Discussion CLI, VLANs, and Subnetting

In your original post, discuss the following:

• What does VLSM stand for? Why is it used and what shortcomings does it help resolve on a network? 
• Provide an example of VLSM, make sure to include IP address, subnet  mask, number of networks and number of hosts. How do you determine this  information?
• What is a VLAN? Compare and contrast an access port and trunk port.   Provide a “real world” scenario where an access port would be used as  well as a trunk port.