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
下列关于PPP协议会话的过程,说法正确的是()?
A. 当物理层可用时,进入Dead阶段
B. 在Authenticate阶段,仅支持链路控制协议,认证协议和质量检查数据报文,其他数据报文都被丢弃。
C. 每当一次会话结束,PPP链路就会自动关闭
D. 当PPP协议正在传输报文时,不会被任何其它中断
[R3-luser-nrtwork-R2]service-type ppp 这条命令的意思是()?
A. 用户类型为PPP用户
B. 开启PPP认证
C. 本端用户名为PPP
D. 本端为主验证方
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