Others

Calculate the maximum number of hosts Based on the subnet mask. The subnet mask is too large to accommodate. What are the differences? 1. first, the maximum number of hosts in the network is 2 ^ 5 = 32, but don't forget, if the network address is

Run the ping command to test the IPv6 Configuration to obtain the IPv6 Configuration of the computer. Open a command prompt and enter netsh interface ipv6 show interface. At the command prompt, type ping: 1 to ping the loop address. If the ping

OSI data link layer 1. The child layer of the data link layer is the connection layer between the software processes on each layer and the physical layer. It is different from the layer that is executed only in software or hardware. The data link

Ethernet and IEEE802 encapsulation Ethernet and IEEE802 encapsulation. 1. the encapsulation of Ethernet IP datagram is defined in RFC894, while the IP datagram encapsulation of IEEE802 network is defined in RFC1042, and both encapsulation uses a

Network basics-brief descriptions of elements and other knowledge points I. Network Element data or information networks vary in size or function, but all networks have four common basic elements. 1) Rules or Protocols 2) messages 3) Media 4) device

The necessary common network test command (tracert command) tracert (traceroute route tracing) tracks route information. This command can be used to identify all the routes through which data is transmitted from the local machine to the target host,

Data link layer Reading NotesThe data link layer is relatively low at the TCP/IP layer.What has the link layer done? Specifically, we have done the following: 1: send and receive I p datagram for the I P module;2: Send a r p request to module a r p

Nat translation-network address translation technology nat translation technology is a technology that enables LAN and WAN interaction. It can convert internal network numbers and external network numbers. Nat technology has three conversion methods:

The NAT penetration technology using the TCP protocol has been realized for a long time, but it has never been time-consuming, so I have not written it out. Now I have finally got a little free time off, and write it out for sharing. For a long time,

Explanation of TCP/UDP data packets (2): Structure of TCP data packets 1. Figure TCP data packets consist of the header and data, 4 bytes per line (32 bits) the first part contains at least 20 bytes (5 rows) and a maximum of 60 bytes (15 rows). The

Explanation of TCP/UDP data packets (4): TCP data packet instance ParsingInterpretation of TCP/UDP data packets (III): UDP data packet structure http://www.bkjia.com/net/201307/224715.html1 , A complete TCP packet 11:43:26. 893811 IP 10.135.1.108.399

IGMP Snooping Technology Introduction IGMP Snooping IGMP is short for Internet Group Management Protocol Snooping (Internet Group Management Protocol Snooping). It is a multicast constraint mechanism running on a layer-2 device, used to manage and

In iptables, SNAT, DNAT, and MASQUERADE iptables can flexibly perform various network address translation (NAT). There are two main types of network address translation: SNAT and dnat snat are abbreviated as Source network address translation, that

TCP/IP-03-IP 3.1 Introduction IP is the most core protocol in the TCP/IP protocol family. All TCP, UDP, ICMP, and IGMP data are transmitted in IP datagram format. Many people who are new to TCP/IP provide unreliable, connectionless datagram

Analysis of the status of TIME_WAIT of TCP/IP a server crashes some time ago. The reason is that the program cannot create a SOCKET connection due to the excessive number of TCP connections on the server. Finally, the problem is solved. When

TCP parameter settings indicate the identification of the fid_TCP link. The default value is 0 (Flow ID) upper limit of window_Advertised window (upper bond ). The Advertised window is also called the receive window, which indicates the number of

Establish and release a connection over TCPI recently reviewed and prepared the "Computer Network" examination. I felt that the process of establishing connections and releasing connections through the TCP protocol was very important, so I wrote

Before introducing the modification, we realized that TCP immediately needs to generate an ACK (a duplicate ACK) when receiving an out-of-order packet segment ). The duplicate ACK should not be delayed. The purpose of this duplicate ACK is to let

Default gateway: the default-gateway ip address is introduced in three ways: Simply put, it is used when the router disables the routing function. In fact, when the router disables the routing function, it becomes a PC, this command is used to set

Create a Wi-Fi hotspot shared network (win7) netsh wlan show drivers check whether this function is available netsh wlan set hostednetwork mode = allownetsh wlan set hostednetwork ssid = cisco key = cisco456netsh wlan start hostednetwork 1. Please