Which router device group summarizes for WAN sites on which level?

Which router device group summarizes for WAN sites on which level?
A. Core
B. Distribution
C. Access-layer within campus
D. Distribution in data center
E. WAN edge

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3 thoughts on “Which router device group summarizes for WAN sites on which level?

  1. Wording is tricky. Probably Core (A). Check this:

    https://www.ccexpert.us/network-design/route-summarization.html

    “It is a recommended practice to configure summarization in a large network from the distribution layers toward the core, as illustrated in Figure 7-18. The distribution layer should summarize all networks on all interfaces toward the Campus Core. WAN connectivity and remote access points should be summarized toward the core. For example, remote subnets could be summarized into major networks, and only those major networks would be advertised to the core.”

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