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 ...
Posted by intercampus on Sat, 19 Feb 2022 09:28:33 +0100
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 ...
Posted by annette on Sat, 19 Feb 2022 03:49:54 +0100
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 ...
Posted by nephish on Sat, 19 Feb 2022 03:22:46 +0100
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 ...
Posted by senatedc on Sat, 19 Feb 2022 01:41:05 +0100
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 ...
Posted by wezalmighty on Fri, 18 Feb 2022 23:30:54 +0100
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 " ...
Posted by gnunoob on Fri, 18 Feb 2022 06:53:24 +0100
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 ...
Posted by bstruss on Thu, 17 Feb 2022 16:02:08 +0100
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 ...
Posted by PC Nerd on Thu, 17 Feb 2022 12:33:18 +0100
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 ...
Posted by metroblossom on Thu, 17 Feb 2022 04:25:54 +0100
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 ...
Posted by VFRoland on Wed, 16 Feb 2022 15:15:55 +0100