Telecommunications Voice over IP (VoIP) 2

Question 1

What is a PBX in the context of business telephony?

Accepted Answer

Private Branch Exchange

Answer

Public Broadband Exchange

Answer

Primary Backbone Extension

Answer

Protocol Buffer Extender

Question 2

What is E.164 number formatting used for?

Accepted Answer

Standardizing international telephone numbers

Answer

Encoding voice codec parameters

Answer

Defining SIP URI structure

Answer

Configuring QoS policies

Question 3

Which transport protocol does SIP most commonly use?

Accepted Answer

UDP or TCP

Answer

TCP only

Answer

UDP only

Answer

SCTP only

Question 4

What does PSTN stand for?

Accepted Answer

Public Switched Telephone Network

Answer

Private Switched Telephone Network

Answer

Protocol Standard Telecom Node

Answer

Primary Session Transfer Network

Question 5

What is G.729 commonly used for in VoIP?

Accepted Answer

Low-bandwidth compressed voice at 8 kbps

Answer

High-definition wideband audio

Answer

Video conferencing signaling

Answer

Fax over IP transmission

Question 6

What is the function of a VoIP gateway?

Accepted Answer

Convert between VoIP and PSTN/analog signals

Answer

Manage SIP user registrations

Answer

Assign extensions to IP phones

Answer

Monitor call quality metrics