In recent years, the mobile communication field presents the trend of data and broadband, WiMAX adopts multicarrier modulation technology, which can provide high-speed data service, and has the characteristics of high frequency spectrum resource
1. Three-time Handshake protocolIn the TCP/IP protocol, the TCP protocol provides a reliable connection service with a three-time handshake to establish a connection.First handshake: When a connection is established, the client sends a SYN packet
650) this.width=650; "src=" http://imga.chrome001.com/article/201603/24/2145032eeekhcvevwinciu.png "border=" 0 " Class= "Shadow" alt= "My IP Address" style= "border:0px;vertical-align:middle;margin-bottom:0px;"/>Plugin Introduction:Many times we
First look at the chart below to try to show the location of different TCP/IP and other protocols in the original OSI model
7
Application Layer
such as HTTP, SMTP, SNMP, FTP, Telnet, SIP, SSH, NFS, RTSP, XMPP, Whois,
1. For rails, the mainstream method should be to use the Google library plug-in geoip
GitHub address: https://github.com/simplificator/geoip
Require 'geoip' geoip. new ('geolitecity. dat '). country ('www. atlanta. SK ') => ["www. atlanta. SK
1 , standard network hierarchyThe network is divided from bottom to top: physical layer, Data link layer, network layer, transport layer, Session layer, presentation layer and application layer.The following diagram attempts to show the location of
TPC/IP Protocol is a Transport layer protocol, which mainly solves how data is transmitted in the network, and HTTP is the application layer protocol, which mainly solves how to wrap the data. regarding the relationship between TCP/IP and HTTP
Use GeoIP2 to analyze visitors' IP addresses to obtain geographical location information.
Link: http://blog.csdn.net/johnnycode/article/details/42028841
MaxMind GeoIP2 is widely used to identify locations and other features of Internet users, this
TPC/IP Protocol is a Transport layer protocol, which mainly solves how data is transmitted in the network, and HTTP is the application layer protocol, which mainly solves how to wrap the data. regarding the relationship between TCP/IP and HTTP
Both VoIP and WiMAX pose a threat and challenge to traditional technologies in their respective areas. The combination of them will also make new demands and new effects on the development of communication technology.
Priority support for VoIP
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