Are you studying for the CCENT or CCNA certifications?

Skillset can help you prepare! Sign up for your free Skillset account and take the first steps towards your certification.

Upgrade Account

Refer to the exhibit. A network administrator consistently notices an unusual behavior on the network. As shown in the graphic, Spanning-tree Protocol is enabled on the network as well as duplex modes on each link. What could be the reason for this unusual behavior?

either an ISP-side configuration or a network glitch is causing the problem

a software bug on one of the switches is causing the problem

a bridging loop is causing the problem

a routing loop is causing the problem



Skillset helps you pass your certification exam.

Contributions and Interactions
Practice Questions

Study thousands of practice questions that organized by skills and ranked by difficulty.

Contributions and Interactions
Personalized Training

Create a tailored training plan based on the knowledge you already possess.

Training Video Selector
Exam Readiness

Know when you’re ready for the high-stakes exam. Have the confidence that you will pass on your first attempt.

Get A Free Skillset Account