Question E8C14:
What type of addresses do nodes have in a mesh network?  

Choices:  
A: Email  
B: Trust server  
C: Internet Protocol (IP)  
D: Talk group    

Correct Answer is  C: Internet Protocol (IP)  

In amateur radio mesh networks (e.g., AREDN/HSMM-MESH), each node is a networked device that routes data at OSI Layer 3. Nodes are identified and reached using Internet Protocol addresses.

Why C (Internet Protocol) is correct:
- Mesh nodes run IP networking and routing (e.g., OLSR/BATMAN), so each node has an IP address (typically IPv4 in dotted-decimal, sometimes IPv6).
- Services on a node are accessed by IP plus port, like $IP:port$.

Why the others are incorrect:
- A: Email — Email addresses identify mailboxes for messaging (SMTP/IMAP/POP), not network nodes.
- B: Trust server — Not an addressing scheme; a “trust server” is a security component, not how nodes are addressed.
- D: Talk group — Used in digital voice systems (e.g., DMR) as group IDs for voice channels, not for addressing data-network nodes.

Rules of thumb:
- If the question involves routing between “nodes” in a mesh, think Layer-3 addressing: IP.
- Services live at $IP:port$; names may be resolved by local DNS, but the underlying address is IP.