Cisco Certified Network Associate (CCNA) Practice Exam

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What is the main purpose of Gateway Load Balancing Protocol (GLBP)?

Routes traffic to a single gateway across routers
Provides redundancy for default gateways
Enables load balancing between multiple routers
Supports static IP address assignment

The correct answer is: Enables load balancing between multiple routers

The main purpose of Gateway Load Balancing Protocol (GLBP) is to enable load balancing between multiple routers. GLBP allows multiple routers to work together to present a single virtual gateway to hosts on a local area network (LAN). This virtual gateway can distribute client requests among several physical gateways, which helps in efficiently balancing the traffic load. By doing so, GLBP improves network reliability and performance, as it can utilize the available bandwidth across multiple devices instead of routing all traffic through a single gateway. While redundancy for default gateways is an important aspect of GLBP, the central feature that GLBP provides is the load balancing capability among the participating routers, which enhances overall network resource utilization. This feature ensures that traffic is not concentrated on a single router, reducing the risk of overload and potential failure.