200-301 Question #1476: Real Exam Question with Answer & Explanation

Question

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

Explanation

IPv6 Address Type Classification

The question asks you to match each IPv6 address to its address type. The four types (implied by the arrangement) are:

Item-by-Item Breakdown

1. 2000:e2a1:a1ee:03ed:39ad:4f6e:9f02:1 → Global Unicast

• Starts with 2000 — falls within the 2000::/3 prefix (first 3 bits = 001)
• These are publicly routable addresses, equivalent to public IPv4 addresses
• All Global Unicast addresses start with 2 or 3

2. fe80::efae:0b2a:56fe:4a87:147f:dc21:7 → Link-Local

• Starts with fe80 — falls within fe80::/10
• Valid range: fe80:: through febf:: (though fe80 is the only prefix used in practice)
• Automatically assigned on every IPv6 interface; not routable beyond the local network segment
• The :: compression is a clue — link-local addresses often have long zero runs

3. fc00:733d:b542:a948:d7fa:ecea:989a:3 → Unique Local

• Starts with fc — falls within fc00::/7 (covers fc00:: to fdff::)
• Equivalent to RFC 1918 private addresses (10.x, 172.16.x, 192.168.x) in IPv4
• Routable within an organization but not on the public internet
• Common mistake: confusing fc00::/7 with fe80::/10 (link-local) — they're different ranges

4. ff00:3b64:fbca:171a:6140:6a35:1ea6:12 → Multicast

• Starts with ff — falls within ff00::/8
• All IPv6 multicast addresses begin with ff; there is no broadcast in IPv6 — multicast replaces it
• Common mistake: IPv6 has no broadcast — ff is always multicast, never broadcast

Common Mistakes

• Confusing Link-Local (fe80) and Unique Local (fc/fd): Both are non-routable externally, but they serve different purposes. Link-local is per-link only; unique local works across an organization's internal network.
• Forgetting 2 and 3 are both Global Unicast: The 2000::/3 block includes addresses starting with 2 or 3.
• Assuming ff means broadcast: IPv6 eliminated broadcast entirely — ff is always multicast.

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