Such heavyweight players as Microsoft, IBM, Siemens, and Cisco Systems view ________ as a protocol that can deliver real-time communications for IP-based voice, video, data, and instant messaging.
A) SAP
B) SIP
C) PSA
D) PSI
Question 2
To establish a T-1 connection, each end of a digital leased line requires which two devices that are usually combined into one unit?
A) a leased unit and an owned unit
B) a private service unit and a public service unit
C) a channel service unit and a data service unit
D) a digital unit and an analog unit