Which of the following VoIP protocols is an emerging standard for PSTN gateway control?

How many bits are there in a MAC address?

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

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

Functions of a voice gateway?

RTP (Real-time Transport Protocol) requests retransmission if a voice packet is lost.

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

Types of address signaling?

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

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

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?