CCNA Routing and Switching Practice Test Results

Question 1
56% answer correctly
You are working in a data center environment and are assigned the address range 10.188.31.0/23. You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each. Which IP address range meets these requirements?
10.188.31.0/29
10.188.31.0/25
10.188.31.0/26
10.188.31.0/28
10.188.31.0/27
Question 2
35% answer correctly
Which IPv6 address is valid?
2001:0db8:0:130H::87C:140B
2031:0:130F::9C0:876A:130B
2001:0db8:0000:130F:0000:0000:08GC:140B
2031::130F::9C0:876A:130B
Question 3
60% answer correctly
Which parameter can be tuned to affect the selection of a static route as a backup, when a dynamic protocol is also being used?
link delay
link bandwidth
hop count
administrative distance
link cost