By Glen E. Clarke
Prepare for Cisco's entry-level networking certification CCENT examination 640-822If you are getting ready for Cisco certification, your highway begins with CCENT examination 640-822 ICND1. This quantity covers every little thing you must comprehend! you are going to 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 can help you are making the grade.Discover CCENT certification — discover what the certification contains and what to anticipate at the examNetworks and Cisco units — examine networking fundamentals, all approximately ports, and the way to configure interfaces and companies resembling DHCP and NATData routing — discover static routing, dynamic routing protocols, and the way to manage the routing approach with the routing tableBe ready — study simple troubleshooting steps and instructions you should use on Cisco devicesCast a much wider web — get to grips with community defense, safeguard top practices, and huge quarter networks (WANs)Open the publication and find:Basic evidence of networkingIntroduction to TCP/IPHints for utilizing the Cisco IOSStep-by-step description of the routing processA advisor to simple configurationTroubleshooting adviceExam counsel for every topicAn exam-objective mapping tableDetailed examples of subnetting
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With this standard, the maximum cable distance is 100 meters. indd 39 10/15/10 11:19 PM10/15/10 11:19 PM 40 Understanding Network Architectures Table 2-4 summarizes some of the Ethernet architectures and their key points to know for the exam. Table 2-4 Ethernet Architectures Name Topology Access Method Cable Type Transfer Rate 10Base2 bus CSMA/CD Thinnet 10 Mbps 100BaseT star CSMA/CD Cat 5 UTP 100 Mbps 1000BaseTX star CSMA/CD Cat 5e UTP 1000 Mbps 1000BaseSX star CSMA/CD multimode fiber 1000 Mbps 1000BaseLX star CSMA/CD single-mode fiber 1000 Mbps 10GBaseSR star CSMA/CD multimode fiber 10 Gbps 10GBaseLR star CSMA/CD single-mode fiber 10 Gbps Token Ring Over the years, there have been network architectures outside of Ethernet that have been developed and used, but they have not been as popular as Ethernet.
119 Identifying Reasons to Subnet ................................................................... 122 Subnetting a Network .................................................................................. 124 Understanding Variable-Length Subnet Masks ........................................ 144 Chapter Summary ........................................................................................ 151 Lab Exercises ...............................................................................................
1000BaseSX: Uses multimode fiber-optic cabling to reach a maximum distance of 550 meters (1,804 feet). ✦ 1000BaseTX: This Gigabit Ethernet standard reaches 1000 Mbps but uses Cat 5e UTP cable instead of fiber-optic cabling. The difference between 100BaseT and 1000BaseTX is that 1000BaseTX uses all eight wires while 100BaseT only uses four. 10 Gigabit Ethernet standards The next level of Ethernet standards is to reach transfer rates of 10 Gbps. The 10 Gigabit Ethernet standards use a star topology, baseband transmission, and an access method of CSMA/CD.