Documentation/op-guide: Clarify TLS "--peer" flags
@@ -271,12 +271,12 @@ The security flags help to [build a secure etcd cluster][security].
+ env variable: ETCD_PEER_CA_FILE
### --peer-cert-file
-+ Path to the peer server TLS cert file.
++ Path to the peer server TLS cert file. This is the cert for peer-to-peer traffic, used both for server and client.
+ default: ""
+ env variable: ETCD_PEER_CERT_FILE
### --peer-key-file
-+ Path to the peer server TLS key file.
++ Path to the peer server TLS key file. This is the key for peer-to-peer traffic, used both for server and client.
+ default: ""
+ env variable: ETCD_PEER_KEY_FILE
