SSCP Systems Security Certified PractitionerNetwork and Communications SecurityMedium
A company is deploying a new application that requires high availability and resilience against network outages. The application servers are located in two different data centers. To ensure that user traffic is directed to the optimal server and automatically fails over in case of an issue, which network service would be most appropriate?
- AGlobal Server Load Balancing (GSLB)
- BNAT
- CDHCP
- DDNSSEC
Show answer & explanationAnswer & explanation
Correct answer: A. Global Server Load Balancing (GSLB)
Global Server Load Balancing (GSLB) distributes user traffic across multiple servers in different geographic locations (data centers), providing high availability and disaster recovery by directing users to the best-performing or available server.
Why the other options are wrong
- B. NAT (Network Address Translation) translates IP addresses and is not designed for load balancing or failover across multiple data centers.
- C. DHCP (Dynamic Host Configuration Protocol) assigns IP addresses to devices and is not used for traffic distribution across data centers.
- D. DNSSEC (Domain Name System Security Extensions) adds security to DNS by authenticating DNS responses, but it does not provide load balancing or failover capabilities.
Global Server Load Balancing (GSLB)
A traffic management technique that distributes user requests across multiple servers located in different geographic regions or data centers.
- Provides high availability and disaster recovery.
- Directs users to the closest or best-performing server.
- Often uses DNS to direct clients to the appropriate data center.
Memory trick: High Availability Requires Good Load Balancing, especially Globally.