Which protocol is an open standard protocol framework that is commonly used in VPNs, to provide secure end-to-end communications?
Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?
What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?
How should the network administrator configure the serial interface of the main office router to make the connection?
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?