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.
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.
