The redundant links enable data to be sent over several different paths. Reconfiguration, like installation, gets progressively more difficult as the number of devices increases. The major advantage of the mesh topology is fault tolerance. Other advantages include guaranteed communication channel capacity and the fact that mesh networks are relatively easy to troubleshoot. Disadvantages include the difficulty of installation and reconfiguration, as well as the cost of maintaining redundant links.
Terminology is important.
Although it varies depending on the pool of questions you get, I had about 10 such questions where 2 similar questions each time had the same required results but had different or and added proposed solution. MCP magazine outlined the key points to study for the exam, this is what I used. I believe it was in last months. Know the difference between a Volt-Ohm Meter, a Protocol Analyzer, and a Time Domain Reflectometer, and what each one is used for. Know the differences between Repeaters, Routers, Bridges, Brouters, Gateways, Hubs, etc, and in which cases you would need one or the other.