《計算機科學導(dǎo)論》課件Unit 6Computer Networks

1、3 and Wireless sensor networks , Microwave signal transmission technology and the gigabit optical fiber .45 6Figure 6.1 Classification of networks by spanning distance78910 11Figure 6.2 LAN Topologies12131415【蜂窩網(wǎng)絡(luò)技術(shù)蜂窩網(wǎng)絡(luò)技術(shù)】16171819Figure 6.3 TCP/IP and OSI model2021222324 25 26 27 282930313233343536

2、Bridge 【網(wǎng)橋網(wǎng)橋】 is an equipment which works at the data link layer to achieve LAN interconnection. It can divide a big LAN into several network segments. In general, bridge receives MAC data frame from LAN. After opening, and validating the frame, bridge will send it to the physical layer according to

3、 another LAN reassembling data frame【重組數(shù)據(jù)幀重組數(shù)據(jù)幀】. Because the bridge is a data link layer device, it may not deal with the data header that upper layer protocols put in. The basic features of bridge are as follows: bridge can connect different LANs at data link layer; bridge can connect LANs which h

4、ave different data link layer protocol, different transmission medium and different transmission speed; bridge connect the internet and transmit/receive data, gives information about the storage, filter MAC address, and retransmit data packets. 3738394041424344454647Contributor484950 5152 傳承傳承 53545

5、5【抖動抖動/閃爍閃爍的視頻的視頻】 56575859also called an intra-nodes cooperation 【節(jié)點內(nèi)協(xié)作】【節(jié)點內(nèi)協(xié)作】, whereas the concept of a larger, wider grid is related to an inter-nodes cooperation【節(jié)點間的協(xié)作】【節(jié)點間的協(xié)作】. Grids are a form of distributed computing whereby a “super virtual computer is made up of many networked loosely cou

6、pled computers which can act together to accomplish very large, complicated tasks. The technique has been widely used in computationally intensive scientific, mathematical, and academic problems through volunteer computing, and it is used in commercial enterprises for various applications such as ec

7、onomic forecasting, seismic saizmik analysis【地震分析】【地震分析】, drug discovery, and back office data processing in support for e-commerce and Web services. Resource coordination on grids become increasingly complex, especially when coordinating the flow of information across distributed computing resources. 60 片上的，內(nèi)置的片上的，內(nèi)置的61626364 plit 65