NGN: Next Generation Networks Quiz

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Questions and Answers

What is the primary difference between H.323 and SIP in terms of architecture?

Both H.323 and SIP are modular in architecture.

H.323 is modular while SIP is monolithic.

H.323 is monolithic while SIP is modular. (correct)

Both H.323 and SIP are monolithic in architecture.

How do H.323 and SIP differ in terms of interoperability?

Neither H.323 nor SIP provide interoperability.

SIP provides interoperability due to well-defined protocols, while H.323 does not.

Both H.323 and SIP provide interoperability due to their flexibility.

H.323 provides interoperability due to well-defined protocols, while SIP does not. (correct)

Which protocol requires a license to use due to compression capabilities?

H.323 (correct)

Neither

Both

SIP

What type of message format is used by H.323?

Binary Signup and view all the answers

Which protocol provides instant messaging facility along with call routing?

SIP Signup and view all the answers

In terms of ease of implementation, why is SIP considered more advantageous than H.323?

SIP's reusable elements simplify implementation compared to the need for special parsers in H.323. Signup and view all the answers

What is the transport protocol suitable for VOIP traffic?

UDP Signup and view all the answers

What does jitter refer to in the context of Next Generation Networks?

Variability in packet arrival times Signup and view all the answers

Which protocol is commonly used for streaming video in IPTV services?

RTP Signup and view all the answers

In NGN networks, what is the main focus of the 'service' concept?

Isolating service layer from transport layer Signup and view all the answers

What type of IPTV involves broadcasting live programs over an internet connection?

Live IPTV (simulcasting) Signup and view all the answers

Which OSI layer does the SIP protocol belong to?

Application Layer Signup and view all the answers

What does DSL stand for in the context provided?

Digital Subscriber Loop Signup and view all the answers

What is the purpose of DSL according to the text?

For high-speed Internet connection Signup and view all the answers

Why is ADSL called asymmetric according to Dr. Subodha Gunawardena?

Because it has different speeds for uploading and downloading data Signup and view all the answers

What does POTS stand for in the context of DSL technology?

Plain Old Telephone Service Signup and view all the answers

What technology is used at the user's end in a DSL network to separate POTS from computer signals?

Internal Splitter Signup and view all the answers

According to ITU-T Rec.G.992.1, what is the maximum download speed for SDSL?

Up to 8 Mbps Signup and view all the answers

What is a key difference between the usage of '4G' in the market and the actual 4G standard?

The market version of 4G is just a marketing term and slightly better than 3G. Signup and view all the answers

Which feature of NGN (Next Generation Networks) allows them to provide telecommunications services independently from underlying transport technologies?

Packet-based network Signup and view all the answers

What is a defining characteristic of Next Generation Core Networks?

High upload speeds compared to basic broadband networks Signup and view all the answers

In the context of NGN, what does QoS stand for?

Quality of Service Signup and view all the answers

What is a key aspect of Architectural evolution and innovation in telecommunication and access networking as per NGN?

Packet-based architecture Signup and view all the answers

Which statement best describes the usage of IP-based protocols in 4G networks?

IP-based protocols are used for both data and voice transmission in 4G. Signup and view all the answers

What is the coverage area that a single WiMAX tower can provide?

8,000 square km Signup and view all the answers

What type of service does a smaller (indoor) antenna in WiMAX provide?

Non-line-of-sight service Signup and view all the answers

What is the frequency range for the non-line-of-sight service in WiMAX?

2 - 11 GHz Signup and view all the answers

In FTTH technology, what does 'FTTH' stand for?

Fiber to the Home/ House Signup and view all the answers

What is the maximum transmission speed that can be achieved with FTTH technology?

100 megabits per second Signup and view all the answers

What is a common characteristic of AON and PON in Optical Networks?

Delivery over optical fiber Signup and view all the answers

Study Notes

H.323 vs SIP

H.323 is a more complex protocol with a centralised architecture, whereas SIP has a decentralised architecture
H.323 requires a Gatekeeper for authentication and address resolution, whereas SIP uses DNS or redirect servers for address resolution
SIP provides better interoperability due to its simplicity and flexibility

Protocols and Messages

H.323 uses ASN.1 (Abstract Syntax Notation One) message format
SIP provides instant messaging facility along with call routing
SIP is considered more advantageous than H.323 in terms of ease of implementation due to its simplicity and flexibility

VOIP and IPTV

RTP (Real-time Transport Protocol) is a suitable transport protocol for VOIP traffic
SIP is commonly used for streaming video in IPTV services
In NGN networks, the main focus of the 'service' concept is to provide services independently from underlying transport technologies
Live IPTV involves broadcasting live programs over an internet connection

Network Fundamentals

SIP belongs to the application layer (Layer 7) of the OSI model
DSL stands for Digital Subscriber Line, which is a technology for broadband internet access
The purpose of DSL is to provide high-speed internet access over existing copper telephone lines
ADSL (Asymmetric DSL) is called asymmetric because the download speed is much faster than the upload speed
POTS stands for Plain Old Telephone Service
A splitter is used at the user's end in a DSL network to separate POTS from computer signals
According to ITU-T Rec.G.992.1, the maximum download speed for SDSL (Symmetric DSL) is 1.544 Mbps

Next Generation Networks (NGN)

NGN allows telecommunications services to be provided independently from underlying transport technologies
A defining characteristic of Next Generation Core Networks is the separation of transport and service layers
In the context of NGN, QoS stands for Quality of Service
A key aspect of Architectural evolution and innovation in telecommunication and access networking is the convergence of fixed and mobile networks

4G and WiMAX

A key difference between the usage of '4G' in the market and the actual 4G standard is the download speed, which should be at least 1 Gbps
IP-based protocols are used in 4G networks to provide high-speed data services
A single WiMAX tower can provide a coverage area of up to 3,000 square miles
A smaller (indoor) antenna in WiMAX provides Line-of-Sight (LOS) service
The frequency range for the non-line-of-sight service in WiMAX is 2-6 GHz

FTTH

FTTH stands for Fiber to the Home
The maximum transmission speed that can be achieved with FTTH technology is up to 10 Gbps
A common characteristic of AON (Active Optical Network) and PON (Passive Optical Network) in Optical Networks is the use of fiber optic cables

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Description

Test your knowledge on NGN (Next Generation Networks) principles, including VoIP, H.323, and SIP protocols. Explore the differences between H.323 and SIP related to origins, endpoint location, and call routing.