range of another WLAN, Windows attempts to connect to that
network. If the attempt is successful, your computer is automatically connected to the new network. If
Windows does not recognize the new network, follow the same procedure you used initially to connect
to your WLAN.

Using HP Mobile Broadband (select models only)

HP Mobile Broadband enables your computer to use wireless wide area networks (WWANs) to access
the Internet from more places and over larger areas than it can by using WLANs. Using HP Mobile
Broadband requires a network service provider, which in most cases is a mobile phone network provider.
When used with mobile network provider service, HP Mobile Broadband gives you the freedom to stay
connected to the Internet, send e-mail, or connect to your corporate network whether you are on the
road or outside the range of Wi-Fi hotspots.
NOTE: You may need the HP Mobile Broadband Module serial number to activate mobile broadband
service. Refer to the Getting Started guide for the location of the serial number.
Some mobile network service providers require the use of a subscriber identity module (SIM). A SIM
contains basic information about you or your computer, such as a personal identification number (PIN),
as well as network information. Some computers include a preinstalled SIM. If the SIM is not preinstalled,
it may be included with the HP Mobile Broadband information provided with your computer, or it may
be provided separately by the mobile network service provider.
For information on inserting and removing the SIM, refer to
a SIM on page
For information on HP Mobile Broadband and how to activate service with a preferred mobile network
service provider, refer to the HP Mobile Broadband information included with your computer. For
additional information, see the HP Web site at
8 Chapter 2 Networking (select models only)
9.
Inserting a SIM on page 9
http://www.hp.com/go/mobilebroadband
and Removing
(U.S. only).