wide area network definition example

... can be implemented to increase network security. There are two primary types of IDS: network based and host-based. The network based system acts similarly to a network level firewall. It cannot ... information about the network con- figuration. Authentication, especially of exter- nal BACnet users. Network Layer Attacks I-Am-Router- To -Network The I-Am-Router-To -Network message can ... Disconnect-Connection- To -Network message. Authentication of user/device. Network Layer Denial of Service (DoS) Attacks Network Layer message sent as Unicast For example, use an Initialize-Routing-Table...

Ngày tải lên: 14/03/2014, 22:20

Ngày tải lên: 04/04/2014, 07:36

Ngày tải lên: 16/07/2014, 21:13

... 8-PSK CDMA2000 1xRTT ã Operates on two 1.25 MHz -wide frequency channels ã Supports 144 Kbps packet data transmission 2 Objectives ã Describe wireless wide area networks (WWANs) and how they are used ã Describe ... 16 2.5 Generation Cellular Telephony (continued) ã 2.5G network technologies General Packet Radio Service (GPRS) ã For TDMA or GSM 2G networks ã Uses eight time slots in a 200 KHz spectrum and ... Kbps for a slowly moving user – 2 Mbps for a stationary user ã 3G network technologies CDMA2000 1xEVDO ã For 2.5G CDMA2000 1xRTT networks 25 Binary Runtime Environment for Wireless (BREW) ã BREW...

Ngày tải lên: 13/09/2012, 10:52

... cấu 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 ... 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 bị...

Ngày tải lên: 25/04/2013, 11:58

... hết sức quan trọng. Giải pháp mạng WAN ( Wide Area Network - Mạng diện rộng ) được áp dụng. Chúng có nhiệm vụ kết hợp tất cả các mạng LAN (Local Area Network ) ở xa lại thành một mạng duy nhất ... có hiệu quả.Theo mô hình OSI (Open System Interconnect ) thì chức năng của router thuộc mức 3 ( Network ), cung cấp thiết bị với thông tin chứa trong các header của giao thức, giúp cho việc xử...

Ngày tải lên: 27/04/2013, 22:04

Ngày tải lên: 01/09/2013, 10:30

... Telephony (SRST). ã Application networking servicesWAE network module (NME-WAE-302, NME-WAE-502). ã Network management servicesThe Network Access Module (NM-NAM) offers network monitoring services ... the network path) or destination IP (service group 62 in the network path). The allocated hash buckets are synchronized within the service group, and the hash 49 Enterprise Branch Wide Area ... NME-WAE-302 NME-WAE-502 Network module WAAS network modules cannot be configured as a WAAS CM. Supported on the 2800 and 3800 ISR routers. Network management NM-NAM Network module Table 4...

Ngày tải lên: 10/12/2013, 16:15

... supports the storage area network (SAN) fabric and connectivity between servers and other storage devices, such as storage arrays and tape drives. Front End Network The front-end network contains ... 95134-1706 USA Enterprise Data Center Wide Area Application Services (WAAS) Design Guide This document offers guidelines and best practices for implementing Wide Area Application Services (WAAS) ... End Network 12 Core Layer 13 Aggregation Layer 13 Access Layer 13 Back-End Network 14 SAN Core Layer 14 SAN Edge Layer 15 WAN Edge Component 15 19 Enterprise Data Center Wide Area...

Ngày tải lên: 10/12/2013, 16:16

... FTP Packets are: Marked (colored) at ingress at network edge IP Precedence / Differentiated Services Code Point (DSCP) set Policed and shaped at the network edge Potentially discarded by Weighted ... matching traffic pattern, for example, 25Kbps of traffic to “Bronze” San Jose Ottawa CAR Bandwidth Management CAR Bandwidth Management Today, all the packets on the network look the same, and are ... be used to police precedence bits set externally to the network either by the customer or by a downstream service provider. Thus the network can decide to either accept or override external...

Ngày tải lên: 11/12/2013, 14:15

Ngày tải lên: 18/12/2013, 12:32

... Chapter11 Wide Area Networking Protocols Introduction to Wide Area Networks WAN 是覆盖地理范围相对较为广阔的数据通信网络,它一般是利用公共载体(比如电信公司) 提供的设备进行传输.WAN 技术运行在 OSI 的最下 3 层 广域网 (Wide Area Network, WAN)的一些术语 ... 使用网络控制协议 (Network Control Protocol,NCP)来验证上层的 OSI 参考模型的网络层协议 6.异步传输模式(Asynchronous Transfer Mode,ATM):国际电信联盟电信标准委员会(ITU-T)制 定的信元(cell)中继续标准.ATM 使用固定长度的 53 字节长的信元方式进行传输,ATM 网络的 面向连接的 Cabling the Wide ... Mode,ATM):国际电信联盟电信标准委员会(ITU-T)制 定的信元(cell)中继续标准.ATM 使用固定长度的 53 字节长的信元方式进行传输,ATM 网络的 面向连接的 Cabling the Wide Area Network Cisco 的串行连接支持几乎所有类型的 WAN 服务.HDLC,PPP 和帧中继使用相同的物理层定 义的接口,但是和 ISDN 的不一样.我们先来回顾下 router...

Ngày tải lên: 21/12/2013, 05:18

... and Wide Area Networks OL-14760-01 Design Considerations ã Use of EIGRP stub areas eliminates queries to spoke routers. ã OSPF must periodically synchronize router databases within an area, ... generating link up/down SNMP traps and syslog messages for network management systems. 28 Ethernet Access for Next Generation Metro and Wide Area Networks OL-14760-01 Design Considerations Design ... Edge Provider Edge Customer Edge (CE) User Network Interface (UNI) Customer Premise Equipment (CPE) 34 Ethernet Access for Next Generation Metro and Wide Area Networks OL-14760-01 Scalability Considerations Table...

Ngày tải lên: 21/12/2013, 06:15

Ngày tải lên: 30/12/2013, 22:06

Ngày tải lên: 17/02/2014, 15:30

... the discussions on network latency, loss, and congestion in the following sections. Network Latency The example at the end of the previous section did not take into account network latency. It ... due to network oversubscription. Network latency, another performance “problem child,” is the amount of time taken for data to traverse a network in between two communicating devices. Network ... with Firewall Switch Router/Switch Processor Multilayer Switch Firewall Services Module Wide- Area Application Engine Application Control Engine 16 Deploying Cisco Wide Area Application Services course, this number might increase...

Ngày tải lên: 21/02/2014, 19:20

... LANs ❚ Mobility ❚ Flexibility ❚ Hard to wire areas ❚ Reduced cost of wireless systems ❚ Improved performance of wireless systems William Stallings Data and Computer Communications Chapter 13 Local Area Network Technology ... transmitter ❙ Must satisfy these for all combinations of sending and receiving station on bus ❙ Usual to divide network into small segments ❙ Link segments with amplifies or repeaters Star Ring Architecture ❚ Feed ... Wireless LAN Applications ❚ LAN Extension ❚ Cross building interconnection ❚ Nomadic access ❚ Ad hoc networks ...

Ngày tải lên: 06/03/2014, 09:21

... nodes )(2 drvcmpbusprop tttt     10/14/2012 28 10/14/2012 30 10/14/2012 1 CAN Controller Area Network 10/14/2012 33 Given: ã CPU oscillator frequency = 32 MHz ã Bit rate = 800 Kbps ã Prescaler= ... transmission of a message, a maximum of five consecutive bits may have the same polarity. ã The bit-stuff area in a CAN bus frame includes the SOF, Arbitration field, Control field, Data field and CRC ... the enumerator until its end is reached. Remember that we are using modulo 2 subtraction. For example, we can divide 100100111 by 10011 as follows: 10/14/2012 21 Message Filtering ã A node...

Ngày tải lên: 18/03/2014, 06:20

... 14, 1995 Abstract. The requirements of wide- area distributed data- base systems differ dramatically from those of local -area network systems. In a wide- area network (WAN) configura- tion, individual ... to take the available network bandwidth into account. The network bidder will be a sepa- rate module in Mariposa. Since network bandwidth is a dis- tributed resource, the network bidders along ... reserve network resources as a group. Mariposa will use a version of the Tenet network proto- cols RTIP (Zhang and Fisher 1992) and RCAP (Banerjea and Mah 1991) to perform bandwidth queries and network resource...

Ngày tải lên: 23/03/2014, 12:20