What is the primary purpose of NAT64 in IPv6 transition?

To run both IPv4 and IPv6 stacks on the same device.

To encapsulate IPv6 packets inside IPv4 packets for tunneling.

To provide a public IPv6 address to multiple private IPv4 addresses.

To translate IPv6 packets to IPv4 packets so IPv6-only hosts can communicate with IPv4-only servers.

In SLAAC, how does a host typically generate the interface identifier portion of its IPv6 address?

From the EUI-64 format based on the interface's MAC address, or from a randomly generated value.

From the network prefix provided in the RA.

From a DHCPv6 server-assigned value.

A company is planning to deploy IPv6 in a phased approach. They want to run both IPv4 and IPv6 on their existing network infrastructure, allowing hosts to communicate using either protocol. Which transition mechanism should they implement?

Dual-stack, because it allows hosts to have both IPv4 and IPv6 addresses and communicate using either protocol.

Teredo, because it provides IPv6 connectivity over IPv4 UDP tunnels, which is suitable for NAT traversal.

NAT64, because it translates IPv6 packets to IPv4 packets, allowing IPv6-only hosts to communicate with IPv4-only hosts.

6to4 tunneling, because it encapsulates IPv6 packets in IPv4 headers to traverse IPv4-only networks.

A security analyst is monitoring an IPv6 network and notices that a host is sending Router Advertisements with a very short prefix lifetime. This causes other hosts to frequently regenerate their IPv6 addresses. What is the likely intent of this attack?

To perform a man-in-the-middle attack by redirecting traffic to the attacker.

To cause a denial-of-service by forcing hosts to constantly reconfigure their addresses.

To bypass firewall rules by changing the source address.

To prevent hosts from using privacy extensions.

GIAC Certified Intrusion Analyst

Domain 1Objective 3

IPv6 GCIA Practice Questions (Page 4)

Part of the Network Fundamentals domain, which makes up ~35% of our current practice bank. GIAC (SANS) does not publish an official question count, but from its 240-minute exam (~95–160 total, ~33–56 in this domain), expect 7–11 from this objective — we provide 36 practice questions to prepare you well beyond it. (estimate)

36questions here

8free pages

8concepts

Questions 16–20

16foundation · easy
What is the primary purpose of NAT64 in IPv6 transition?
Select an answer first
17foundation · easy
Which field is present in the IPv4 header but is NOT included in the fixed IPv6 base header?
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18foundation · easy
In SLAAC, how does a host typically generate the interface identifier portion of its IPv6 address?
Select an answer first
19application · medium
A company is planning to deploy IPv6 in a phased approach. They want to run both IPv4 and IPv6 on their existing network infrastructure, allowing hosts to communicate using either protocol. Which transition mechanism should they implement?
Select an answer first
20expert · hard
A security analyst is monitoring an IPv6 network and notices that a host is sending Router Advertisements with a very short prefix lifetime. This causes other hosts to frequently regenerate their IPv6 addresses. What is the likely intent of this attack?
Select an answer first

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