802.11b is widely adopted. It operates in the 2.4 GHz frequency band (can conflict with other users of the 2.4 GHz frequency band such as Bluetooth, microwaves, cordless phones; the conflict with Bluetooth is being resolved).
Supports bandwidths of up to a maximum of 11 MB with a range of about 150+ feet (bandwidth decreases with the range).
IEEE 802.1X is an IEEE-certified data link layer protocol that enables a machine and the network to authenticate each other and generate a per session/user key for encrypting data on the wireless link.
Within the 802.1X implementation, this implementation supports the Extended Authentication Protocol for encapsulating Transport Layer Security (EAP-TLS) as an authentication protocol. In EAP-TLS, the wireless client and a back-end authentication (RADIUS) server conduct a TLS handshake that enables certificate-based mutual authentication and subsequent key generation for the encryption of all data packets.
Authentication can be handled using the RADIUS protocol for easy integration into most networks
Enhances security by blocking any networking activity until a successful user authentication is performed
Wired Equivalent Protocol encryption keys are managed and rotated on a per session basis
Support provided by independent hardware vendors (IHV) bundled with hardware:
Toshiba (e740 PPC)
The IHVs will bundle Microsoft infrastructure code with their driver and settings user interface (including certificate enrollment tools). The IHVs will distribute and support the 802.1x software.
Microsoft plans to provide support for the Protected EAP (PEAP) authentication scheme defined within the 802.1X implementation, but this support will not be provided in this Pocket PC 2002 release.
Note: There is a registry key that can be used to disable server validation. However, server validation cannot be disabled for PEAP because the user’s ID and password are transmitted during the PEAP authentication.
Our EAP (Extended Authentication Protocol)-TLS (Transport Layer Security) support includes verification of both the client and the server. The user enrolls for a Client Authentication certificate using the enrollment tool on the device. The enrollment tools are installed with the IHV drivers for the network card.
Certificate enrollment will require a PC connection through ActiveSync ® with desktop pass-through enabled to connect to the network.
You will also need to retrieve a root certificate, which is used for server authentication. At the time of authentication, the client requests the certificate of the authorization server. If that certificate does not chain to a trusted root certificate on the device then the client will assume the server is being spoofed and will terminate the connection.
Note: There is an option (registry key) to disable server validation for TLS.
GSM is an open, standards-based system that is constantly evolving.
The General Packet Radio Service (GPRS) is a new non-voice data service that permits information to be sent and received across a mobile telephone network. Theoretical maximum speeds of up to 171.2 Kilobits per second (Kbps) are achievable with GPRS using all eight timeslots at the same time.
Click Next, and clear “Wait for dial tone before dialing.”
Your Pocket PC is now ready to connect to GPRS.
Note: If your mobile phone does not support the ETSI dial string, *99***APN number# (the Motorola Timeport 260 does not, for example), just enter *99# as the phone number, and then click Next (see figure).
Currently, there is only one commercial system that uses CDMA, covered by the specifications IS-95 and J-STD-008. The term CDMA is often used to refer to that system. CDMA was designed by QUALCOMM in the United States.
IS-95 is a standard that describes a cell system that uses a CDMA link and operates at 800 MHz. Sometimes the term is also used to describe 1900 MHz CDMA, which is covered by J-STD-008. This explains why most CDMA phones operate on 800- to 1900-MHz frequencies.
History note: CDMA technology was first used by the military in WWII against jamming.
Enhancing CDMA cellular technology data capabilities is the 1xrtt CDMA standard. This first phase of CDMA2000, called 1xrtt, is designed to double current voice capacity and support always-on data transmission speeds ten times faster than is typically available today (some are 144 Kbps).
Pocket PC VPN client does not support IPSec or L2TP VPNs (resolution). Use a third-party client for IPSec or L2TP VPN connectivity.
Movian is a company that has a VPN client for IPSec that runs on the Pocket PC. For more information, visit: http:// www.movianvpn.com/products/products_vpn.html
The third-party products discussed in this message are manufactured by vendors independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding these products' performance or reliability.
Bluetooth Bluetooth is a low power radio technology being developed with the objective of replacing the wires currently used to connect electronic devices, such as personal computers, printers, and a wide variety of handheld devices, such as palm top computers and mobile phones. The development of Bluetooth began in early 1998 and was led by a number of telecommunications and computer industry leaders. The Bluetooth specification will be open and royalty-free, and available to anyone who wishes to use it in their products. Bluetooth operates in the 2.4GHz ISM (industrial, scientific, medical) band, and devices equipped with Bluetooth should be capable of exchanging data at speeds up to 720 Kbps at ranges up to 10 meters. This is achieved using a transmission power of 1mW and the incorporation of frequency hopping to avoid interference. If the receiving device detects that the transmitting device is closer than 10 meters, it will automatically modify its transmitting power to suit the range. The device should also shift to a low-power mode as soon as traffic volume becomes low or ceases altogether.
GPRS - GSM Packet Radio Service GPRS, which has been standardized by ETSI (European Telecommunications Standards Institute) as part of the GSM Phase 2+ development, represents the first implementation of packet switching within GSM, which is essentially a circuit switched technology. Instead of sending a continuous stream of data over a permanent connection, packet switching only uses the network when there is data to be sent. Using GPRS will permit users to send and receive data at speeds of up to 115 Kbps. The implementation of GPRS will bring tremendous benefits to GSM network operators. It brings Internet Protocol (IP) capability to the GSM network for the first time and enables connection to a wide range of public and private data networks using industry standard data protocols, such as TCP/IP. GPRS is extremely efficient in its use of scarce spectrum resources and permits GSM operators to introduce a wide range of value-added services for market differentiation. GPRS is ideal for ‘bursty’ type data applications, such as e-mail or Internet access, and can also enable ‘virtual permanent connection’ to data sources, allowing information to arrive rather than being sought. This cannot be achieved using standard circuit-switched networks.
WAP - Wireless Application Protocol The development of WAP is being driven by the WAP Forum, initially founded by Motorola, Nokia, Ericsson and Unwired Planet. Since its inception the WAP Forum has grown dramatically and now comprises of over 80 members drawn from the world’s leading telecommunications and software companies. WAP is a technology designed to provide users of mobile terminals with rapid and efficient access to the Internet. WAP is a protocol optimized, not only for use on the narrow band radio channels used by second generation digital wireless systems, but also for the limited display capabilities and functionality of the display systems used by today’s mobile terminals. WAP integrates telephony services with micro browsing and enables easy-to-use interactive Internet access from the mobile handset. Typical WAP applications include over-the-air e-commerce transactions, online banking, information provisioning and messaging. Further information: http://www.wapforum.org/ .