Chapter Questions
How many class $A, B$, and $C$ networks can exist? How many hosts can a network in each class have? Be careful to allow for broadcast as well as class $D$ and $E$ addresses.
If your site uses IPv4, find out what size address mask is used. How many hosts does it permit your site to have?
Does your site permit IPv4 directed broadcast packets? (Think of a way to test by using ping.)
If your site uses IPv6, try sending a ping to the all-nodes multicast address. How many responses are received?
If your site uses IPv6, find out when IPv6 was first deployed.
What is the chief difference between the IP addressing scheme and the U.S. telephone numbering scheme?
The address registries around the world cooperate to hand out blocks of IP addresses. Find out how they ensure no ISP is given addresses that overlap with those given to another ISP.
How many IPv 6 addresses would be needed to assign a unique address to every house in your country? The world? Is the IPv 6 address space sufficient?
Suppose each person on the planet had a smart phone, laptop computer, and ten other devices that each had an IPv6 address. What percentage of the IPv 6 address space would be required?