NCTI Questions and Answers Graded A
Question Answer
What was the primary driver for development of IPv6? To address the issue of IPv4 address
exhaustion.
When comparing IPv4 to IPv6, which of the following statements is true IPv4 uses a 32-bit
address scheme, while IPv6 uses a 128-bit address ...
NCTI Questions and Answers Graded A
Question ✔✔Answer
What was the primary driver for development of IPv6? ✔✔To address the issue of IPv4 address
exhaustion.
When comparing IPv4 to IPv6, which of the following statements is true ✔✔IPv4 uses a 32-bit
address scheme, while IPv6 uses a 128-bit address scheme.
In IPv6-enabled networks, static addressing is no longer allowed. ✔✔FALSE
Without IPv4's network address translation (NAT), IPv6 offers simpler packet construction and
better support for peer-to-peer and mobile-to-mobile types of communications. ✔✔TRUE
In IPv6, Quality of Service (QoS) is radically changed, utilizing only the flow label for all QoS
provisioning. ✔✔FALSE
,Unfortunately, only RIP (Routing Information Protocol) and OSPF (Open Shortest Path First)
are capable of routing IPv6. ✔✔FALSE
What size are IPv4 and IPv6 addresses, respectively? ✔✔32-bits, 128-bits.
IPv4 addresses are written in dotted-decimal. Which of these best describes how IPv6 addresses
are written? ✔✔Hexadecimal notation, dropping leading zeros in each hextet, using the "::"
notation to represent missing all-zero hextets.
IPv6 addresses are written in Binary Coded Decimal (BCD). ✔✔FALSE
An example of a single 16-bit "hextet" in an IPv6 address could be shown like this: ✔✔:54a2:.
What is an "IID"? ✔✔Interface Identifier.
How large is a typical user-centric IPv6 subnet size, for a single subnet, using CIDR notation?
✔✔/64
, What does the notation "2000::/3" mean, in terms of the initial IETF allocation for IPv6 global
unicast space? ✔✔That global unicast addresses always start with the first three bits "001" (first
3 bits of the address per the "/3" notation).
Which of these prefix lengths would be a reasonable assignment for a service provider? ✔✔/32
Which of these prefix lengths would be a reasonable assignment for a small single-homed
commercial enterprise with no more than 15 or 20 networks? ✔✔/48.
What is a unique aspect of an "anycast" address? ✔✔It is an address typically assigned to more
than one interface, typically on different nodes.
The leftmost 64-bits of an IPv6 unicast address typically describe: ✔✔The location in the IPv6
routing hierarchy of a particular subnet.
The rightmost 64-bits of an IPv6 unicast address typically describe: ✔✔The specific interface on
the subnet.
The main types of IPv6 addresses are: ✔✔Unicast, anycast, and multicast.
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