CCENT Certification All-In-One For Dummies by Glen E. Clarke

By Glen E. Clarke

Prepare for Cisco's entry-level networking certification CCENT examination 640-822If you are getting ready for Cisco certification, your street starts off with CCENT examination 640-822 ICND1. This quantity covers every thing you want to comprehend! you will study networking fundamentals and the way to paintings with Cisco units, routers, switches, and extra. With over six hundred pages, plus dozens of evaluate questions, this entire consultant may help you're making the grade.Discover CCENT certification — discover what the certification includes and what to anticipate at the examNetworks and Cisco units — examine networking fundamentals, all approximately ports, and the way to configure interfaces and companies akin to DHCP and NATData routing — discover static routing, dynamic routing protocols, and the way to manage the routing technique with the routing tableBe ready — research uncomplicated troubleshooting steps and instructions you should use on Cisco devicesCast a much broader internet — get to grips with community defense, protection top practices, and huge region networks (WANs)Open the ebook and find:Basic proof of networkingIntroduction to TCP/IPHints for utilizing the Cisco IOSStep-by-step description of the routing processA advisor to simple configurationTroubleshooting adviceExam information for every topicAn exam-objective mapping tableDetailed examples of subnetting

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A logical address is an address that you can assign to the system such as an IP address. Routing is the concept of delivering the data to the destination — which is one of the main roles of the network layer. I talk a lot more about logical addressing in Book I, Chapter 4. Book I Chapter 2 Introduction to Network Technologies made to ensure the data reaches the destination. The transport layer is also responsible for breaking the data into smaller, more manageable chunks, called segments. Each segment is then sent to the destination and will need to be reassembled at the transport layer on the receiving system.

Book I Chapter 2 WorkstationB wires Pin 1 Tx+ 2 Tx– 3 Rx+ 6 Rx– Introduction to Network Technologies Figure 2-13: Making the WorkstationA mistake of using a Pin straightTx+ 1 through Tx– 2 cable to Rx+ 3 connect Rx– 6 two systems together. 33 WorkstationB wires Pin 1 Tx+ 2 Tx– 3 Rx+ 6 Rx– Remember that crossover cables are used to connect similar devices together — such as two systems, two switches, or a system to a router. ) The last thing I want to mention about crossover cables is that most companies make it a policy that a crossover cable that is purchased or created must be a different color than a straight-through cable.

Indd 23 10/15/10 11:19 PM10/15/10 11:19 PM 24 Identifying Network Topologies Star topology The star topology is a network layout that involves using a central device such as a switch as the connection point for all systems on the network. When looking at Figure 2-5, you notice that when WorkstationA wants to send data to WorkstationD, the data travels from WorkstationA to the switch, which then sends the data on to WorkstationD. A B Windows client Figure 2-5: A star topology uses a central device such as a switch to connect all systems.

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