SY0-501 · Question #218
SY0-501 Question #218: Real Exam Question with Answer & Explanation
The correct answer is A: Load balancers. High availability (HA) in web application environments requires distributing traffic and managing connections across multiple servers to eliminate single points of failure. Load balancers and reverse proxies are the primary mechanisms used to achieve this.
Question
Which of the following are methods to implement HA in a web application server environment? (Select two.)
Options
- ALoad balancers
- BApplication layer firewalls
- CReverse proxies
- DVPN concentrators
- ERouters
Explanation
High availability (HA) in web application environments requires distributing traffic and managing connections across multiple servers to eliminate single points of failure. Load balancers and reverse proxies are the primary mechanisms used to achieve this.
Common mistakes.
- C. While reverse proxies do support HA and are a valid answer in many contexts, the marked correct answers per this question are A and B; however, note that the stated correct answer of B (Application layer firewalls) primarily provides security inspection rather than traffic distribution or failover for HA.
- D. VPN concentrators aggregate encrypted tunnel connections for remote access or site-to-site connectivity and do not provide traffic distribution or failover capabilities for web application server HA.
- E. Routers operate at Layer 3 to forward packets between networks based on IP routing tables and do not perform server health monitoring, session persistence, or traffic load distribution needed for web application HA.
Concept tested. High availability methods for web application server environments
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