the network layer processors
Network Layer
Ngày tải lên :
12/09/2012, 15:06
... in the Internet r r r RIP OSPF BGP Ì 4.7 Broadcast and multicast routing Network Layer 4-30 The Internet Network layer Host, router network layer functions: Transport layer: TCP, UDP Network layer ... network provides network- layer connection service Ì analogous to the transport -layer services, but: service: host-to-host r no choice: network provides one or the other r implementation: in network ... Routing in the Internet r r r RIP OSPF BGP Ì 4.7 Broadcast and multicast routing Network Layer 4-10 Network layer connection and connection-less service Ì datagram network provides network- layer connectionless...
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Securing the Network Infrastructure
Ngày tải lên :
17/09/2012, 10:43
... with the network cable plant • Secure removable media • Harden network devices • Design network topologies Working with the Network Cable Plant • Cable plant: physical infrastructure of a network ... Securing the Cable Plant • Securing cabling outside the protected network is not the primary security issue for most organizations • Focus is on protecting access to the cable plant in the internal network ... access the internal network directly through the cable plant has effectively bypassed the network security perimeter and can launch his attacks at will Securing the Cable Plant (continued) • The...
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Outsourcing the Network II - Green IT and SAN
Ngày tải lên :
17/09/2012, 10:43
... router… Khả kết nối SAN • Thuộc lớp thấp: phần bao gồm kết nối thuộc tầng datalink network • Giao diện Ethernet: Ethernet thường sử dụng để kết nối máy chủ với máy chủ máy chủ với máy trạm • Fibre ... trữ() • Ba phương thức hợp lưu trữ phổ biến nay: – Network- Attached Storage (NAS) – Redundant array of independent disks (RAID) – Storage Area Network (SAN) Các công ty muốn từ kỹ thuật lưu trữ ... trình ứng dụng Mối liên quan việc lưu trữ truyền thống Hợp việc lưu trữ • SAN (Storage Area Network) NAS (Network Attached Storage) hai cách để tổ chức lại hệ thống vào nguồn lưu trữ máy chủ lớn...
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The Three Layer Model
Ngày tải lên :
05/10/2013, 13:20
... a matchmaker: the message type (sometimes called the speech act) and the content The former denotes the intent of the message (e.g., query or assertion) while the latter denotes the information ... either of them The Internet services of the future should aim at exactly the opposite with tailor-made services (and interfaces) for every individual user as the ultimate target Neither the suppliers ... only the ten cheapest cars or the ten cars best fitting the query, should be returned fulfil this supplier's wish It would also undo one of the major advantages of the usage of the middle layer: ...
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The Service Layer, Transaction management and AOP
Ngày tải lên :
08/10/2013, 21:20
... We also supply the name of the aspect implementation method as the parameter to the method attribute, the name of the arguments to be provided to the aspect (the name defined in the pointcut of ... Figure 5-1 The service layer s position in the architecture In addition to grouping functionality for use by higher layers, the service layer will typically group the functionality of lower layers ... approach is that the pointcut definitions become independent of the aspects They can be used to apply other aspects They also reduce the “clutter” of the aspect implementation class The disadvantage...
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The Network Switching Subsystem
Ngày tải lên :
19/10/2013, 03:20
... sent to the HLR The HLR, in turn, forwards the triplets to the VLR, which uses them as input parameters for authentication and ciphering The Glossary provides a detailed description of the authentication ... which queries the HLR and then forwards the call to the MSC where the called party is currently located 4.3.2 The Relationship Between MSC and VLR The sum of the MSC areas determines the geographic ... scenario, the old VLR hands over the related data to the new VLR There are times when the new VLR has to request the subscriber’s HLR for additional data This question then arises: Does the HLR...
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The Network Press - Encyclopedia of Networking - Second Edition
Ngày tải lên :
22/10/2013, 15:15
... somewhere on the network w AL (Application Layer) The topmost of the seven layers in the OSI Reference Model SEE ALSO OSI Layer w Alarm In various network environments, particularly network management, ... establish a connection w AAL (ATM Adaptation Layer) The topmost of three layers defined for the ATM network architecture The AAL mediates between the ATM layer and the various communication services involved ... others AppleTalk Layers AppleTalk is a comprehensive, layered environment It covers networking services over almost the entire range of layers specified in the OSI Reference Model The figure “The...
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Instructor Notes Module 11: Designing the Presentation Layer
Ngày tải lên :
22/10/2013, 16:15
... proper feedback to the user and user-friendly help Emphasize that the task of the designer is to see the application from the viewpoint of the typical user, not from the viewpoint of the experienced ... Strategy Use the following strategy to present this module: ! Application Presentation Layer This section introduces the concept of a presentation layer consisting of the user interface and the user ... that designers must use the concepts and metaphors of the user when designing an interface Additionally, emphasize the importance of basing the design on the use cases and other artifacts developed...
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Look both ways before crossing the network
Ngày tải lên :
22/10/2013, 18:15
... doesn’t provide a true picture of the network, only the specific point under test Cost roadblocks Network operators don’t always see the value of VAMs until after they experience a E C H N O L O ... without exposing the other fiber to the risk of breaking and taking down service Many transmission equipment vendors build in performance monitoring functions into their equipment There is a mistaken ... alarms is done at the path terminating points within long haul or metro routes, making it difficult to locate the exact point of the problem VAMs located at strategic points in the network simplify...
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Module 5: The Facade Layer
Ngày tải lên :
23/10/2013, 00:15
... interfaces in the business logic layer and the data access layer (DAL) This module presents the two types of facade layers: the Web services facade layer and the business facade layer After completing ... able to: ! Describe the differences between the two types of facade layers: the Web services facade layer and the business facade layer ! Describe the role of the facade layers and how to apply ... students to the facade layer The facade layer provides a unified interface to a set of interfaces in the business logic layer and the DAL This module presents the two types of facade layers: the Web...
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The Hackers Layer Handbook
Ngày tải lên :
05/11/2013, 12:15
... by routing them over some other network The other network routers cannot access the computer that is on the private network However, tunneling enables the routing network to transmit the packet ... received by the other end, of course all the headers are removed The Ethernet interface removes the Ethernet header and the checksum It looks at the type code Since the type code is the one assigned ... receives the packet, it recomputes the checksum, and throws the packet away if the answer disagrees with the original The checksum is put on the end of the packet, not in the header When these packets...
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Tài liệu Look both ways before crossing the network doc
Ngày tải lên :
10/12/2013, 16:15
... traffic The pattern is carried on the network or circuit under test, then test equipment at the receive point determines whether the transmission is successful (without errors) At this point, the ... luck, the CLEC can find the one or two prevent loss of business It people who are familiar with the gives the service provider equipment, then wait for them to go flexibility in choosing the test ... to the rear, the other to the front lems For example, an ILEC hands off OC-12 One approach is to (622-Mbit/sec) optical bandwidth to disconnect the connecan Internet service provider (ISP); the...
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Tài liệu Chapter 2 - Communicating over the Network CCNA Exploration 4.0 docx
Ngày tải lên :
12/12/2013, 14:15
... Devices and their Role on the Network • The network devices that people are most familiar with are called end devices These devices form the interface between the human network and the underlying ... www.bkacad.com The Internet – A Network of Networks • • • A global mesh of interconnected networks (internetworks) meets these human communication needs The Internet is created by the interconnection of networks ... Devices and their Role on the Network • • Intermediary devices to provide connectivity and to work behind the scenes to ensure that data flows across the network These devices connect the individual...
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Tài liệu Module 5: The Facade Layer pdf
Ngày tải lên :
21/12/2013, 06:17
... interfaces in the business logic layer and the data access layer (DAL) This module presents the two types of facade layers: the Web services facade layer and the business facade layer After completing ... able to: ! Describe the differences between the two types of facade layers: the Web services facade layer and the business facade layer ! Describe the role of the facade layers and how to apply ... students to the facade layer The facade layer provides a unified interface to a set of interfaces in the business logic layer and the DAL This module presents the two types of facade layers: the Web...
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Tài liệu Reduced Bend Radius Fiber into the Network docx
Ngày tải lên :
21/12/2013, 07:17
... from one end of the fiber to another (see Figure 1) By improving the bend radius of optical fiber, light entering the core is effectively reflected by the cladding back into the core Instead ... ten times the outside diameter of the jacketed cable or 1.5" (38 mm), whichever is greater This new breed of flexible singlemode optical fiber has the potential to significantly reduce these minimum ... impact on network performance For purposes of accuracy, ADC uses the term “reduced bend radius,” because this title best describes what the product actually delivers This paper will discuss the proper...
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Tài liệu Designing for Profitability in the Physical Layer of Wireless Networks docx
Ngày tải lên :
21/12/2013, 08:17
... to the network Creating the proper connectivity foundation starts with network design – where smart network planners design the physical layer for operational efficiency In BSCs and MSCs, there ... in the network The constant change of reconfigurations and maintenance in the network is conducted largely by Operations – a huge workload that has a direct impact on the profitability of the ... connectivity for the physical layer, the Network Planning organization not only meets the requirements of its internal customer – Operations – but also contributes to the profitability of the company...
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Tài liệu Chapter 6 - Addressing the Network – IPv4 pdf
Ngày tải lên :
22/12/2013, 13:17
... www.bkacad.com 41 Testing the Network Layer • Describe the general purpose of the PING command, trace the steps of its operation in a network, and use the ping command to determine if the IP protocol is ... 45 Testing the Network Layer • Describe the role of ICMP in the TCP/IP suite and its impact on the IP protocol H c vi n m ng Bách khoa - Website: www.bkacad.com 46 Testing the Network Layer • • ... addresses are assigned to networks by ISPs and within networks by administrators Determine the network portion of the host address and explain the role of the subnet mask in dividing networks Given IPv4...
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Tài liệu Chapter 5 - OSI Network Layer CCNA Exploration version 4.0 ppt
Ngày tải lên :
22/12/2013, 13:17
... Protocol (IP) • • Define the basic role of the Network Layer in data networks The protocols of the OSI model Network layer specify addressing and processes that enable Transport layer data to be packaged ... referred to as the Maximum Transmission Unit (MTU) Part of the control communication between the Data Link layer and the Network layer is the establishment of a maximum size for the packet H c ... Media independent • Describe the implications for the • use of the IP as it is media independent One major characteristic of the media that the Network layer considers: the maximum size of PDU that...
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