求求CISCO高手帮我解释下

shuaiwei588

　　我2960的交换机  里面有段内容  在下才疏学浅 始终无法看懂   希望哪位大侠帮忙解释下    将感激不尽 ！！1
　　内容如下：
　　ip subnet-zero
!!!crypto pki trustpoint TP-self-signed-2790161920 enrollment selfsigned subject-name cn=IOS-Self-Signed-Certificate-2790161920 revocation-check none rsakeypair TP-self-signed-2790161920!!crypto pki certificate chain TP-self-signed-2790161920 certificate self-signed 01  3082023F 308201A8 A0030201 02020101 300D0609 2A864886 F70D0101 04050030   31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274   69666963 6174652D 32373930 31363139 3230301E 170D3933 30333031 30303030   35355A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649   4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D32 37393031   36313932 3030819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281   8100A283 2B32B352 4B718E0F 4A462124 A98A672A 32CC4F39 799113A0 59517672   766703CB 9B49BE97 F473919B 2B0E943C 62A84124 5D25950F A2AB9FCC B42D18F6   F8B77344 D774553C 5A1191DE 62ABA39D 22069706 1C67CD4F E296ADAD EF1DC5F5   66A66411 9646E00A 7BF6EBBC C2C80158 D9487F3A 3051120D C442DCBE D662980A   E2E70203 010001A3 67306530 0F060355 1D130101 FF040530 030101FF 30120603   551D1104 0B300982 07537769 7463682E 301F0603 551D2304 18301680 14C59838   A706E8F0 58DB5467 B4C5C9C9 2F2B43A8 22301D06 03551D0E 04160414 C59838A7   06E8F058 DB5467B4 C5C9C92F 2B43A822 300D0609 2A864886 F70D0101 04050003   81810009 C157D34A 4A86B90F DD029D4D C819081B 7AE11F20 1595B9A4 B6B5291B   4A91BBAE 754928C5 4C9247A9 6435DC60 044D439B C1BE968E 89E4B0C3 967875E1   37E1E980 4FFA834C E1E924D4 512C5471 5C15A26A DC8AD2CE 1EB94521 594D2F7A   9653C2C5 0C82F242 376E6CA4 176E2DFA 5FAE85AB BF941007 2184DCC9 B425A6CE AFC053  quit!