CMSiMDE

IPv6 Data Flows IPv6數據流

Data flows in IPv6 are similar to those in IPv4. In fact, unicast and multicast work identical to their IPv4 counterparts. But, because there is no broadcast in IPv6, it has been replaced with “anycast.” Anycast allows data to travel from a single source device to the nearest of multiple, but specific, devices on a network. Anycasting is designed to let one host initiate the efficient updating of router tables for a group of hosts. IPv6 can determine which gateway host is closest and sends the packets to that host as though it were a unicast communication. In turn, that host can anycast to another host in the group until all routing tables are updated.

IPv6中的數據流類似於IPv4中的數據流。實際上，單播和多播的工作方式與IPv4相同。但是，由於IPv6中沒有廣播，因此已將其替換為“任何廣播”。 Anycast允許數據從單個源設備傳輸到網絡上多個（但特定的）設備中最接近的一個。任意廣播旨在讓一個主機為一組主機啟動路由器表的有效更新。 IPv6可以確定哪個網關主機最接近，並將數據包發送到該主機，就好像它是單播通信一樣。相應地，該主機可以向組中的另一台主機任意廣播，直到更新所有路由表為止。

Which of the following is not a benefit of IPv6 over IPv4?

More IP addresses.Does not allow packets to be fragmented during data transmission.Allows for dual stack implementation.There are 12 fields of data in the packet header, instead of five.

Rewrite the IPv6 address 1122:0000:1122:0000:1122:0000:0112:1122. Do not use any spaces in typing your answer.

Rewrite the IPv6 address 1122:0000:0000:0000:1234:0001:0002:0003. Do not use any spaces in typing your answer.