When designing the routing for an Enterprise Campus network it is important to keep while of thefollowing filtering aspects in mind？（）

• A、 Filtering is only useful when combined with route summarization
• B、 It is best to filter （allow） the default and summary prefixes only in the Enterprise Edge to remotesites or site-to-site IPsec VPN networks
• C、 IGPs （for example EIGRP or OSPF） are superior to route filtering in avoiding in inappropriatetransit traffic through remote nodes or inaccurate or inappropriate routing updates
• D、 The primary limitation of router filtering is that it can only be applied on outbound updates