Cisco CCNA / CCNP Certification Tutorial: Frame Relay End-To-End Keepalives
One of the first things you learned about Frame is that the LMI also serves as a keepalive- or a heartbeat - and if three consecutive LMIs are missed- the line protocol goes down. There/' s a limitation to LMI as a keepalive- though. The LMI is exchanged only between the DTE and the closest DCE....
* What does certified mean? There are four accepted meanings of the adjective “certified” but only two of which satisfy the needed meaning. To be certified means to be endorsed with authority by an institution or a person with higher position after one successfully meets certain requirements. Anot...
CCNA stands for Cisco Certified Network Associate - a certification for IT professionals that is issued by Cisco Systems- Inc.- one of the most successful computer networking companies. Cisco manufactures and markets a wide range of devices for both enterprises and telecommunications carriers. Ci...
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