osi transport layer ppt

... 45 Chapter 4 - OSI Transport Layer CCNA Exploration version 4.0CCNA Exploration version 4.0 Flow Control When datagrams arrive too quickly for a host or gateway to process and the transport function ... Học viện mạng Bách khoa - Website: www.bkacad.com 29 Transport Layer Role and Services • Describe the role of segments in the transport layer and the two principle ways segments can be marked ... mạng Bách khoa - Website: www.bkacad.com 25 Transport Layer Role and Services Học viện mạng Bách khoa - Website: www.bkacad.com 9 • At the Transport layer the three basic operations of reliability...

Ngày tải lên: 22/12/2013, 13:17

Ngày tải lên: 27/06/2014, 16:20

... The protocols of the OSI model Network layer specify addressing and processes that enable Transport layer data to be packaged and transported. The Network layer encapsulation allows its contents ... ) Network Layer Fields Học viện mạng Bách khoa - Website: www.bkacad.com 14 • 8 bits • Specifies the level of importance that has been assigned by upper -layer protocol Routing and Layer 2 Switching Học ... 39 Network Layer Protocols and Internet Protocol (IP) Học viện mạng Bách khoa - Website: www.bkacad.com 3 • Define the basic role of the Network Layer in data networks • The protocols of the OSI model...

Ngày tải lên: 22/12/2013, 13:17

... 1999 URL:http://mike.passwall.com/networking/netmodels/isoosi7layermodel.html [4] R Feig, “The OSI Reference Model”, Date Unknown, URL:http://www2.rad.com/networks/1994 /osi/ osi.htm [5] H S Ha, OSI 7 Layer , 2000 URL:http://userpages.umbc.edu/~hha1/network/protocol.html [6] ... the OSI seven -layer model to Information Security Layer Five- Session Layer The Session Layer is concerned with the organization of data communications into logical flows. It takes the higher layer ... common control at layer four as well as layer three. Firewall rules should be written to be as strict as possible regarding transport layer identity. This means that transport layer protocols should...

Ngày tải lên: 05/03/2014, 21:20

Ngày tải lên: 21/06/2014, 08:20

... from above Wait for ACK or NAK 1 Λ Λ Transport Layer 3-5 Transport vs. network layer ❒ network layer: logical communication between hosts ❒ transport layer: logical communication between ... control ❒ learn about transport layer protocols in the Internet: ❍ UDP: connectionless transport ❍ TCP: connection-oriented transport ❍ TCP congestion control Transport Layer 3-49 Selective ... (message) other header fields TCP/UDP segment format Transport Layer 3-2 Chapter 3: Transport Layer Our goals: ❒ understand principles behind transport layer services: ❍ multiplexing/demultipl exing ❍ reliable...

Ngày tải lên: 12/09/2012, 15:06

... Using Business Desk 44 Review 55 Module 5: Managing the Business Logic Layer Module 5: Managing the Business Logic Layer 3 HTTP: A Stateless Protocol  State: Information or data that ... need the following materials:  Microsoft PowerPoint ® file 2260A_05 .ppt  Module 5, “Managing the Business Logic Layer  Lab 5, “Using Business Desk” Preparation Tasks To prepare ... How HTTP works HTTP is a Transmission Control Protocol/Internet Protocol (TCP/IP) application layer protocol that is responsible for the communication that takes place between browser and server...

Ngày tải lên: 10/12/2013, 16:16

... been segmented by the Transport layer, placed into packets by the Network layer, and further encapsulated as frames by the Data Link layer. The purpose of the Physical layer is to create the ... Physical layer. Characteristics & Uses of Network Media Học viện mạng Bách khoa - Website: www.bkacad.com • The Physical layer is concerned with network media and signaling. This layer produces ... context to give them meaning to the upper layers of the networking model. This framing method can be provided by the Data Link layer, the Physical layer, or by both. • Signal patterns can indicate:...

Ngày tải lên: 22/12/2013, 13:17

... 23 udt.sourceforge.net Simplicity & Expressiveness CCC Base Congestion Control Class CTCP TCP NewReno CGTP Group Transport Protocol CUDPBlast Reliable UDP Blast CFAST FAST TCP CVegas TCP Vegas CScalable Scalable ... variety of protocols  Reliable UDT blast  TCP and its variants (both loss and delay based)  Group transport protocols 11 :: 23 udt.sourceforge.net Examples: Reliable UDP Blast class CUDPBlast: ... and timeliness) 1 :: 23 udt.sourceforge.net Supporting Configurable Congestion Control in Data Transport Services Yunhong Gu and Robert L. Grossman Laboratory for Advanced Computing National...

Ngày tải lên: 15/01/2014, 15:59

... Module 9: The Transactional Data Access Layer 3 The Business Problem DAL Connected Business Logic Layer Disconnected Business Logic Layer Facade Layer Web Services Facade Business Facade Transactional ... business logic layer. The transactional DAL then processes the requests by delegating the requests to the data services layer. The transactional DAL can return to the business logic layer either ... parts. Although the Composite design pattern is a structural design pattern, it works very well to help organize data. Often the Data Shaping Service implements the Composite design pattern....

Ngày tải lên: 17/01/2014, 09:20

Ngày tải lên: 24/01/2014, 19:20

... TCP Mechanisms (3) ❚ Connection termination ❙ Graceful close ❙ TCP users issues CLOSE primitive ❙ Transport entity sets FIN flag on last segment sent ❙ Abrupt termination by ABORT primitive ❘ Entity ... segment is re-transmitted ❚ Receiver must recognize duplicates ❚ Duplicate received prior to closing connection ❙ Receiver assumes ACK lost and ACKs duplicate ❙ Sender must not get confused with ... number space large enough to not cycle within maximum life of segment ❚ Duplicate received after closing connection Credit Scheme ❚ Greater control on reliable network ❚ More effective on unreliable...

Ngày tải lên: 06/03/2014, 09:21

... performance using striping techniques at the link -layer, transport- layer, and application -layer. We are the first to implement and evaluate a transport- layer protocol that can utilize multiple paths ... and robustness. Based on the network layer where the striping techniques are applied, we classify them into link -layer, transport- layer, and application -layer striping. 2.1 Network Testbeds We ... . . . . . . . . . . . . . . . . . . . . 16 2.6 Link -Layer and Application -Layer Striping . . . . . . . . . . . . . . . . 18 2.7 Transport- Layer Striping . . . . . . . . . . . . . . . . . . ....

Ngày tải lên: 15/03/2014, 21:20

... sites. With regard to the effect of magnesium on the activ- ity of the cytosolic NADH/cyto-c electron transport system, our data show a new finding, not elicited pre- viously, that magnesium presents ... nmolÆmin )1 Æmg )1 (Fig. 1). Tentatively, it could be hypothesized that magnesium, with its two positive charges, may function as a linker between the negative charges of phospholipids and/or proteins. ... support for the functional activity, in liver mitochondria, of the cytosolic NADH/cyto-c electron transport system. The oxidation of exogenous NADH occurs exclusively if cyto-c is also present outside...

Ngày tải lên: 23/03/2014, 06:20

... urban elite generally evaluate transportation systems based upon what is there, on inputs. More trains means better transportation. Fewer cars mean better transportation (seriously, they ... discordant song sheet. Best Transportation System among World Megacities: However, the greatest condemnation of some urban planners is usually on the issue of transportation. Los Angeles is ... large enough to justify a National Football League team. TRANSPORT As noted above, Los Angeles has a well coordinated and effective transportation system. Roadways: Los Angeles is renown...

Ngày tải lên: 23/03/2014, 10:20

... long-distance transport, the key transport step in assimilate partitioning for many plants [3–5]. SUT1 serves as a high-affinity transporter, whereas SUT4, a second member of this sucrose transporter ... sucrose uptake system in plants. SBP-mediated sucrose transport displays unique ki- netic features and the protein is not similar to other transport proteins. Here, we report the characterization ... sucrose transport by SBP are separable and function independently. The implications of our findings with respect to the function and membrane topology of SBP are discussed. Keywords: sucrose transporter;...

Ngày tải lên: 23/03/2014, 21:21

Ngày tải lên: 29/03/2014, 15:20

Ngày tải lên: 03/04/2014, 18:20

Ngày tải lên: 13/06/2014, 12:35