In a three-tier hierarchical campus network design, which action is a design best-practice for the core layer?

Refer to the exhibit.

Only administrators from the subnet 10.10.10.0/24 are permitted to have access to the router. A secure protocol must be used for the remote access and management of the router instead of clear-text protocols. Which configuration achieves this goal?

AN engineer is implementing a route map to support redistribution within BGP. The route map must configured to permit all unmatched routes. Which action must the engineer perform to complete this task?

"HTTP/1.1 204 content" is returned when cur -I -x delete command is issued. Which situation has occurred?

Which router is elected the IGMP Querier when more than one router is in the same LAN segment?