RouterA and RouterB are connected by serial interface.The configuration of router A is as below: [Quidway1]display current-configurtion Now create configuration... Current configuration ! version…

RouterA and RouterB are connected by serial interface.The configuration of router A is as below:

[Quidway1]display current-configurtion Now create configuration... Current configuration ! version 1.74 local-user huawei service-type ppp password simple quidway firewall enable sysname Quidway1 ! interface Aux0 async mode flow phy-mru 0 link-protocol ppp ! interface Ethernet0 ip address 1.1.1.1 255.0.0.0 ! interface Serial0 clock DTECLK1 link-protocol ppp ppp authentication-mode chap ppp chap user hw ip address 2.1.1.1 255.0.0.0 ! interface Serial1 link-protocol ppp ! quit ip route-static 0.0.0.0.0.0.0.0 2.1.1.2 preference 60 ! return The configuration of router B is as below:

[Quidway2] display current-configurtion Now create configuration... Current configuration ! version 1.74 locatl-user hw service-type ppp password simple quidway firewall enable sysname Quidway2 encrypt-card fast-switch ! interface Aux0 async mode flow phy-mru 0 link-protocol ppp ! interface Ethernet0 ip address 3.1.1.1 255.255.0.0.0 ! interface Serial0 link-protocol ppp ppp chap user huawei ppp chap password simple quidway ip address 2.1.1.2 255.0.0.0 ! interface Serial1 link-protocol ppp ! quit ip routes-static 0.0.0.0.0.0.0.0 2.1.1.1 preference 60 ! return WAN stands for serial link between RouterA serial interface and RouterB serial interface. LAN stands for the link between RouterA Ethernet interface and RouterB Ethernet interface. Which of the following statements is true()