Cisco Routers for the Desperate: Router and Switch by Michael W. Lucas

By Michael W. Lucas

Cisco routers and switches are the cornerstones of many networks. but if issues holiday, upkeep can intimidate even the main powerfuble administrator. fortunately, simply realizing the "in case of emergency" fundamentals will take you far.

Just just like the unique, this moment version of the hugely acclaimed Cisco Routers for the Desperate is written for the administrator in concern mode. up-to-date to hide switches and the most recent Cisco terminology, with a tighter concentrate on the wishes of the small community administrator, this moment variation grants what you want to understand to supply trustworthy community prone and fasten difficulties speedy. You'll locate insurance of:
* Installation—how to get your router and community connections up and working correct the 1st time
* Troubleshooting routers and switches, so you might verify no matter if your or the net is broken
* safeguard issues, like how one can hold your community gear secure from hackers and set up a personal community among offices
* tips to enforce uncomplicated community redundancy to lessen the chance of community downtime

Cisco Routers for the determined, second Edition is designed to be learn as soon as and left by myself until eventually anything breaks. whilst it does, you'll have every thing you must comprehend in a single easy-to-follow guidebook.

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When the packets arrive in a switch, the switch decrements the current TTL value in the packet before forwarding it by the instructions of the flow table, and the packet could not forward to other switches when TTL comes to 0 or it arrives at the destination. Then, we send 100 packets on PC_01 to PC_02 and use the Wireshark to capture the packets on the switches in the link. In Table 2, we compare two situations of whether running this component. It could easily find that the number of the packets is many times than without running this module.

In this work, we present POFOX, a SDN controller for POF. Unlike the Huawei controller, POFOX is highly flexible and enables users to manage the POF devices with Python programs. In the design and implementation of POFOX, we have borrowed the programming model and the basic architecture of POX [9], a very popular OpenFlow controller, and re-design and re-code the key components of the controller such as the communication engine and the topology discovery component to support the POF devices. We have also constructed the first programmable POF network testbed with POFOX, and examine the network’s performance with real-world experiments.

1 Dataset The data source we choosed in the experiment is Douban dataset. More specially, most friends on Douban actually know each other offline and the friendship is symmetrically. It is an ideal source for our research on social recommendation. The dataset contains three aspects: music, book, and movie. In the paper, we randomly select 80 % of the ratings to train the models. 36 Z. Zhang and H. Shen Table 1 Statistics of friend relationship and shared friends Statistics Music Book Movie Max.

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