Programmer Think

1 Introduction As one of the 21 most influential technologies in the 21st century and one of the top ten technologies that change the world, Wireless Sensor Networks (WSN) is widely used in industry, transportation, medical treatment, environmental protection, military management and so on. WSN is usually composed of a large number of wireless ...

Original author: Hollis Character stream, byte stream Bytes and characters Bit is the smallest binary unit and is the operating part of the computer. Value 0 or 1 Byte (byte) is the smallest unit of computer operation data, which is composed of 8 bit s. The value (- 128-127) Char (character) is the smallest readable and writable unit of th ...

catalogue 1, Brief description of route filtering: 2, Distribution list filtering configuration: ——- (1) use ACL to match route entries (used by OSPF process) ——- (2) use prefix list to match routing entries (used by OSPF process) ——- (3) OSPF process + interface usage ——- (4) Note: 3, Modi ...

I BIND domain name service foundation In daily life, people are used to using domain names to access servers, but machines only recognize IP addresses. There is a many-to-one relationship between domain names and IP addresses. An IP address does not necessarily correspond to only one domain name, and a complete domain name can only corres ...

Error point restore: #AR31 isis 1 is-level level-1 Title: AR34 did not learn two equivalent routes 1, Fault root cause judgment After analysis, the root cause of the fault is: the ISIS router level configuration error of AR31 is level-1, and the correct configuration should be level-1-2. 2, Fault analysis 2.1. The fault phenomenon reappea ...

This paper continues to study network programming (I) 1, Development steps of Socket server and client Create SocketAdd information (IP address and port number) to the socketMonitor network connectionsListen for client access and accept a connectionData interactionClose socket 2, Main API s of network programming 1. Specify to speak &quot ...

1, Understand the working principle of LVS-DR 1.1 LVS-DR packet flow analysis (1) The client sends a request to the Director Server (load balancer), and the requested data message (the source IP is CIR and the target IP is VIP) reaches the kernel space. (2)DirectorServer and RealServer are in the same network, and the data is transmitt ...

catalogue 1, There are two main problems in network programming: 2, Two elements in network programming: 3, Communication element 1: IP and port number 4, Realize TCP network programming Example 1: the client sends information to the server, which displays the information on the console. Example 2: the client sends a file to the server, w ...

Networking requirements as Figure 1 , CE1 and CE2 belong to the same VPLS and are connected to the backbone network through PE1 in AS100 and PE2 in AS200 respectively. When there are a large number of cross domain VPLS in each AS, you can configure cross domain BGP VPLS in OptionC mode. In option C cross domain BGP VPLS, VPLS label block info ...

Ospf network type is a very important interface variable. This variable will affect the operation of OSPF on the interface, such as how to send OSPF protocol messages and whether to elect DR and BDR.OSPF has four network types: P2P, P2MP, BMA(Broadcast) and NBMA.Influence of ospf network type: generally, the OSPF interface network type a ...