1. What is the recommended prefix length for most IPv6 subnets?
- /32
- /48
- /64
- /128
Explanation: Most IPv6 subnets will have a prefix length of /64.
2. Which part of a GUA is assigned by the ISP?
- Global Routing Prefix
- Global Routing Prefix and Subnet ID
- Prefix
- RIR Prefix
Explanation: The global routing prefix is the part of a GUA that is assigned by an ISP.
3. Which type of IPv6 unicast address is not routable between networks?
- unique local address
- GUA
- embedded IPv4 address
- LLA
Explanation: Link-local IPv6 addresses are for link only communication and are not routable.
4. True or False: The Subnet ID field in an GUA must borrow bits from the interface ID.
- True
- False
Explanation: The correct answer is False. GUAs do not use a bit from the interface ID to create subnets.
5. What type of IPv6 address begins with fe80?
- GUA
- LLA
- multicast address
- None. An IPv6 address must begin with 2001
Explanation: Link-local IPv6 addresses start with the prefix fe80.