Difference Between Size vs Size on Disk

Size vs Size on Disk

A lot of people have been confused when looking at the properties of a file, folder, or drive as the properties size and size on disk do not usually match each other. The value of size in the properties page indicates the actual size of the file while the size on disk indicates the number of bytes that it actually occupies on the hard drive
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Cisco IPSec VPN Design (Networking Technology)

IPSec VPN Design (Networking Technology)
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Publisher: Cisco Press | ISBN: 1587051117 | edition 2005 | CHM | 384 pages | 8,87 mb
The definitive design and deployment guide for secure virtual private networks
* Learn about IPSec protocols and Cisco IOS IPSec packet processing
* Understand the differences between IPSec tunnel mode and transport mode
* Evaluate the IPSec features that improve VPN scalability and fault tolerance, such as dead peer detection and control plane keepalives
* Overcome the challenges of working with NAT and PMTUD
* Explore IPSec remote-access features, including extended authentication, mode-configuration, and digital certificates
* Examine the pros and cons of various IPSec connection models such as native IPSec, GRE, and remote access
* Apply fault tolerance methods to IPSec VPN designs
* Employ mechanisms to alleviate the configuration complexity of a large- scale IPSec VPN, including Tunnel End-Point Discovery (TED) and Dynamic Multipoint VPNs (DMVPN)
* Add services to IPSec VPNs, including voice and multicast
* Understand how network-based VPNs operate and how to integrate IPSec VPNs with MPLS VPNs.