Dell Managed PDU LED - Manual (Page 166)

USER’S GUIDE
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SNMP
All user names, passwords, and community names for SNMP are transferred over the
network as plain text. If your network requires the high security of encryption, disable
SNMP access or set the access for each community to Read. (A community with Read
access can receive status information and use SNMP traps.)
For detailed information on enhancing and managing the security of your
system, see
Appendix B: Security Handbook .