Security Architecture: HA and Site Considerations Flashcards
How can you ensure High Availability?
Load Balancing
Clustering
Site Consideration
What are the key factors in Load balancing?
Load balancing: Evenly distributes incoming network traffic or computational tasks across multiple servers to:
Help prevent any single server from becoming overwhelmed.
Minimize the risk of downtime due to server failures or congestion.
AWS can offer a Horizontal approach to scalability (cloud) and used for HA.
Netflix servers live only for 24 hours then a new one replaces it this is for two things:
Security
HA
What are the key factors of clustering?
Clustering: Groups multiple interconnected servers or nodes together, enabling them to work collaboratively. This ensures that if one node fails, another can seamlessly take over its tasks, minimizing service disruptions and maintaining continuous operations.
Expensive and Sophisticated but it offers:
Security
High Availability
What are some of the sit considerations?
Site considerations:
Hot site: Ready for immediate cut-over from the main solution or infrastructure and that requires no time to ready for production.
Warm site: Requires a relatively small amount of time to be ready for production, as contrasted with a hot site.
Cold site: Requires considerable time and effort to have the site ready for production.
Geographic dispersion: When you’re choosing sites for high availability, you should consider choosing redundant sites that are geographically dispersed. - Cloud option
What is RTO?
RTO – How long does it take to get the network back up
what is RPO?
RPO – Where will you be in time of failure? Did you end up losing data during that failure upon bringing the network on site.
How many 9’s can it provide?
If you’re up 99.999% of the time how much are you down of the year you will be down less than a second per day.
This would be terrible in cloud environment which boast about 99.99999%
