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      單項(xiàng)選擇題

      Which unique characteristics of the Data Center Aggregation layer must be considered by an Enterprise Campus designer?()

      A. Layer 3 routing between the Access and Aggregation layers facilities the ability to span VLANsacross multiple access switches, which is a requirement for many server virtualization andclustering technologies.
      B. “East-west” server-to-server traffic can travel between aggregation modules by way of the core,but backup and replication traffic typically remains within an aggregation module.
      C. Load balancing, firewall service, and other network service are commonly integrated by the useof service modules that are inserted in the aggregation switched.
      D. Virtualization tools allow a cost effective approach for redundancy in the network design byusing two or four VDCs from the same physical switch.

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      • 單項(xiàng)選擇題

        When designing the Network Admission Control (NAC) Appliance for the Enterprise Campus Network, which of the following requirements would help the designer to narrow down the NAC choices, from Virtual Gateway to Real IP Gateway, or from In-band to Out-band?()

        A. QoS ToS/DSCP values are required to be forwarded transparently
        B. Device redundancy is required
        C. Per-user ACL support is required
        D. Multicast service support is required

      • 多項(xiàng)選擇題

        What are two characteristics of Server Load Balancing router mode?()

        A. The design supports multiple server subnets Cisco 642-874: Practice Exam
        B. An end-user sees the IP address of the real server
        C. SLB routes between the outside and inside subnets
        D. The source or destination MAC address is rewritten, but the IP addresses left alone
        E. SLB acts as a "bump in the wire" between servers and upstream firewall or Layer 3 devices

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