Cisco Certified Network Associate (CCNA) Practice Exam

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What is the primary function of GLBP in a network?

  1. Load balancing among multiple gateways

  2. Providing firewall protection

  3. Network address translation

  4. Routing data packets

The correct answer is: Load balancing among multiple gateways

The primary function of GLBP, or Gateway Load Balancing Protocol, is to load balance traffic among multiple gateways. GLBP allows a group of routers to present a single virtual router IP address to the hosts on a local network. When a host sends a packet to the default gateway, GLBP distributes the traffic across the available routers in the group, thus ensuring better utilization of network resources and providing redundancy. This means that if one of the routers in the GLBP group fails, traffic can be seamlessly redirected to the other operational routers, maintaining network availability and performance. Load balancing effectively helps to prevent any single router from becoming a bottleneck, improving overall network efficiency. In contrast, providing firewall protection, network address translation, and routing data packets are functions associated with different networking protocols and devices. These options do not align with the specific role of GLBP in managing gateway redundancy and balance.

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