cisco ccna cert

cisco ccna cert.Authentication H-label 23.0423.4 Address AssignmentTo assign IPv6 addresses to an interface, four methods can be used, two of which are static and the remaining two are dynamic. The next few subsections discuss these methods.23.4.1 Static Address AssignmentTo statically assign a unicast address to a device interface, one of the following two methods can be used.. Manually assigning all 128 bits.. Manually specify the first 64 bits and use EUI-64 to obtain the next 64 bits.You can manually specify all 128 bits of the address, or you can specify only the subnet ID, and have the device use the EUI-64 method to generate the interface ID portion of the address. When entering the complete address manually, do not forget to simplify the multiple, concatenated, all-zero parts to ::. Most network administrators typically use the EUI-64 method.23.4.2 DHCPv6DHCPv6 is an upgraded version of the DHCP protocol in IPv4 and works similarly to the previous version, but with several differences. In IPv6, DHCPv6 is referred to as stateful autoconfiguration. The client must first look up the router on the link through the neighbor discovery process; if the router is found, the client will check the router notification message to see if DHCPv6 is configured. o If the router indicates out that DHCPv6 is supported, or if no router notification message is received, the client will generate a DHCP request message to find a DHCPv6 server. Such messages are sent to multicast addresses that indicate all DHCP proxies and are local to the link, ensuring that messages are not forwarded outside the local link by default. A proxy can be a DHCP server or a relay proxy, such as a router.