By Allan Johnson
I admire this e-book! It features a pullout 31 day calendar within the entrance, with a couple of themes in keeping with day for research. contained in the ebook isn't really a number of questions ( so do not count on this to be simply one other run of the mill perform exame booklet ), the writer offers an encapsulated evaluate on each one subject, via EXAMPLES of the way to do what was once simply reviewed. *It's a 31-day, simply readable, condensed completely, textbook! (The excellent spouse for your CCNA perform examination books)
Read or Download 31 Days Before Your CCNA Exam: A day-by-day review guide for the CCNA 640-802 exam (2nd Edition) PDF
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Extra info for 31 Days Before Your CCNA Exam: A day-by-day review guide for the CCNA 640-802 exam (2nd Edition)
Enterprise Data Center Architecture: Manages and maintains the enterprise’s data systems (such as its server farms). ■ Enterprise Teleworker Architecture: Connects employee home offices and “road warriors” to the network resources of the enterprise. Figure 31-4 shows a graphical representation of the Cisco Enterprise Architecture and how each module interconnects. Figure 31-4 Modules of the Enterprise Architecture The Enterprise Architecture Enterprise Campus Enterprise Edge Building Access WAN and Internet Enterprise Branch E-Commerce ISP A Building Distribution Internet Connectivity ISP B Enterprise Data Center Campus Core WAN and MAN Site-to-Site VPN Frame Relay, ATM, Man....
Each layer provides specific functions that define its role within the overall network. By separating the various functions that exist on a network, the network design becomes modular, which facilitates scalability and performance. The hierarchical design model is broken up into three layers as follows: ■ Access layer: Provides local and remote user access ■ Distribution layer: Controls the flow of data between the access and core layers ■ Core layer: High-speed redundant backbone Figure 31-3 shows an example of the hierarchical model.
Features of access layer switches include the following: ■ Port security ■ VLANs ■ Fast Ethernet/Gigabit Ethernet ■ Power over Ethernet (PoE) ■ Link aggregation ■ Quality of service (QoS) Cisco access layer switches include the Catalyst Express 500, Catalyst 2960, Catalyst 3560, and Catalyst 3750 Catalyst product lines. Distribution Layer Switches Distribution layer switches receive the data from the access layer switches and forward the data to the core layer switches. Features of distribution layer switches include the following: ■ Layer 3 support ■ High forwarding rate ■ Gigabit Ethernet/10 Gigabit Ethernet ■ Redundant components ■ Security policies/access control lists ■ Link aggregation ■ Quality of service (QoS) Cisco distribution layer switches include the Catalyst 4500, Catalyst 4900, and Catalyst 6500 product lines.