According to the OSI model, which layer performs the function of transforming bits of data into electrical signals and sending those signals across the media?

How many bits are there in a Class B address in Net ID (Network portion) and Host ID (Host Portion) fields by default?

Which layer of the TCP/IP model ensures the quality and deliverability of VoIP packets?

Types of address signaling?

Which signaling protocol can be used with gateways over a VoIP network?

Which one is responsible for electrical echo on telephone networks?

Functions of a voice gateway?

Three elements of a security policy necessary for a VoIP network?

You have to use an H.323 proxy if the firewall does not support dynamic access control.

How many bits are there in a MAC address?

Which VoIP protocol is an emerging standard for PSTN gateway control?