update

1 files changed, 2 insertions, 1 deletions

diff --git a/draft-schanzen-r5n.xml b/draft-schanzen-r5n.xml
index 148fb8d..e7630f5 100644
--- a/draft-schanzen-r5n.xml
+++ b/draft-schanzen-r5n.xml
@@ -2746,7 +2746,8 @@ ComputeOutDegree(REPL_LVL, HOPCOUNT, L2NSE):
               is a list of UTF-8 addresses (<xref target="terminology"/>)
               which can be used to contact the peer.
               Each address <bcp14>MUST</bcp14> be 0-terminated.
-              The set of addresses <bcp14>MAY</bcp14> be empty.
+              The set of addresses <bcp14>MAY</bcp14> be empty, for example
+              if the peer knows that it cannot be reached from the outside (i.e. NAT).
             </dd>
             <dt>SIGNATURE</dt>
             <dd>