By Todd Lammle, Wade Edwards, Tom Lancaster, Justin Menga, Eric Quinn, Jason Rohm, Carl Timm, Bryant Tow
To make sure sufficient aid for his or her defense services, Cisco published a professional-level certification, Cisco qualified defense expert (CCSP). This unmarried quantity, from the chief in certification, offers whole and up to date assurance of all 5 tests required for the CCSP certification: 640-501, 640-511, 640-521, 640-531, 640-541. not just is it convenient to have the entire beneficial research details compiled in a single advisor, it's also the main least expensive self-study resolution. The better half CD contains complicated checking out engine containing bankruptcy assessment questions and ten bonus checks, flashcards for computers, Pocket desktops, and Palm units, and the complete ebook in PDF.
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Extra info for CCSP Complete Study Guide (642-501, 642-511, 642-521, 642-531, 642-541) Part 2
Remember that the xlate table shows the current translations and connections. Packet Processing Now that you know how NAT works, let’s look at how the PIX Firewall processes packets. We’ll see how it handles outbound packets, inbound packets, and routing. Outbound Packets When a packet arrives on the inside interface, the PIX Firewall first checks the xlate table for a translation slot. Specifically, this means the PIX Firewall checks the source address of the IP header and searches the xlate table for a match.
Since you can have multiple NTP servers configured, you can set one to be preferred over the others with the prefer option. You can use some commands to configure NTP authentication to make sure you’re getting time from a trusted source. The ntp authenticate command globally enables NTP authentication for the PIX Firewall. To configure a Message Digest 5 (MD5) authentication key, you use the ntp authencicationkey number MD5 value command. The number is a number from 1 to 4,294,967,295, and the value is the key value, which is an arbitrary string of up to 32 characters.
236 Chapter 10 PIX Firewall Basics Some models of the PIX Firewall have more than one internal bus, which shuttles data from the interfaces to the CPU and RAM. For instance, the PIX 535 has three separate buses: two run at 66MHz or 33MHz, and the third runs at only 33MHz. Some interface cards, such as the Gigabit Ethernet interface card, come in 33MHz and 66MHz flavors, so the interface you use and the slot you choose can greatly affect your system’s performance. Other interface cards, such as the VPN accelerator and four-port Fast Ethernet cards, can be placed only in 33Mhz slots, or the system will hang at boot time.
CCSP Complete Study Guide (642-501, 642-511, 642-521, 642-531, 642-541) Part 2 by Todd Lammle, Wade Edwards, Tom Lancaster, Justin Menga, Eric Quinn, Jason Rohm, Carl Timm, Bryant Tow