cisco ccna blueprint

cisco ccna blueprint.. Simplified encapsulation: IPv6 encapsulation is simpler than IPv4, which improves the forwarding speed and routing efficiency of routers. The absence of checksums in packets reduces the processing burden on endpoints. No broadcasts are used, reducing device usage in the subnet. QoS information is built into IPv6 headers - where flow labels are used to identify flows, which allows intermediate network devices to classify traffic to support QoSo without having to look at the content of the packet (TCP/UDP header and payload). Addressing capabilities: As with IPv4, addresses can be statically assigned or obtained via DHCPv6. However, unlike IPv4, IPv6 supports stateless auto-configuration, allowing devices to automatically obtain addressing information without implementing a DHCP server.. Transition Features: When migrating from IPv4 to IPv6, various solutions that support the coexistence of IPv4 and IPv6 are available. One approach is dual-stack, which allows you to run both protocols on the device interface. Another approach is tunneling, which allows you to use IPv4 to create IPv6 tunnels (or vice versa) to carry traffic of one IP version over the other IP version of the network. Cisco also supports the use of a third method, network address translation. Protocol Translation (NAT-PT) converts between IPv4 and IPv6 (where the "protocol" is sometimes referred to as a "proxy").Be sure to familiarize yourself with the IPv6 features described above.Certification H Standard 23.0223.2 IPv6 AddressingThe thing that scares most administrators about IPv6 addresses is how different they really are from IPv4 addresses. It may seem difficult to figure out how much longer4 times longer addresses seems difficult, but as you will see in this chapter, the TCP/IP standards organization has made it as simple as possible.23.2.1 IPv6 Address FormatIPv4 addresses use a dotted decimal format, where each byte has a value range of 0.255; IPv6 addresses contain 8 parts separated by a colon (:), each part being 4 hexadecimal bits (16 binary bits), as follows