Cisco Aironet Wireless LAN Client Adapters Installation and Configuration Guide for MS-DOS

The Cisco Aironet Wireless LAN Client Adapters, also referred to as adapters, are radio modules that provide transparent, wireless, data communications between fixed, portable, or mobile devices and other wireless devices or a wired network infrastructure. The adapters are fully compatible when used in devices supporting Plug-and-Play (PnP) technology. Host devices can be any device equipped with a PC Card Type II or Type III slot. These devices include:

• Desktop systems
• Portable laptops
• Notebook computers
• Personal digital assistants
• Pen based computers
• Other data collection devices


The primary function of the adapters is to transfer data packets transparently through the wireless infrastructure. The adapters operate similarly to a standard network product except that the cable is replaced with a radio connection. No special wireless networking functions are required, and all existing applications that operate over a network can operate using the adapters. The PC Card can also be built into peripheral devices such as printers to provide them with a transparent wireless connection to a wired network.

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Cisco IOS XR Security Guide Book

This introduction contains the following:
• Definition of security and the role of security in the larger context of high network availability
• A preview of the modules in the Cisco IOS XR Security Guide
This guide describes many aspects of the system security that Cisco IOS XR software provides on the Cisco CRS-1 routers and Cisco 12000 Series Router.

Internet attacks occur every day, and these attacks can include core routers as targets—usually with some form of denial of service (DoS) attack.

Fortunately, the Cisco CRS-1 router and Cisco 12000 Series Router come with a highly robust, built-in security structure. These routers can withstand attacks and remain in service until the necessary responses have been completed. This guide describes the software architecture and the hardware support for addressing these attacks. It also provides guidance on how you can further protect your investment in these products. Our security goal for the Cisco CRS-1 router and the Cisco 12000 Series Router is to neutralize attacks and recover quickly from any degradation of service. The point is to keep the router always operating, regardless of even a distributed denial of service (DDoS) attack. We developed the systems that run Cisco IOS XRsoftware so that an attack on one process, service, or plane does not compromise any other process, service, or plane. For example, a process that is shut down automatically restarts, and when needed, a patch can be applied without restarting the router. Essentially, these mechanisms are:
• Modularity of services
• Separation and isolation of management, control, and data (or forwarding) planes
• Multiple layers of increasingly stringent defense
• Convenient upgradability

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