By Rob Cameron

The writer did an excellent activity making this regularly dry fabric effortless to understand.

I wager he is sturdy having a look too.

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Com 23 24 Chapter 1 • Networking, Security, and the Firewall forms: logging by the operating system, logging by a network device such as a router or firewall, or logging by an intrusion detection system (IDS) or packet-capture device. ■ Nonrepudiation Ensuring that a person initiating a transaction is authenticated sufficiently such that he or she cannot reasonably deny that they were the initiating party. Public key cryptography is often used to support this effort. The definition of adequately depends, however, on how much risk exists in each area.

When HTTP is used to pass data from server to client, it employs something called HTTP headers. HTTP headers are effectively the language of HTTP. com Networking, Security, and the Firewall • Chapter 1 that was requested. All of this is an example of application layer communications. Other examples of application layer protocols are File Transfer Protocol (FTP), Domain Name Service (DNS),Telnet, and Secure Shell (SSH). Layer 6:The Presentation Layer The presentation layer controls the presentation or formatting of the data content.

685 SNMP . . . . . . . . . . . . . . . . . 685 Traffic Shaping . . . . . . . . . . . . . . 685 DiffServ Code Point Marking . . . . . . . 685 URL Filtering . . . . . . . . . . . . . . 686 Integrated URL Filtering . . . . . . . . . 686 Redirect URL Filtering . . . . . . . . . . 686 VPN’s . . . . . . . . . . . . . . . . . 686 NAT-Traversal . . . . . . . . . . . . . com/solutions). Index . . . . . .

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