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Compare between SNMP v1, SNMP v2 and SNMP v3.
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Cotent SNMPv1 SNMPv2 SNMPv3
Standards RFC-1155.1157.1212 RFC-1441,1452 RFC-1909.1910 RFC- 1901 to 1908 RFC-1902 to 1908,2271 to 2275
Version SNMPv1 was the first version of SNMP SNMPv2 currently exists in at least three flavors, SNMPv2c, SNMPv2u, and SNMPv2 SNMPv3 is the newest version of SNMP.
protocol operations Simple request/ response protocol. Protocol operations :Get, GetNext, Set, and Trap Similarity: Get, GetNext, Set Changes: Trap message format New protocol operations GetBulk and Inform SNMPv3 uses SNMPv2 protocol operations and its PDU message format
Security No security from someone with access to the network SNMPv2 failed to improve on security. Its primary feature is enhanced security.
Complexity Performance and security limitations. More powerful but more complex than SNMPv1 SNMPv3 focuses on improving the security aspect.
Message Format Five messages(GetRequest,,GetNextRequest, SetRequest, Trap, Response) Seven messages instead of five (inform-request, get-bulk-request) Implements SNMP v1 and v2 specifications along with proposed new features.
Protocol An open, standard protocol, Streamlined protocol Simple request/response protocol The "EngineID" Identifier in SNMPv3 uniquely identifies each SNMP entity.
MIB Defines limited, easily implemented MIB of scalar variables and two dimensional tables Defines general framework with which MIB defined and constructed Can configure agents to provide a number of levels of access to MIB
Plaintext community strings Yes Yes No
Encrypted traffic, Detection of malformed packets No Yes Yes
Susceptible to brute- force attacks, Susceptible to buffer-overflow attacks Yes Yes No
Susceptible to injection attacks Yes No No
Susceptible to replay attacks Yes No No
Susceptible to sniffing of session keys Yes No No
Default/known passwords Yes Yes No
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