LAN networking devices

This thesis proposes and implements a new and novel solution on simulators and real devices to solve the mobility problem in a VPN. The new solution adds mobility support to existing L2TP/IPsec (Layer 2 Tunneling Protocol/IP Security) tunnels. The new solution tunnels Layer 2 packets between VPN clients and a VPN server without using Mobile IP, without incurring tunnel-re-establishment at handoff, without losing packets during handoff, achieves better security than current mobility solutions for VPN, and supports fast handoff in IPv4 networks.

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Lecture Basic network management presents the following content: Hardware components, software and operating system, ethernet network overview, internet protocol address, LAN terminology and components, LAN architecture, Microsoft visio, service TCP/IP, LAN networking devices, building a local area network, monitoring network, firewall concepts, virus concepts, wan overview, building a wide area network, wireless concepts.

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Lecture Basic network management - Chapter 4: LAN terminology and components. After studying this chapter you will be able to understand: LAN Terminology, LAN transmission media, LAN technology and topology, LAN networking devices.

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Chapter 9 - LAN networking devices. Chương này giải thích sâu hơn về các thiết bị. Sau khi học xong chương này bạn sẽ hiểu được tại sao gọi Hub là thiết bị layer 1,Switch là thiết bị layer 2,router là thiết bị layer 3; giải thích quá trình hoạt động của switch, quá trình học bảng Mac address table của Switch; giải thích quá trình hoạt động của router, giải thích quá trình học bảng routing table.

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Learning objectives of this chapter include: Identify the basic network media required to make a LAN connection; identify the types of connections for intermediate and end device connections in a LAN; design an addressing scheme for an inter-network and assign ranges for hosts, network devices and the router interface; compare and contrast the importance of network designs.

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After studying this chapter students will be able to: Explain how rules are used to facilitate communication, explain the role of protocols and standards organizations in facilitating interoperability in network communications, explain how devices on a LAN access resources in a small to medium-sized business network.

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In traditional switched LANs, the physical topology is closely related to the logical topology. • Generally, workstations must be grouped by their physical proximity to a switch. • To communicate among LANs, each segment must have a separate port on the backbone device or a connection to a common backbone.

46p vanmanh1008 21-05-2013 41 3   Download

When building a LAN that satisfies the needs of a small or medium-sized business, your plan is more likely to be successful if a hierarchical design model is used. Divided into discrete layers. Each layer has a specific purpose. Becomes modular – maintenance, performance.Interfaces with end devices. Routers, switches, bridges, wireless access points. Provides a means of connecting and controlling which devices are allowed to communicate on the network.

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A WLAN is a shared network. An access point is a shared device and functions like a shared Ethernet hub. Data is transmitted over radio waves. Two-way radio communications (half-duplex) are used. The same radio frequency is used for sending and receiving (transceiver).

54p muathu_102 28-01-2013 73 7   Download

Tham khảo bài thuyết trình 'lans and wlans', công nghệ thông tin, hệ điều hành phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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In this section, we divide connecting devices into five different categories based on the layer in which they operate in a network.

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IEEE has defined the specifications for a wireless LAN, called IEEE 802.11, which covers the physical and data link layers.

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In 1985, the Computer Society of the IEEE started a project, called Project 802, to set standards to enable intercommunication among equipment from a variety of manufacturers. Project 802 is a way of specifying functions of the physical layer and the data link layer of major LAN protocols.

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In random access or contention methods, no station is superior to another station and none is assigned the control over another. No station permits, or does not permit, another station to send. At each instance, a station that has data to send uses a procedure defined by the protocol to make a decision on whether or not to send.

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The data link layer needs to pack bits into frames, so that each frame is distinguishable from another. Our postal system practices a type of framing. The simple act of inserting a letter into an envelope separates one piece of information from another; the envelope serves as the delimiter.

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Personal Area Network (PAN) – interconnection of personal digital devices Neighborhood Area Network (NAN) – connectivity spread over several buildings Local Area Network (LAN) – usually connects computers in a single building – this is the one most people have heard of Metropolitan Area Network (MAN) – public high-speed network with range of about 50 miles Wide Area Network (WAN) – consists of several smaller networks

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Personal computer LANs Low cost Limited data rate Back end networks and storage area networks Interconnecting large systems (mainframes and large storage devices) High data rate High speed interface Distributed access Limited distance Limited number of devices

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Q8.A system sends data from a server to a magnetic disk device over a LAN at a data transfer rate of 10 Mbps. The table below gives the measured transfer speed

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By looking at the addressing structures, you can see that even with a Class C address, there are a large number of hosts per network. Such a structure is an inefficient use of addresses if each end of a routed link requires a different network number. It is unlikely that the smaller office LANs would have that many devices. You can resolve this problem by using a technique known as subnet addressing.

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Objectives: Describe how a hierarchical network supports the voice, and data needs of a small- or medium-sized business. Describe the functions of each of the three levels of the hierarchical network design model, the principles of hierarchical network design (aggregate connectivity, network diameter, and redundancy), and the concept of a converged network. Provide examples of how voice and video over IP affect network design. Select appropriate devices to operate at each level of the hierarchy, including voice and video components.

36p thanhtung_hk 05-11-2010 159 44   Download