计算机英语网络科技与协议课件.ppt

班级：110065 成员: 吕锋 姜愿怀 郭盟盟 张倩 演讲者——张笑 网络术语 GPRS——General Packet Radio Service GSM——Global System for Mobile Communications The next HOP DCE----DTE PPP------Point-to-Point Protocol MAC-----Media Access Contorl LAN——Ethetent——EPON RFC——IEEE protocol TCP/IP TCP VS UDP Transport layer of the TCP/IP stack Access to the network layer for applications Connection-oriented protocol Full-duplex mode operation Error checking Sequencing of data packets Acknowledgement of receipt Data-recovery features Operates at transport layer of OSI and TCP/IP models Provides applications with access to the network layer without the overhead of reliability mechanisms Is a connectionless protocol Provides limited error checking Provides best-effort delivery Has no data-recovery features ARP Layer 1 provides the physical media and its encoding. Layer 2 devices provide an interface with the physical media. Layer 2 addresses are MAC addresses. The network layer provides connectivity and path selection between two host systems. Layer 3 addresses are IP addresses. Technology 1、FLSM_VLSM 2、*VLAN——Virtual LAN 3、*STP-----Spanning-Tree 4、Summarization 5、DHCP——dynemic host control protocol 6、NAT——PAT 7、IPV4——IPV6 8、RIP——Routing information protocol 9、EIGRP——gateway routing protocol 10、ACL(access control-lists)——Telnet 11、OSPF——open shortest path first 12、PPP——PPPOE FLSM——VLSM Possible Subnets and Hosts for a Class B Network VLAN SwitchX(config)# vlan 2 SwitchX(config-vlan)# name switchlab99 STP Link Speed Cost (New IEEE Specification) Cost (Old IEEE Specification) 10 Gb/s 2 1 1 Gb/s 4 1 100 Mb/s 19 10 10 Mb/s 100 100 Summarization DHCP r1(config)#ip dhcp pool cisco r1(dhcp-config)#network 12.1.1.0 255.255.255.0 NAT-PAT An IP address is either local or global. Local IPv4 addresses are seen in the inside network. Global IPv4 addresses are seen in the outside network. Simpler header: Routing efficiency Performance and forwarding rate scalability No broadcasts No ch