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30.11 Example Encoded SNMP Message The encoded form of ASN.1 uses variable-length fields to represent items. In general, each field begins with a head 阅读全文
posted @ 2016-02-14 19:30
klchang
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30.9 Simple Network Management Protocol Network management protocols specify communication between the network management client program a manager inv 阅读全文
posted @ 2016-02-14 19:29
klchang
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30.10 SNMP Message Format Unlike most TCP/IP protocols, SNMP messages do not have fixed fields. Instead, they use the standard ASN.1 encoding. Thus, a 阅读全文
posted @ 2016-02-14 19:29
klchang
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30.8 Structure And Representation Of MIB Object Names We said that ASN.1 specifies how to represent both data items and names. However, understanding 阅读全文
posted @ 2016-02-14 19:28
klchang
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30.7 Formal Definitions Using ASN.1 The SMI standard specifies that all MIB variables must be defined and referenced using ISO's Abstract Syntax Notat 阅读全文
posted @ 2016-02-14 19:28
klchang
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30.6 The Structure Of Management Information In addition to the standards that specify MIB variables and their meanings, a separate standard specifies 阅读全文
posted @ 2016-02-14 19:27
klchang
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30.5 Examples of MIB Variables Versions 1 and 2 of SNMP each collected variables together in a single large MIB, with the entire set documented in a s 阅读全文
posted @ 2016-02-14 19:26
klchang
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30.4 Protocol Framework TCP/IP network management protocols2 divide the management problem into two parts and specify separate standards for each part 阅读全文
posted @ 2016-02-14 19:25
klchang
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30.3 Architectural Model Despite the potential disadvantages, having TCP/IP management software operate at the application level has worked well in pr 阅读全文
posted @ 2016-02-14 19:23
klchang
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30.2 The Level Of Management Protocols Originally, many wide area networks included management protocols as part of their link level protocols. If a p 阅读全文
posted @ 2016-02-14 19:21
klchang
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