Answer the questions as directed with multiple paragraphs, where each paragraph would have at least more than $10$ lines. provide citations

Question $1$: $(10$ points$)$

a$)$ define a disaster or system failure

b$)$ Provide an example where synchronous and asynchronous disk mirroring in data center is being utilized

c$)$ how would a disaster impact primary and second data center implementing disk mirroring in a network where business continuity fails after a disaster

d$)$ design an enterprise network architecture with core nodes and edge nodes, where core nodes represent data center providing services to the edge nodes, edge nodes act as clients, each edge node is connected to at least to core nodes through virtual connections $($Permanent and Switched$),$ please provide details how your disaster recovery would avoid impact first or second or third data center, consider a factor like geographical areas, types of virtual connections between edge nodes and local or remote core nodes. Show an example of your network in a diagram by drawing enterprise network with core and edge nodes

e$)$ Show how a disaster recovery and business continuity are implemented in your example in d$)$