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Prezentacja programu PowerPoint
Prezentacja programu PowerPoint

... • Reordering is there and will stay there (race for faster interfaces...) • You will not be informed about it unless you ask • Old applications are most probably vulnerable to reordering • New applications should use reordering-resistant protocols • Even slow (in macroscopic scale) applications can ...
Network Virtualization for QoS-Aware Resource Management
Network Virtualization for QoS-Aware Resource Management

... to transfer multiple separate traffic flows over a shared link (physical or emulated), in such a way that each traffic flow appears to be using a dedicated link referred to as virtual link. The IETF developed the Integrated Services approach (IntServ) [12] to provide guaranteed bandwidth to individu ...
Chapter 1 – Introduction to Networking
Chapter 1 – Introduction to Networking

... A physical connection is made by connecting a specialized expansion card such as a modem or a network interface card (NIC) from a computer (PC) to a network. The logical connection uses standards called protocols. The application that interprets the data and displays the information in an understand ...
doc - Andrew.cmu.edu
doc - Andrew.cmu.edu

... 9. Please distinguish between I split horizon and poison reverse. Each is used to address the countto-infinity problem – but do they have any relative drawbacks? If so, please explain. ...
Selecting Vertical Handover Candidates in IEEE 802.11 Mesh Networks
Selecting Vertical Handover Candidates in IEEE 802.11 Mesh Networks

... be expanded by multiple heterogeneous access technologies such as UMTS and WiMax. These technologies differ greatly regarding medium access scheme, network capacity, QoS support, choice of data rates, and other various parameters such as power consumption and AAA aspects. Even though current researc ...
Week 01 Lecture
Week 01 Lecture

... line overhead. ------------------------------------------15. Which overhead bytes compensate for timing variations. ---------- ---------- ----16. The C1 value for the 7th STS-1 signal in an STS 12 frame would be -----------------. 17. List three types of commercially available SONET equipment. ----- ...
What is a communication network?
What is a communication network?

... Statistical multiplexer allows a line to carry frames that contain messages to/from multiple terminals Frames are buffered at multiplexer until line becomes available, i.e. store-and-forward ...
Chapter 1 Communication Networks and Services
Chapter 1 Communication Networks and Services

... everywhere. ...
Local-Area Networks
Local-Area Networks

... ARCnet was introduced by Datapoint Corporation in 1977. It uses a token-ring architecture, supports data rates of 2.5 Mbps, and connects up to 255 computers. ...
Chapter 1 - UniMAP Portal
Chapter 1 - UniMAP Portal

... Statistical multiplexer allows a line to carry frames that contain messages to/from multiple terminals Frames are buffered at multiplexer until line becomes available, i.e. store-and-forward ...
Document
Document

... – Only video session VS2 was marked as being eligible for receiving FEC protection – Identical video fragment streamed over both sessions to allow meaningful comparison – NIProxy video transcoding service also loaded • To address bandwidth shortage on the access network ...
Traffic Measurements for Link Dimensioning
Traffic Measurements for Link Dimensioning

... be monitored to the port to which the measurement device is connected. This switch, like all network devices, contains buffers to temporarily store packets that cannot be transmitted immediately. The switch that was used for our case studies was able to buffer frames for some tens of milliseconds. Sin ...
ppt - Rob Sherwood
ppt - Rob Sherwood

... A network slice is a collection of sliced switches/routers ...
the document
the document

... • The S6700 supports DHCP snooping, which discards invalid packets that do not match any binding entries, such as ARP spoofing packets and IP spoofing packets. This prevents hackers from using ARP packets to initiate attacks on campus networks. The interface connected to a DHCP server can be configured ...
BCS THE CHARTERED INSTITUTE FOR IT COMPUTER NETWORKS  BCS HIGHER EDUCATION QUALIFICATIONS
BCS THE CHARTERED INSTITUTE FOR IT COMPUTER NETWORKS BCS HIGHER EDUCATION QUALIFICATIONS

... transmitted using Manchester encoding. (4 marks) ...
Network Reference Model
Network Reference Model

... support data streams for which no minimum service level is required and therefore may be handled on a space-available basis. ...
SYNCHRONY®
SYNCHRONY®

... SYNCHRONY ST systems to support their operations with a dependable, controllable and flexible communication solution. ...
01_423intro
01_423intro

... Establishing, managing and termination connections (sessions~dialoques) between cooperating applications Reliable, transparent data transfer for lower level data segments or blocks(end-to-end flow & error cntr) Routing & switching service for transport layer. Layer of routers. Sends data blocks with ...
Overview of VoIP - ITU
Overview of VoIP - ITU

... The number of IP Centrex lines should grow from 13,000 in 2001 to 10 million in 2008. The number of standard Centrex lines in 2001 was estimated at 16,5 million. * ...
Fitting Voice Into Your Network
Fitting Voice Into Your Network

... network delays and equipment impairments. R-value converted to MOS  Benefit: Uses network statistics; voice quality score can be correlated to actual network performance  Used for both service assurance and network management, not as well-suited for service assurance  Primarily a transmission-pla ...
William Stallings Data and Computer Communications
William Stallings Data and Computer Communications

... Networking What are the differences? Communication - focuses on the transmission of data from one end, called the source, to another end, called the destination. Networking - focuses on the issues involved when connecting more communication hosts together and becoming a network. ...
Emerging Internet Technologies
Emerging Internet Technologies

...  Delivers with high assurance (a weaker guarantee)  Consists of 4 classes and 3 drop precedence levels  In-order delivery within each class  Drop precedence defined at the source end ...
Data Communication & Networking
Data Communication & Networking

...  Both stations can transmit and receive simultaneously. ( telephone network)  Like two way street with traffic flowing in both directions at the same time  Signals going in either direction share the capacity of the link in two ways:  Either the link must contain two physically separate transmis ...
The Link Layer
The Link Layer

... • All parity bits are calculated like this: binary addition of the message bits they check, with no carry • Possible to detect single-bit and double-bit errors • Possible to recover from single-bit errors • See Hamming lecture (will be linked on calendar) for more details ...
From Medical and Wearables to Big Data: Differentiated IP
From Medical and Wearables to Big Data: Differentiated IP

... for embedded medical devices. We see that Bluetooth-enabled devices have similar criteria, however the device is often in standby and listening for an activation signal to turn the device to functional mode. The circuitry that is always “on” listening and activating the device into functional mode i ...
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Quality of service

Quality of service (QoS) is the overall performance of a telephony or computer network, particularly the performance seen by the users of the network.To quantitatively measure quality of service, several related aspects of the network service are often considered, such as error rates, bit rate, throughput, transmission delay, availability, jitter, etc.Quality of service is particularly important for the transport of traffic with special requirements. In particular, much technology has been developed to allow computer networks to become as useful as telephone networks for audio conversations, as well as supporting new applications with even stricter service demands.
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