NGN: Next Generation Networks Quiz

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EnthusiasticHoneysuckle
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30 Questions

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

H.323 is monolithic while SIP is modular.

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

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

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

H.323

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

Binary

Which protocol provides instant messaging facility along with call routing?

SIP

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.

What is the transport protocol suitable for VOIP traffic?

UDP

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

Variability in packet arrival times

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

RTP

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

Isolating service layer from transport layer

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

Live IPTV (simulcasting)

Which OSI layer does the SIP protocol belong to?

Application Layer

What does DSL stand for in the context provided?

Digital Subscriber Loop

What is the purpose of DSL according to the text?

For high-speed Internet connection

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

Because it has different speeds for uploading and downloading data

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

Plain Old Telephone Service

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

Internal Splitter

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

Up to 8 Mbps

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.

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

Packet-based network

What is a defining characteristic of Next Generation Core Networks?

High upload speeds compared to basic broadband networks

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

Quality of Service

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

Packet-based architecture

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.

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

8,000 square km

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

Non-line-of-sight service

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

2 - 11 GHz

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

Fiber to the Home/ House

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

100 megabits per second

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

Delivery over optical fiber

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

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.

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