3.3 High Availability and Disaster Recovery Flashcards

1
Q

In Load Balancing how are requests spread among devices on the network?

A

Client requests are spread from one active device to the next active device in an Active/Active system, or in the account of failover are sent from active device to passive device in a Active/Passive system.

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2
Q

Explain the three First Hop Redundancy Protocols (FHRP).

A

Hot Standby Router Protocol (HSRP):
Cisco proprietary
Routers running HSRP create a virtual router with a virtual MAC address

Gateway Load Balancing Protocol (GLBP):
Cisco proprietary

Virtual Router Redundancy Protocol (VRRP):
Standards based protocol

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3
Q

What is Mean Time Between Failure (MTBF)?

A

MTBF measures the reliability of a system or component.

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4
Q

What is Mean Time to Repair/Recovery (MTTR)?

A

How long, on average, will it take to repair a component that fails.
Time to recovery includes time for problem diagnosis and repair.

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5
Q

What is Recovery Time Objective (RTO)?

A

How long will it take for the system to be functional.

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6
Q

What is Recovery Point Objective (RPO)?

A

At what point (percentage) is the system considered functional.

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