Learning IPv6 is critical in your efforts to pass the BSCI exam and go earn your CCNP, and it's going to help your career network in the real world as well. IPv6 can be confusing at first, but like any other network such as Cisco or as a whole – learn one part at a time, master the fundamentals, and you're on your way to success. In Today we will look at types of IPv6 addresses.
In IPv4, a unicast address is simply an address used to represent asingle host, where multicast addresses represent a group of hosts and broadcasts are all hosts.
In IPv6, it is not so simple. There are actually several types of unicast addresses, each with its own separate function. This allows IPv6 data where it's supposed to go faster while conserving resources IPv4 router.
IPv6 offers two types of local addresses, link-local and site-local. Site-local addresses allow devices of the same organization, or site,data exchange. Site-local addresses are IPv6 equivalent of IPv4 addresses for private classes, as hosts that use them are able to communicate with each other throughout the organization, but these addresses can not be used to reach Internet hosts.
Site-local addresses and local connection are actually obtained from the MAC address of a host. Therefore, if the IPv6 address has HostA HostB, the host can determine the MAC address HostB from making unnecessary ARP.
Link-local addresses have a childscope than site-local. Link-local addresses are just that, local to a physical connection. These special addresses are not used at all in shipment data. Use of these addresses is Neighbor Discovery, which is the answer to IPv6 ARP.
You can identify these and other IPv6 addresses for their initial bits:
001 – Global Address
(First 96 bits set to zero) – IPv4-compatible
1111 1111 – Multicast
1111 1110 11 – local site
1111 1110 10 – LinkLocal
As a future CCNP, you're more familiar with the classes of IPv4 addresses reserved. You also know that they are not exactly contiguous. The developers of IPv6 has a structured approach for IPv6 addresses are reserved – Any address that starts with "0000 0000" is a reserved IPv6 address. One of these is the IPv6 loopback address, and this will give you some practice with your zero compression!
IP v6 Loopback: 0000:0000:0000:0000:0000:0000:0000:0001
Using zeroOnly compression: 0:0:0:0:0:0:0:1
The combination of zero and zero compression::: 1
Zero compression looks pretty good now, is not it? You just get used to it and keep rules in mind. You can use all zero compression you want, but zero compression ("double-colon) may be used only once in a single address.
IPv6 is here to stay, not only on your BSCI and CCNP exams, but in the real world as well. Hours to learn not only help you pass yourCisco exams, but to support IPv6 in the future.
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