下列关于PAP和CHAP的区别说法正确的是()?
A. PAP支持双向身份认证,CHAP不支持双向认证
B. 因为PAP比CHAP的安全性高,所以应用更广泛
CHAP通过三次握手认证远端节点
D. CHAP认证只在网络上传输密码,PAP密码和用户名都发送
哪一条命令可以判断这个路由器PTA为主验证方()?
A. [RTA-Serial/0]ppp authentication-mode pap
B. [RTA-Serial1/0] link-protocol ppp
C. [RTA-Serial1/0] ppp pap local-user sxvtc password simple 654321
D. [RTB-Serial1/0] link-protocol ppp
R3和R2相连,在R3上配置chap双向认证,正确的是()?
A. [R3] local-user sxvtc class network[R3-luser-nrtwork-R2]password simple 654321[R3-luser-nrtwork-R2]service-type ppp[R3-luser-nrtwork-R2]quit[R3] int s1/0[R3-Serial1/0] link-protocol ppp[R3-Serial/0]ppp authentication-mode pap[R3-Serial1/0]quit
B.[R3] local-user sxvtc class network[R3-luser-nrtwork-R2]password simple 654321[R3-luser-nrtwork-R2]service-type ppp[R3-luser-nrtwork-R2]quit[R3] int s1/0[R3-Serial1/0] link-protocol ppp[R3-Serial/0]ppp authentication-mode chap[R3-Serial1/0]quit
C. [R3] local-user sxvtc class network[R3-luser-nrtwork-R2]password simple 654321[R3-luser-nrtwork-R2]service-type ppp[R3-luser-nrtwork-R2]quit[R3] int s1/0[R3-Serial1/0] ppp authentication-mode pap[R3-Serial/0]ppp chap user R3[R3-Serial1/0]quit
D. [R3] local-user sxvtc class network[R3-luser-nrtwork-R2]password simple 654321[R3-luser-nrtwork-R2]service-type ppp[R3-luser-nrtwork-R2]quit[R3] int s1/0[R3-Serial1/0] ppp authentication-mode chap[R3-Serial/0]ppp chap user R3[R3-Serial1/0]quit
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