Question 1

What is IPv6 address compression?

Accepted Answer

IPv6 compression replaces the longest consecutive group of zeros with :: to shorten the address. For example, 2001:0db8:0000:0000:0000:0000:0000:0001 becomes 2001:db8::1.

Question 2

What is IPv4-mapped IPv6?

Accepted Answer

IPv4-mapped IPv6 addresses embed an IPv4 address in the last 32 bits using the format ::ffff:w.x.y.z. For example, 192.168.1.1 becomes ::ffff:192.168.1.1.

Question 3

How do IPv6 subnets work?

Accepted Answer

IPv6 subnets use CIDR notation (e.g., /64). The prefix length determines the network portion. A /64 is the standard subnet size for LANs, giving 2^64 addresses per subnet.

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