Drag and Drop Question Drag and drop the IPv6 address from the left onto the type on the right. Answer:

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Explanation

IPv6 Address Type Classification

The question asks you to match each IPv6 address to its type based on its prefix - the first few bits/characters determine the address type. The type labels on the right (not shown in your question) are the standard IPv6 address categories.

The Key Rule: IPv6 Address Type is Determined by its Prefix

Item-by-Item Breakdown

Position 1: 2000:1092:a1e8:827d:527c:3ce7:9816:1 -> Global Unicast

• Starts with 2000, which falls in the 2000::/3 range (binary 001xxxxx...)
• Global unicast = routable on the public internet, analogous to a public IPv4 address
• Common mistake: confusing this with "public" IPv4 - the concept maps over, but the prefix range (2000:: to 3FFF::) is what defines it

Position 2: fe80:cc72:4b9e:445c:8179:0420:5988:7 -> Link-Local Unicast

• Starts with fe80, which is always in the FE80::/10 block
• Link-local addresses are non-routable - only valid on the local network segment
• Analogous to IPv4 APIPA (169.254.x.x)
• Common mistake: thinking fe80 addresses can be routed across the internet - they cannot

Position 3: ff00:ec5c:dbb1:3e8b:6d46:bd27:a236:12 -> Multicast

• Starts with ff, placing it firmly in FF00::/8
• Any address beginning with FF is multicast - sent to a group of interfaces, not one
• Common mistake: confusing multicast (FF::) with broadcast - IPv6 has no broadcast; multicast replaces it

Position 4: ff00:9860:653f:5146:8cb2:a27c:cbf3 -> Multicast

• Also starts with ff00 - same type as Position 3
• If the exam distinguishes these two, it's likely by scope (nibble 4 of the address: ff[flags][scope]::) - ff00 means scope=0 (reserved/node-local), while ff02 = link-local scope, ff0e = global scope

Common Misconceptions

• fe80 vs ff00: Link-local starts with fe8, multicast starts with ff - easy to mix up visually
• Two multicast addresses: Both ff00:ec5c... and ff00:9860... are multicast; if the exam expects different placements, look at the full second byte for scope differences
• No Loopback here: IPv6 loopback is ::1 (exactly) - none of these are loopback
• No Anycast: Anycast addresses share the same prefix space as global unicast and are distinguished only by configuration, not by address format alone

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