cisco quality of service pdf

... significance of Quality of Service (QoS) ã Describe new Quality of Service (QoS) features in Cisco IOS 12.1 ã Explain which problems QoS solves The purpose of this module is to quickly survey the new Quality ... Inc. 1 â 2000, Cisco Systems, Inc. Introduction to Quality of Service Introduction to Quality of Service Copyright â 2000, Cisco Systems, Inc. 20 â 2000, Cisco Systems, Inc. www .cisco. com Econ_0385_02_010.ppt Keep ... Copyright â 2000, Cisco Systems, Inc. 18 â 2000, Cisco Systems, Inc. www .cisco. com Econ_0385_02_010.ppt Keep All Graphics Inside This Box IP-ATM Class of Service IP-ATM Class of Service Capabilities: ã...

Ngày tải lên: 11/12/2013, 14:15

... achieving QoS. © 2000, Cisco Systems, Inc. 1 © 2000, Cisco Systems, Inc. Campus Quality of Service © 2000, Cisco Systems, Inc. 17 © 2000, Cisco Systems, Inc. www .cisco. com econ_387_05_010.ppt Campus ... 802.1p field (referred to as class of service or CoS), which is part of the 802.1Q tag ã At Layer 3 using the 3 bits of DSCP field in the type of service (ToS) byte of the IP header Classification ... Define Differential Service Code Point The objective of this module is to define the quality of service (QoS) tools which must be implemented to provide a voice-enabled transport service for IP telephony. A...

Ngày tải lên: 11/12/2013, 14:15

... avoidance, additive increase 24.23 24-5 QUALITY OF SERVICE 24-5 QUALITY OF SERVICE Quality of service (QoS) is an internetworking issue Quality of service (QoS) is an internetworking issue ... SERVICES 24-7 INTEGRATED SERVICES Two models have been designed to provide quality of Two models have been designed to provide quality of service in the Internet: Integrated Services and service ... Four cases of congestion 24.2 24-1 DATA TRAFFIC 24-1 DATA TRAFFIC The main focus of congestion control and quality of The main focus of congestion control and quality of service is service is...

Ngày tải lên: 06/03/2014, 12:20

Ngày tải lên: 04/07/2014, 01:20

... number of bits per symbol of modulation. This number depends on the MCS used.  c: represents the code rate of the Forward Error Correction (FEC). VI Contents Part 2 Quality of Service ... the classification of the scheduling mechanisms provided in the Section Quality of Service and Resource Allocation in WiMAX 4 3. Then, the performance evaluation of these algorithms ... to present state of the art on WiMAX Technology. It has been constructed with the support of many researchers around the world, working on resource allocation, quality of service and WiMAX...

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 27/06/2014, 20:20

... eg. ToS field of IP o Problem l how to avoid everybody sendinghigh priority packets? Queue Management 1 Quality of Service in IP Networks CH-1015 Ecublens http://icawww.epfl.ch Prof. Jean-Yves ... Fast Retransmit o Probability p of choosing a given flow is proportional to the rate of the flow l more packets of that flow, higher probability of choosing one of its packets Queue Management 16 FIFO o ... duration o Burst duration - S sec o Size of the bucket - B bytes o Maximal departure rate - p bytes/s o Token arrival rate - r bytes /s l burst of B + r S bytes l burst of pS l B + rS = pS → S = B/(r -...

Ngày tải lên: 06/04/2013, 11:05

... that information instead of when a packet arrives. The 140 Chapter 9. Quality of Service Quality of service (QoS) is an often-used and misused term that has a variety of meanings. In this book, ... has a variety of meanings. In this book, QoS refers to both class of service (CoS) and type of service (ToS). The basic goal of CoS and ToS is to achieve the bandwidth and latency needed for ... classes of service. You can base policies on IP addresses, port numbers, protocols, or the size of packets. You can use one of these descriptors to create a simple policy, or you can use all of...

Ngày tải lên: 30/09/2013, 05:20

Ngày tải lên: 18/10/2013, 12:15

... or more of the total number of RF channels required on a multiple link transport system for a specified amount of user grade of service. The percentage reduction depended on the number of radiating ... 5 A N N! B= i i! i=0 N A ∑ Improving Grade of Service (GOS) While Reducing RF Channels Wireless service providers are adopting new deployment strategies to reduce network costs and improve quality of service. In one urban ... “grade of service (GOS), which is the acceptable amount of network blocking of incoming call attempts. Typical wireless network designs in the United States provision channels to provide voice services...

Ngày tải lên: 10/12/2013, 19:15

... Service Signaling Quality of Service Signaling â 2000, Cisco Systems, Inc. www .cisco. com econ_0386_09_001.ppt Copyright â 2000, Cisco Systems, Inc. 40 â 2000, Cisco Systems, Inc. www .cisco. com econ_0386_09_010.ppt Keep ... the service policy named gary. http://www .cisco. com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120xe/120xe5/mqc/mcli.htm Copyright â 2000, Cisco Systems, Inc. 44 Quality of Service Signaling Quality ... DiffServ. Note the similarity to the Cisco IOS software capabilities we are discussing. Copyright â 2000, Cisco Systems, Inc. 38 â 2000, Cisco Systems, Inc. www .cisco. com econ_0386_09_010.ppt Keep...

Ngày tải lên: 11/12/2013, 14:15

... DDOS - Distributed Denial Of Service. ã 1998 Chng trỡnh Trinoo Distributed Denial of Service (DDoS) được viết bởi Phifli. ã Thỏng 5 1999 Trang ch ca ... rõ những vụ tấn công từ chối dịch vụ (Denial Of Services Attack ) và những cuộc tấn công về việc gửi nhửng gói dữ liệu tới máy chủ (Flood Data Of Services Attack) tới tấp là những mối lo sợ cho ... chỉ IP khác nhau với nhửng yêu cầu chuyễn vận lên đến 1 gigabit /s. DDOS - Distributed Denial Of Service ? ã 8 -2 nhiều Web site lớn như Buy.com, Amazon.com, eBay, Datek, MSN, v CNN.com b tn...

Ngày tải lên: 26/12/2013, 00:16

... ance of Dr. Ruth Davis, Department of Defense, Mr. Richard See, Office of Science Information Services, National Science Foundation, and also of Dr. A. Hood Roberts, executive secretary of the ... their knowledge or lack of knowledge of science, however. All raters were native speakers of English. The screening of the raters in Part I of the experiment by means of SAT verbal scores was ... through the use of a given number of P-sentences se- lected from a given number of disparate samples from a given translation source, rated by a given number of EVALUATING THE QUALITY OF TRANSLATIONS...

Ngày tải lên: 19/02/2014, 19:20

... 105 5.9 References 106 6 Quality of service 107 6.1 Introduction 107 6.2 Routing in mobile ad hoc networks 110 6.3 Routing with quality of service constraints 112 6.4 Quality of service routing in ... independent. 1.5 Quality of service All the vulnerabilities enumerated in Section 1.3 above are potential sources of service impairment in ad hoc networks and hence may degrade the ‘ quality of service ’ ... associated with providing quality of service (QoS)in ad hoc networks. It should be pointed out that security and quality of service are two distinct attributes that are independent of each other in general....

Ngày tải lên: 25/03/2014, 12:07

... definition of health-related quality of life. HRQOL is defined as the perception of overall satisfaction with life and involves the measurement of functional sta- tus in the domains of physical, ... morning of the HFA was excluded from the database to avoid inaccurate prediction of metabolic equivalent (MET) capacity from the treadmill test. After review of the database 709 (62.9% of the ... Circulation 2007, 116:329-343. Health and Quality of Life Outcomes 2009, 7:47 http://www.hqlo.com/content/7/1/47 Page 2 of 5 (page number not for citation purposes) importance of better understanding the relation...

Ngày tải lên: 18/06/2014, 18:20

... health-related quality of life, the quality of sleep, and mood [22]. To sum up, the scheduled interventions which give feedback to the principal circadian clock during appropriate periods of the day ... associations of HRQoL with exposure to illumination and with seasonal changes in mood and behavior. To be specific, we aimed at elucida- tion of associations, if any, of the 15D Health-Related Quality of ... Dimen- sions Health-Related Quality of Life Instrument; GHQ: General Health Questionnaire; GSS: General Seasonality Score; HRQoL: Health Related Quality of Life; QoL: Qual- ity of Life; SPAQ: Seasonal...

Ngày tải lên: 18/06/2014, 19:20

... wider aspects of quality of life among adults with PAD: How do they manage their condition? Which factors are conducive to coping, good quality of life, and hope? Coping, quality of life, and ... and Powers Quality of Life Index (QLI) has been designed to measure quality of life in both ill and healthy individuals, and this was based on Ferrans' definition of quality of life [12,18]. ... experience of coping and quality of life, and their hope for the future. Questions about coping included present challenges and choice of coping strategies. Ques- tions about experience of quality of...

Ngày tải lên: 20/06/2014, 15:20

... 2011, 2011:9 http://jwcn.eurasipjournals.com/content/2011/1/9 Page 7 of 13 RESEARCH Open Access Quality of service implications of power control and multiuser detection-based cross-layer design Ulrike ... part of the frame is related to a contention phase and consists of several pairs of minislots. Each minislot is divided into the transmission of an RTS and a CTS signal. The second part of the ... rate; PBOA: Progressive Backoff Algorithm; PHY: physical layer; QoS: quality of service; SINR: signal-to- interference-and-noise-ratio. Author details 1 Institute of Communication Networks, Technische...

Ngày tải lên: 21/06/2014, 03:20