Taxation begins at the time of exercise. The bargain element of a non-qualified stock option is considered compensation and is taxed at ordinary income tax rates. For example, if an employee is granted 100 shares of Stock A at an exercise price of $25, the market value of the stock at the time of exercise is $50.
In the Internet Protocol version 4 (IPv4) [RFC791] there is a field called Protocol to identify the next level protocol. This is an 8 bit field. In Internet Protocol version 6 (IPv6) [RFC2460], this field is called the Next Header field. Values that are also IPv6 Extension Header Types should be listed in the IPv6 Extension Header Types registry at [IANA registry ipv6-parameters].
I use the APIPA address range for link local connections similiar in idea to link local addresses in IPv6. Most of the time they are used for the failover connection between firewall peers and but I have also used them as the physical interface IP address on the routers on each end of a metro ethernet P2P connection over which I configured a GRE virtual tunnel interface.