Cisco Ccna Ccnp Certification Exam Tutorial Configuring Ppp Callback

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You may run into situations where a router in a remote location needs to dial in to a central router, but the toll charges are much higher if the remote router makes the call. This scenario is perfect for PPP Callback, where the callback client places a call to a callback server, authentication takes place, […]


Cisco Ccna Ccnp Certification Exam Tutorial Floating Static Routes

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To pass the Cisco CCNA and CCNP certification exams, as well as becoming a world-class networker, you’ve got to know how and when to use floating static routes. And if you’re wondering what makes them “float” — read on! In this example, R1 and R2 are running OSPF over a Frame Relay network, 172.12.123.0 /24. […]


Cisco Ccna Ccnp Exam Tutorial Testing Isdn Links Without Pings

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To earn your Cisco CCNA and CCNP certifications, you’ve got to master ISDN – and despite what some people say, there’s still a lot of ISDN out there that needs to be supported. And when it comes to troubleshooting ISDN, there’s a lot to look at. Is the correct ISDN switchtype configured? Are the dialer […]