
2 Symbol WS 5100 Wireless Switch Reviewer's Guide
1.3 WLAN Challenges in an Enterprise
Environment
For all the advantages they provide, the use of WLANs in an enterprise
introduces a set of special challenges.
1.3.1 Security
Security is a primary concern because WLAN signals can “leak” through
walls. Hackers have been known to sit in a public area with a laptop and a
wireless card and access highly sensitive information through WLANs that
have little or no security. To prevent security problems like this, much more
robust WLAN security systems have been recently proposed and adopted.
These include 802.11i (also known as WPA2). 802.11i significantly enhances
wireless security through stronger cryptographic algorithms, message
integrity checks, dynamic key management, and strong user authentication.
1.3.2 Integration
IT departments are increasingly looking to integrate WLAN technologies into
their networks. Aspects of WLAN deployment that demand consideration are:
ongoing network management and troubleshooting to optimize operations,
remote deployment in branch offices, and upgrade paths to newer
technologies (radio, security, quality-of-service, etc.).
1.3.3 Complexity and Cost
The perceived complexity and cost in deploying a WLAN network is a key
barrier for many organizations. That’s because the most widely deployed
WLAN systems use expensive devices called Access Points. The Total Cost
of Ownership (TCO) of an Access Point-based WLAN comprises three key
components:
Installation Costs. Installation costs include electrical wiring, the
price of the Access Point itself, changes to the design of the existing
wired LAN, and configuration and management support. Because
each Access Point needs to be managed as a separate network
entity, these costs can be substantial.