disadvantages of virtual local area network
CCNA Layer 2 Switching - Virtual Local Area Networks Lab Scenario
... Page 1 of 17 http://www.certificationzone.com/studyguides /?Issue=34&IssueDate=04-01-2001&CP= 11/06/01 Date of Issue: 04-01-2001 CCNA Layer 2 Switching - Virtual Local Area Networks Lab ... Trunking: Off, Encapsulation type: Unknown SwitchA#show trunk b DISL state: Off, Trunking: Off, Encapsulation type: Unknown SwitchA# Note that "Off" is the default DISL state. "Off" ... Enterprise edition software. The Cisco IOS software CLI is not available if the switch has been configured with the Standard edition software. While it is possible to complete most of this lab using...
Ngày tải lên: 19/10/2013, 02:15
Tài liệu The Case for Virtual Local Area Networks (VLANs) ppt
... the history of Ethernet, the virtual LAN is a recent addition. The VLAN was introduced to solve a number of networking issues. In this whitepaper you will learn about the evolution of Ethernet, ... installation of Ethernet networks, a change was made to the network topology . Networks were converted from coaxial cable to twisted pair cabling by introducing a new device into the network. That ... an IP network or subnet. In most practical networks, all devices in a small business or enterprise network are not located on the same Ethernet network broadcast domain. W e separate the networks...
Ngày tải lên: 17/01/2014, 06:20
Wireless Local Area Networks
... AP Quick and easy setup of a wireless network ã Drawback is that wireless clients can only communicate among themselves Wireless Communications Wireless Local Area Networks 4 WLAN Components ã Minimal ... wireless local area networks (WLANs) ã Wireless NIC performs same functions as wired NIC ã Access points parts Antenna Radio transceiver RJ-45 wired network interface 8 Wireless Network Interface ... wired network interface port ã AP functions Wireless communications base station Bridge between the wireless and wired networks 6 Wireless Network Interface Card (continued) 5 Wireless Network...
Ngày tải lên: 13/09/2012, 10:52
Theory of stochastic local area channel modeling for wireless communications
... channels of a certain type. Chapter 3 discusses the basic form that a stochastic local area channel model must take. Great care is taken in defining a local area and a stochastic local area channel, ... HomogeneousPlaneWaves 53 3.1.4 InhomogeneousPlaneWaves 53 3.1.5 PhysicsofHomogeneousvs.InhomogeneousPlaneWaves 55 3.2 TheLocalArea 60 3.2.1 DefinitionofaLocalArea 60 3.2.2 ScattererProximity 60 3.2.3 AWidebandPlaneWave ... stochastic local area radio channels. The theory is applicable to any type of wireless data transmission, regardless of bandwidth, carrier frequency, or environment of operation. The final chapters of...
Ngày tải lên: 20/11/2012, 11:36
LÝ THUYẾT VỀ MẠNG LAN (LOCAL AREA NETWORK)
... duy nhất được nhận dạng bởi thiết bị hai đầu. 5.4 CÔNG NGHỆ VLAN: VLAN là viết tắt của Virtual Local Area Network hay còn gọi là mạng LAN ảo. Một VLAN được định nghĩa là một nhóm logic các thiết ... hình native VLAN thì phải cấu hình ở giao diện vật lý. CHƯƠNG II LÝ THUYẾT VỀ MẠNG WAN (WIDE AREA NETWORK) I. KHÁI NIỆM : Là mạng được thiết lập để liên kết các máy tính của hai hay nhiều khu ... trí rất xa nhau, ví dụ như những quốc gia khác nhau, thì khi đó ta có mạng diện rộng WAN(Wide Area Network) Trang NGUYỄN ĐÌNH CÔNG – 36CLTH 2929 V./. CÁC CÔNG NGHỆ MẠNG LAN : 5.1. CÔNG NGHỆ CHUYỂN...
Ngày tải lên: 25/04/2013, 11:58
Wireless Local Area Networks
... carrier is of a very narrow bandwidth, which means that its data rate is slow. Figure 9.10 shows the spectrum for an OFDM transmission. Wireless Local Area Networks 255 Figure 9.10 Detection of OFDM ... target of this group is to enhance the current 802.11 MAC to provide security improve- ments. 9.7 Summary In this chapter we cover the area of Wireless Local Area Networks by focusing on a number of ... requirement for every network, it is an even more Wireless Local Area Networks 245 Figure 9.5 Example of frequency reuse ẵ2 21I Ê ranfị Ê Slot_time, where i is the number of times the station...
Ngày tải lên: 29/09/2013, 21:20
Chương trình quản lý đào tạo chạy trong môi trường mạng LAN (local area network)
Ngày tải lên: 18/12/2013, 12:32
Thiết lập và định cấu hình cho một mạng LAN (Local Area Network)
Ngày tải lên: 30/12/2013, 22:06
Tài liệu Ethernet Signal Preservation In Factory-Terminated Patch Cords for Local Area Networks pptx
... wave of an Ethernet signal is made of many different sine waves, each important to creating the shape of the square wave. Ethernet Signal Preservation In Factory-Terminated Patch Cords for Local Area ... wave. Figure 1: The square wave of an Ethernet signal. Figure 3: Sine waves of varying frequencies. The philosophy of the TrueNet system is to eliminate the root causes of poor throughput in structured ... square wave is made up of the sum of many sine waves. If anything should happen to the energy in one or more of those sine waves as they travel down the wire, the shape of the square wave can...
Ngày tải lên: 19/01/2014, 05:20
Tài liệu Ethernet Signal PreservationIn Factory-Terminated Patch Cords for Local Area Networks ppt
... wave of an Ethernet signal is made of many different sine waves, each important to creating the shape of the square wave. Ethernet Signal Preservation In Factory-Terminated Patch Cords for Local Area ... effect of distorting the square wave, and causing bit errors in Ethernet. The technique of using specific patch cord lengths to reduce errors has been confirmed with active network analysis of ... the network. Zero Energy Maximum Energy Maximum Energy Wavelength Figure 6: As a sine wave is generated, the greatest amount of energy is released at peaks of the cycle. The philosophy of the...
Ngày tải lên: 25/01/2014, 06:24
Chapter 13 :Local Area Network Technology potx
... wire areas ❚ Reduced cost of wireless systems ❚ Improved performance of wireless systems William Stallings Data and Computer Communications Chapter 13 Local Area Network Technology LLC ... directions ❚ Joins two segments of cable ❚ No buffering ❚ No logical isolation of segments ❚ If two stations on different segments send at the same time, packets will collide ❚ Only one path of segments and ... of cable used ❚ Single channel on cable ❚ Bi-directional ❚ Few kilometer range ❚ Ethernet (basis for 802.3) at 10Mbps ❚ 50 ohm cable Wireless LANs ❚ Mobility ❚ Flexibility ❚ Hard to wire areas ❚ Reduced...
Ngày tải lên: 06/03/2014, 09:21
Thiết lập và định cấu hình cho một mạng LAN (Local Area Network) potx
... Thiết lập và định cấu hình cho một mạng LAN (Local Area Network) Thiết lập mạng: Lắp card mạng: ban đầu bạn phải lắp card mạng vào máy tính bằng ... máy tính. Trong một mạng ngang hàng (Peer to Peer) các máy tính sử dụng hệ điều hành của Microsoft thông thường sử dụng giao thức TCP/IP (Transmission control protocol/ internet protocol). Cài ... TCP/IP cho từng máy (đối với Win 9x) bạn bạn tiến hành: Vào My computer > Control Panel > Network > nếu tại đây bạn đã thấy có giao thức TCP/IP rồi thì bạn khỏi cần add thêm nếu chưa...
Ngày tải lên: 29/03/2014, 14:20
Báo cáo hóa học: " Impact of the environment and the topology on the performance of hierarchical body area networks" ppt
... Jha, Energy comparison and optimization of wireless body -area network technologies, in Proceedings of the ICST 2nd International Conference on Body Area Networks (BodyNets ‘07), Florence, Italy ... 10, the probability of transmission of a relay node is shown as a function of the probability of trans- mission of a single node, considering various values for the numbe r N 1 of nodes in a first-level ... body area networks (BANs) are key building blocks of future generation networks and of the Internet of Things as well. In this article, we present a novel analytical framework for network performance...
Ngày tải lên: 20/06/2014, 22:20
