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].
Your IP address is your computer's unique address on the Internet. An IPv4 address consists of four numeric segments separated by periods (e.g., 64.236.16.116), and is different from the MAC address of your Ethernet card. If you have IPv6 enabled, you will also have an IPv6 address. Your IPv6 address will look different from the IPv4 dotted decimal format.