What protocol or technology defines a group of routers, one of them defined as active and another one as standby?
- EtherChannel
- VTP
- HSRP
- DTP
Explanation: Hot Standby Router Protocol (HSRP) is a Cisco-proprietary First Hop Redundancy Protocol (FHRP) designed to provide default gateway redundancy. It operates by grouping multiple physical routers into a single virtual router where one device is elected as active to forward packets, while another is designated as standby to monitor the group and take over forwarding responsibilities if the active device fails.
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