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The book starts with LAN Switching, then moves on to IP Addressing, ccna 200 301 2020 IP Routing (IGP & BGP), Quality of Service (QoS), WAN, IP Multicast, Security and finally Wireless Mobility. The book does not provide a lot of details but it is understandable since no single book can cover all CCIE Routing and Switching materials in one book. ccna 200 301 2020