This book looks at network security in a new and refreshing way. It guides readers step-by-step through the "stack" -- the seven layers of a network. Each chapter focuses on one layer of the stack along with the attacks, vulnerabilities, and exploits that can be found at that layer. The book even includes a chapter on the mythical eighth layer: The people layer.

Boundary layer meteorology is the study of the physical processes that take place in the layer of air that is most influenced by the earth's underlying surface. This text/reference gives an uncomplicated view of the structure of the boundary layer, the instruments available for measuring its mean and turbulent properties, how best to make the measurements, and ways to process and analyze the data.

In Photoshop CS4: Layer Masks in Depth, senior trainer and photographer Jan Kabili takes an in-depth look at using layer masks to create professional-looking image composites and make targeted photo corrections. Jan examines some common situations in which layer masks are the key to creating convincing image composites. She demonstrates practical ways to enhance photos with layer masking, including masking adjustment layers and Smart Filters to affect part of a photo. She explains how to use layer masks to combine different exposures of the same scene, and teaches how to work with vector masks to achieve a clean, graphic look. Exercise files accompany the course.

In Photoshop CS4: Layer Masks in Depth, senior trainer and photographer Jan Kabili takes an in-depth look at using layer masks to create professional-looking image composites and make targeted photo corrections. Jan examines some common situations in which layer masks are the key to creating convincing image composites. She demonstrates practical ways to enhance photos with layer masking, including masking adjustment layers and Smart Filters to affect part of a photo.

This session focuses on the network security issues surrounding Layer 2, the data link layer. Because many network attacks originate inside the corporate firewall, exploring this soft underbelly of data networking is critical for any secure network design. Issues covered include Address Resolution Protocol (ARP) spoofing, MAC flooding, VLAN hopping, Dynamic Host Configuration Protocol (DHCP) attacks, and Spanning Tree Protocol concerns.