OSI中数据链路层的默认协议是什么
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数据链路层协议有：Frame Relay，HDLC，PPP， IEEE 802.3/802.2，华三默认是PPP
- 2022-10-09回答
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有验证方式（pap、chap）吗
可以选择PAP或者CHAP认证，PAP单向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode pap # [RTB]inter s1/0 [RTB-Serial1/0]ppp pap local-user rtb password simple 123 # PAP双向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode pap [RTA-Serial1/0]ppp pap local-user rta password simple 456 # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 456 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp authentication-mode pap [RTB-Serial1/0]ppp pap local-user rtb password simple 123 # CHAP: CHAP1单向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap [RTA-Serial1/0]ppp chap user rta # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 123 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp chap user rtb # CHAP2单向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap # [RTB-Serial1/0]ppp chap user rtb [RTB-Serial1/0]ppp chap password simple 123 # CHAP1双向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap [RTA-Serial1/0]ppp chap user rta # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 123 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp authentication-mode chap [RTB-Serial1/0]ppp chap user rtb # 备注：密码必须保持一致。 CHAP2双向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap [RTA-Serial1/0]ppp chap user rta [RTA-Serial1/0]ppp chap password simple 456 # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 456 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp authentication-mode chap [RTB-Serial1/0]ppp chap user rtb [RTB-Serial1/0]ppp chap password simple 123 # 备注：密码不需要保持一致。
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可以选择PAP或者CHAP认证，PAP单向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode pap # [RTB]inter s1/0 [RTB-Serial1/0]ppp pap local-user rtb password simple 123 # PAP双向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode pap [RTA-Serial1/0]ppp pap local-user rta password simple 456 # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 456 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp authentication-mode pap [RTB-Serial1/0]ppp pap local-user rtb password simple 123 # CHAP: CHAP1单向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap [RTA-Serial1/0]ppp chap user rta # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 123 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp chap user rtb # CHAP2单向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap # [RTB-Serial1/0]ppp chap user rtb [RTB-Serial1/0]ppp chap password simple 123 # CHAP1双向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap [RTA-Serial1/0]ppp chap user rta # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 123 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp authentication-mode chap [RTB-Serial1/0]ppp chap user rtb # 备注：密码必须保持一致。 CHAP2双向： 拓扑图： # [RTA]local-user rtb class network [RTA-luser-network-rtb]password simple 123 [RTA-luser-network-rtb]service-type ppp [RTA-Serial1/0]ppp authentication-mode chap [RTA-Serial1/0]ppp chap user rta [RTA-Serial1/0]ppp chap password simple 456 # [RTB]local-user rta class network [RTB-luser-network-rta]password simple 456 [RTB-luser-network-rta]service-type ppp [RTB-Serial1/0]ppp authentication-mode chap [RTB-Serial1/0]ppp chap user rtb [RTB-Serial1/0]ppp chap password simple 123 # 备注：密码不需要保持一致。