What are three reasons that an organization with multiple branch offices and roaming users might implement a Cisco VPN solution instead of point-to-point WAN links?
Which command is used to enable CHAP authentication, with PAP as the fallback method, on a serial interface?
Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?
How should the network administrator configure the serial interface of the main office router to make the connection?