Cisco Certified Network Professional Practice Test

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Prepare for your Cisco Certified Network Professional Test with confidence. Study using flashcards and multiple choice questions, each with detailed hints and explanations. Ensure your success on the exam!

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Which of the following is true about HSRP groups?

Only one group is allowed per interface
Groups are globally significant
They can range from 0-255
Group numbers cannot be reused

The correct answer is: They can range from 0-255

HSRP (Hot Standby Router Protocol) groups are used in failover scenarios to ensure high availability of routers. The key aspect regarding HSRP groups is that they can actually be numbered from 0 to 255, which means there are 256 possible group numbers. This range allows for flexibility in assigning group numbers to different router interfaces depending on the configuration needs of a network. When utilizing HSRP, administrators can choose from any of these numbers when establishing a group. This is particularly useful in larger networks where multiple HSRP configurations need to be managed across different routers and interfaces to provide redundancy. Being able to use a number from 0 to 255 allows for organizing and structuring HSRP groups efficiently according to network design. The understanding of group number limitations and their implications is crucial for network design and redundancy planning, as the selection of group numbers can determine how routers communicate and respond during failover events.