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

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Explanation

IPv6 Address Types - Drag and Drop Explanation

The question maps each address to its IPv6 address type. The descriptions (not shown) almost certainly read:

Item-by-Item Breakdown

1. 2001:DB8::bced:1234:456d:aacc -> Global Unicast

• Prefix 2000::/3 (first hex digit 2 or 3) = Global Unicast.
• 2001:DB8::/32 is specifically the documentation/example sub-range (RFC 3849), but it is still a Global Unicast address type.
• Global Unicast = publicly routable, the IPv6 equivalent of a public IPv4 address.
• Common mistake: Students think 2001:DB8 is a special "documentation-only" type. It is not a separate type - it is just a reserved sub-block within Global Unicast.

2. FD00:0000:0000:1a2d:a153:3992:a19d:ccca -> Unique Local

• Prefix FC00::/7 covers FC and FD. The FD prefix means the local bit (L-bit) is set, making it a locally assigned Unique Local Address.
• Unique Local = private, non-routable on the public internet. IPv6 equivalent of RFC 1918 (10.x, 192.168.x).
• Common mistake: Confusing Unique Local (FD) with Link-Local (FE80). Both are private, but Link-Local is link-scoped only (single segment), while Unique Local is site-scoped and can be routed within an organization.

3. FE80::abcd:ffff:12de:3992 -> Link-Local

• Prefix FE80::/10 always identifies a Link-Local address.
• Automatically configured on every IPv6 interface. Never routed beyond the local network segment.
• Used for neighbor discovery (NDP), router advertisements, and default gateway communication.
• Common mistake: Thinking Link-Local and Unique Local are the same. They are not - Link-Local (FE80) cannot leave the link; Unique Local (FC/FD) can be internally routed.

4. FF05::23:becf:22:1111 -> Multicast

• Any address starting with FF is Multicast.
• The second octet encodes the scope: FF05 = site-local scope.
• Multicast replaces IPv4 broadcast - packets are sent to a group of interested listeners, not all hosts.
• Common mistake: Confusing FF02 (link-local multicast) with FF05 (site-local multicast). Both are multicast - the scope digit (02 vs 05) changes how far the packet travels, not the type.

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