CCST IPv4 vs. IPv6 Addressing 2

Question 1

How many bits are in an IPv6 address compared to an IPv4 address?

Accepted Answer

IPv6: 128 bits, IPv4: 32 bits

Answer

IPv6 is 128 bits (eight groups of hex digits); IPv4 is 32 bits (dotted decimal), providing vastly larger address space.

Question 2

Which transition mechanism encapsulates IPv6 packets within IPv4 packets?

Accepted Answer

Tunneling

Answer

Tunneling wraps IPv6 packets inside IPv4 packets for transport across IPv4-only infrastructure.

Question 3

What type of IPv6 address begins with fe80::/10 and is used for single-segment communication?

Accepted Answer

Link-local

Answer

Link-local addresses (fe80::/10) are auto-assigned and limited to the local network segment, not routable beyond it.

Question 4

Which protocol replaced ARP in IPv6 for address resolution?

Accepted Answer

NDP (Neighbor Discovery Protocol)

Answer

IPv6 uses NDP with ICMPv6 Neighbor Solicitation/Advertisement messages instead of ARP broadcasts.

Question 5

What advantage does IPv6 provide regarding IPsec support?

Accepted Answer

IPsec is a mandatory part of the IPv6 specification while optional in IPv4

Answer

IPsec was built into the IPv6 specification from the beginning, while it is optional for IPv4.

(CCST) Cisco Certified Support Technician Practice Test