I had 1 question involving VLSM but it was very basic.
The CCNA 640-801 exam tests more in-depth knowledge of the ICND 2.x course. The exam covers topics such as:
1. Switching configuration
2. OSPF and EIGRP routing protocols (Open Shortest Path First and Enhanced Interior Gateway Routing Protocol)
3. VLSM (Variable Length Subnet Masking)