Copyright Goodheart-Willcox Co., Inc. Chapter 8 Overview of Network Security and Network Threats 259 Decimal value is represented in hexadecimal Goodheart-Willcox Publisher Figure 8-8. The packet sniffer Wireshark provides data in hexadecimal format at the bottom of the properties page. Goodheart-Willcox Publisher Figure 8-9. Converting a hexadecimal value of 40 into its decimal equivalent of 64. Also, be aware of the deci- mal equivalents for the letters used in hexadecimal. Hex Character 4 0 Positional Value 161 = 16 160 = 1 Result of Multiplication 4 × 16 = 64 0 × 1 = 0 Add the values to find the decimal equivalent. 64 + 0 = 64 Hexadecimal Letter Decimal Number A 10 B 11 C 12 D 13 E 14 F 15 Goodheart-Willcox Publisher Figure 8-10. In the IPv6 protocol, the first 64 bits of an address identify the net- work, while the last 64 bits identify the host. Position First 48 bits Next 16 bits Last 64 bits Meaning Global Routing Prefix Subnet Mask Host Interface ID Example 2000:0000:0000 0000 0000:2A33:4545:002B