I am reading the SANS security policy--[password policy].I want to translate the [password policy] to Chinese.But I don`t understand a paragraph of the[password policy].

It is :"Where SNMP is used, the community strings must be defined as something other than the standard defaults of "public," "private" and "system" and must be different from the passwords used to log in interactively. A keyed hash must be used where available (e.g., SNMPv2)."

Can you explain it using simple word?thank you for a lot