Explanation
FHRP stands for First Hop Redundancy Protocol, which is a group of protocols that allow routers or switches to provide backup or failover for the default gateway in a network. FHRP ensures that the network traffic can reach its destination even if the primary gateway fails or becomes unavailable. Some examples of FHRP protocols are HSRP, VRRP, and GLBP.
References
1: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 18
2: CompTIA Network+ N10-008 Certification Practice Test, question 9
3: CompTIA Network+ Study Guide: Exam N10-008, 5th Edition, page 263
4: CompTIA Network+ (N10-008) Practice Exam w/PBQ & Solution, question 5
5: What's on the CompTIA Network+ 008 certification? | CompTIA, section 3.1

Out of band management is a process for accessing and managing network devices and infrastructure at remote locations through a separate management plane from the production network. Out of band management requires network devices to be managed using a different set of IP addresses than the ones used for in-band management or data traffic. This provides a secure and dedicated alternate access method to administer connected devices and IT assets without using the corporate LAN.