By Todd Lammle

Concise, available insurance of All CCNA goals for examination 640-801 Bonus checks at the CD Written by means of Todd Lammle, the prime Authority on Cisco Internetworking From the writer of Sybex's best-selling CCNA: Cisco qualified community affiliate examine advisor comes the streamlined device you must hone in on severe CCNA info: CCNA quick go. The enclosed CD allows you to perform, perform, perform so that you can procedure the examination with self belief. assurance contains: Designing Cisco internetworks constructing an entry record comparing TCP/IP conversation Configuring routers and switches Configuring IP addresses, subnet mask, and gateway addresses appearing LAN, VLAN, and WAN troubleshooting knowing principles for packet keep an eye on Featured at the CD The enclosed CD gains CCNA perform assessments overlaying all examination ambitions. you furthermore mght get a hundred digital flashcards for computers, Pocket desktops, and Palm handhelds, plus a thesaurus of keyword phrases. observe: CD-ROM/DVD and different supplementary fabrics usually are not incorporated as a part of book dossier.

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Extra resources for CCNA: Cisco Certified Network Associate FastPass, 2nd Edition

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In a Class C network address, the first three bit positions are always the binary 110. So, here is the calculation you would use to figure out the number of possible Class C networks: 3 bytes, or 24 bits, minus 3 reserved positions, leaves 21 positions. Hence, there are 221, or 2,097,152, possible Class C networks. Each unique Class C network has one byte to use for node addresses. This leads to 28, or 256, minus the 2 reserved patterns of all 0s and all 1s, for a total of 254 node addresses for each Class C network.

This is helpful in larger networks and solves the problem of 15 hops being the maximum possible in a RIP network. IGRP also uses a different metric from RIP. IGRP uses bandwidth and delay of the line by default as a metric for determining the best route to an internetwork. This is called a composite metric. Reliability, load, and maximum transmission unit (MTU) can also be used, although not by default. Here is a list of the differences between IGRP and RIP: IGRP can be used in large internetworks.

EIGRP supports different Network layer protocols through the use of protocol-dependent modules (PDMs). Each EIGRP PDM maintains a separate series of tables containing the routing information that applies to a specific protocol. What this means to you is there will be IP/EIGRP tables, IPX/EIGRP tables, and AppleTalk/EIGRP tables. Neighbor Discovery Before EIGRP routers are willing to exchange routes with each other, they must become neighbors. There are three conditions that must be met for neighborship establishment: Hello or ACK (acknowledgment) received AS numbers match Identical metrics (K values) Link-state protocols tend to use Hello messages to establish neighbors because they normally do not send out periodic route updates, and some sort of mechanism has to help neighbors realize when a new peer has moved in or when an old one has left or gone down.

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