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Objective 1.9200-301

1.9 Describe IPv6 address types.

Objective 1.9 sits in Network Fundamentals, which carries 20% of the CCNA exam. The questions below are original, written from the official objective title above, and each explanation cites the Cisco page it rests on.

Objective title verbatim from the official objectives. Cisco exam page ↗

A worked example

Shown solved, with the whole explanation open: this is what every question here carries.

1-9Network FundamentalsModerate

A design puts one identical IPv6 address on the loopback of three DNS resolvers in three cities, each advertised by the local router. How is a packet to that address delivered?

To every interface holding the address, in parallelDelivery to every holder is what multicast does, and a multicast address always begins with FF00::/8.
To one interface, the nearest by routing metricCorrect · your answerCorrect. Delivery goes to a single interface, chosen by routing distance.
To the interface that most recently advertised itThe address type records nothing about advertisement order. Ordinary path selection picks the winner.
To none of them until a tie-break is configuredNo tie-break exists or is needed. Several interfaces sharing one such address is the intended arrangement.

Correct.

Concept

One address on many interfaces is legal in IPv6, and the routing system alone settles which copy a packet reaches. Because the choice comes from ordinary path selection rather than any dedicated protocol, the destination a sender lands on can change when the topology does.

Why B

RFC 4291 calls this an anycast address: one assigned to more than one interface, where a packet sent to it is routed to the nearest of them by the routing protocols' measure of distance. Such addresses come out of the unicast space and are syntactically indistinguishable from it, so each resolver simply holds what looks like an ordinary address.

Source

#ipv6#anycast#address-types

Now you: objective 1.9 questions

No account needed. The explanation opens when you answer.

Sample question 1 of 3

1-9Network FundamentalsHard

A firm assigns site prefixes fd00:0:1::/48, fd00:0:2::/48 and so on, incrementing as each site opens. Why does this defeat the purpose of unique local addressing?

Sample question 2 of 3

1-9Network FundamentalsModerate

An engineer generates a unique local prefix for a site that will never use it on the public Internet. Which prefix follows the locally assigned format?

Sample question 3 of 3

1-9Network FundamentalsEasy

A capture shows a frame carrying an IPv6 packet destined to ff02::1:ff3a:2b01. From the leading bits alone, what kind of address is that?

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Read the sources

These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.

More objectives in Network Fundamentals