350-401 Question 118
Single answerA network administrator is configuring a high-availability solution for a critical server farm. The requirements are as follows: traffic must be load-balanced across multiple links, and if one link fails, traffic should be rerouted automatically without disruption. Which technology should the administrator implement to meet these requirements?
- A
Link Aggregation Control Protocol (LACP)
- B
Hot Standby Router Protocol (HSRP)
- C
Virtual Router Redundancy Protocol (VRRP)
- D
Multiprotocol Label Switching (MPLS)
Show answer and explanation
Correct answer: A
Explanation
Link Aggregation Control Protocol (LACP) is the correct choice because it allows multiple physical links to function as a single logical link, providing both load balancing and automatic failover. This directly addresses the scenario's requirements. HSRP and VRRP are used for gateway redundancy and do not provide the needed link aggregation. MPLS, while useful in other contexts, is not relevant to the described local high-availability solution.
- A. Correct.
LACP provides link aggregation by bundling multiple physical links into a single logical link, ensuring load balancing and failover capabilities. This meets the specified requirements of traffic distribution and automatic rerouting upon link failure.
- B. Incorrect.
HSRP is designed for router redundancy and provides failover for a default gateway, but it does not perform link aggregation or load balancing.
- C. Incorrect.
VRRP is similar to HSRP and is used for gateway redundancy but does not provide link aggregation or load balancing.
- D. Incorrect.
MPLS is a protocol for high-performance traffic routing and is typically used in WAN environments. While it supports traffic engineering, it does not directly address link aggregation or local failover in the described scenario.