Download PDF by Scott Empson: CCNA Portable Command Guide

By Scott Empson

ISBN-10: 1587201933

ISBN-13: 9781587201936

Getting ready for the CCNAR examination? listed here are the entire CCNA-level instructions you wish in a single condensed, moveable source. The CCNA transportable Command advisor, moment version, is stuffed with worthy, easy-to-access details and is transportable adequate to be used no matter if you are within the server room or the gear closet. This ebook has been thoroughly up to date to hide themes within the ICND1 640-822, ICND2 640-816, and CCNA 640-802 assessments. Use this fast reference source that can assist you memorize instructions and ideas as you're employed to go the CCNA examination. The advisor summarizes all CCNA certification-level Cisco IOSR software program instructions, key terms, command arguments, and linked activates, giving you advice and examples of ways to use the instructions to real-world eventualities. Configuration examples in the course of the e-book offer you a greater realizing of the way those instructions are utilized in uncomplicated community designs.

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You have two of the original subnets left to work with. 0/26 network: 00000000 But you need only 2 H bits, not 6. Therefore, you are left with 00NNNN00 where 00 represents the original pattern of subnetting. NNNN represents the extra bits you have. 00 represents the 2 H bits you need for the serial links. 16/30 . . 60/30 You need only four of them. 16/30 . . 192/26 Future growth Looking at the plan, you can see that no number is used twice. You have now created an IP plan for the network and have made the plan as efficient as possible, wasting no addresses in the serial links and leaving room for future growth.

Now all you need to do is determine the network numbers for the serial links between the routers. Step 5 Determine Network Numbers for Serial Links All serial links between routers have the same property in that they only need two addresses in a network—one for each router interface. Determine the number of H bits needed for these networks: 2H – 2 ≥ 2 H=2 You need 2 H bits to satisfy the requirements of Networks E, F, G, and H. You have two of the original subnets left to work with. 0/26 network: 00000000 But you need only 2 H bits, not 6.

In simple terms, a router that needs to advertise ten routes needs ten specific lines in its update packet. The more routes you have to advertise, the bigger the packet. The bigger the packet, the more bandwidth the update takes, reducing the bandwidth available to transfer data. But with route summarization, you can advertise many routes with only one line in an update packet. This reduces the size of the update, allowing you more bandwidth for data transfer. Also, when a new data flow enters a router, the router must do a lookup in its routing table to determine which interface the traffic must be sent out.

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CCNA Portable Command Guide by Scott Empson


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