Cisco Certified Network Associate (CCNA) Practice Exam

What is the maximum number of logical groups in the Gateway Load Balancing Protocol?

1. 512

2. 1,024

3. 256

4. 128

The correct answer is: 1,024

The maximum number of logical groups in the Gateway Load Balancing Protocol (GLBP) is indeed 1,024. This is a key feature of GLBP, which allows for redundancy and load sharing across multiple gateways in a network. Each logical group can include multiple virtual gateway addresses, enabling traffic to be distributed effectively among the available virtual routers. GLBP functions by allowing routers to act as a single virtual router (the GLBP gateway) to clients. This enhances both redundancy and reliability, as if one gateway fails, the others can continue to serve the traffic. Each logical group can manage its own set of routers, with the ability to load balance traffic across those routers while maintaining awareness of their status and availability. By offering support for up to 1,024 logical groups, GLBP provides network administrators considerable flexibility in designing their load balancing strategies. This scalability allows organizations to create robust and efficient network architectures that can adapt to various levels of traffic demands and redundancy requirements.