名词解释题HMAC的原理
名词解释题
HMAC的原理
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根据网络拓扑和R1的配置，解释并完成路由器R3的部分配置。 R3(config)ctypto isakmp key(7)address(8)R3(config)crypto transform-set testvpn ah—rod5—hmac esp-des esp-rod5-hmac(9)R3(cfg—crypto—ttans)exitR3(config)crypto map test 20 ipsec-isakmpR3(config—crypto—map)set peer 192．168．1．1R3(config—crypto—map)set transform-seI(10)
Which IS－IS authentication method is supported on the ERX Edge Router?() A. simple passwordB. HMAC message digest 5C. Password Authentication ProtocolD. Challenge Handshake Authentication Protocol
Refertotheexhibit.TheLinksysrouterinthediagramisperformingpNAT(portnetworkaddresstranslation).Whathashalgorithmshouldyouchooseandwhy?() A.UsehashMD5toensurethatIKEworksthroughNAT.B.Useah-sha-hmac,asitdoesnotchecktheintegrityoftheIPheader.TheIPheaderwillchangeduetoNAT.C.Use3DES,asitwillencrypttheIPSecheaderIPaddressesandbypassaddressingissues.D.Useesp-sha-hmac,asitdoesnotchecktheintegrityoftheIPheader.TheIPheaderwillchangeduetoNAT.
WhichofthefollowingistheencryptionalgorithmusedforprivoptionwhenusingSNMPv3?() A.HMAC-SHAB.HMAC-MD5C.CBC-DESD.AESE.3DES
Which two data intergrity algorithms are commonly used in VPN solutions?() A.HMAC-MD5B.RSAC.HMAC-SHA-1D.DH1E.DH2
Which IS-IS authentication method is supported on the ERX Edge Router?（）A、simple passwordB、HMAC message digest 5C、Password Authentication ProtocolD、Challenge Handshake Authentication Protocol
SNMPv3 authorizes management operations only by configured users and encrypts SNMP messages. Which authentication protocols does Cisco NX-OS Software use for SNMPv3？（）A、 NMAC-SHA-96 authentication protocolB、 HMAC-MD5-96 authentication protocolC、 Community String Match protocolD、 NMAC-MD5-96 authentication protocolE、 HMAC-SHA-96 authentication protocol
Which two data intergrity algorithms are commonly used in VPN solutions?（）A、HMAC-MD5B、RSAC、HMAC-SHA-1D、DH1E、DH2
Which of the following statements are true？ （）A、 RC4 is a stream cipherB、 Stream ciphers require paddingC、 AES is a block cipherD、 DES and 3DES are stream ciphersE、 AES is a stream cipherF、 AES， DES， and 3DES can be used as HMAC algorithms
多选题Which of the following statements are true？ （）ARC4 is a stream cipherBStream ciphers require paddingCAES is a block cipherDDES and 3DES are stream ciphersEAES is a stream cipherFAES， DES， and 3DES can be used as HMAC algorithms
判断题基于Hash函数的HMAC方法可以用于数据完整性校验A对B错