VoIP - Voice Over IP Quiz # 1

What is the full form of 3DES?

Triple Decoding Encoding Standard

Triple Data Encryption Standard

Triple Data Encoding Standard

Triple Digital Encryption Service

What is the full form of BGP?

Border Gateway Protocol

Border Gateway Police

Border Global Position

Border Global Protocol

What is the full form of POTS?

Public Old Telephone Service

Plain Old Telephone Service

Plain Old Telecommunication System

Protocols Of Telecommunication System

What is the full form of L2TP?

Level 2 Technology Protocol

Level 2 Transmission Protocol

Layer 2 Transport Protocol

Layer 2 Tunneling Protocol

What are the functions of Call Control?

Call setup

Call maintenance

Call termination

All of the above

What is the full form of CCS?

Conditional Channel Signaling

Combined Channel Signaling

Common Channel Signaling

Collective Channel Signaling

What is the function of D (Data) channel in ISDN?

It is used for carrying data

It is used for carrying voice

It is used for carrying signaling information

All of the above

Which TCP port number is used by H.323 protocol for call setup?

5060

1720

1718

2727

What is the full form of DSL?

Digital Subscription Line

Digital Super Link

Digital Speed Line

Digital Subscriber Line

What is a soft phone?

It is a hardware phone especially made for VoIP

It is a software that works on a laptop, desktop or a pocket PC

It is the traditional phone that we use these days

None of the above

What is the full form of DPNSS?

Dedicated Private Network Signaling Services

Digital Public Network Signaling System

Dual Primary Network System Signaling

Digital Private Network Signaling System

Is it possible to transport fax and modem traffic over a VoIP network?

Yes

No

What is the full form of SS7?

Secure Signal 7

Secure System 7

Signaling System 7

Switch Signal 7

What is the full form of TDM?

Time Division Multiplexing

Telephone Domain Management

Transmission Division Multiplexing

Time Domain Multiplexing

Which protocol provides end-to-end delivery services for data that requires real-time support such as interactive voice and video?

Real-time Transport Protocol (RTP)

Resource Reservation Protocol (RSVP)

Compressed Real-time Transport Protocol (CRTP)

Real-time Transport Control Protocol (RTCP)

What is the full form of PSTN?

Public Switched Telephone Network

Packet Service of Telephone Network

Plain Switched Telephone Network

Public Subscriber Trunk Network

What is the length of IP v4 addresses (in bits)?

16 bits

32 bits

48 bits

64 bits

Which of the following is used by an exchange to convert analog audio to digitized audio?

SS7

PCM

ISDN

DSL

Which of the following signaling protocols is based on the ISDN Q.931 standard?

Q.933A

DPNSS

QSIG

SS7

Which of the following ITU standards delivers faxed documents as e-mail attachments over a VoIP netwok?

T.30

T.37

T.38

All of the above

How many voice conversations are possible on an E1 line simultaneously?

16

24

30

32

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?

Network

Data Link

Transport

Physical

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

Net ID=8 bits & Host ID=24 bits

Net ID=16 bits & Host ID=16 bits

Net ID=24 bits & Host ID=8 bits

None of the above

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

Application

Transport

Internetwork

Physical

Which of the following are types of address signaling?

TDM

Pulse dialing

DTMF

FDM

Which of the following signaling protocols can be used with gateways over a VoIP network?

SIP

H.264

H.323

MGCP

Which of the following is responsible for electrical echo on telephone networks?

Speakerphones

Impedance mismatch

Incorrect voltage

All of the above

Which of the following provide transport security by using encryption, data integrity and data authentication?

VPNs

Firewalls

Antivirus

IPSec

State whether true or false:

Stateful firewalls do not remember the previous traffic that has occurred earlier in the session

True 

False 

Which of the following is the most common trunk signal type used by E&M signaling?

Wink-start

Immediate-start

Delay-start

Loop-start