will receive all multicast packets in the network-A displays all interface information-S Display summary information (similar to netstat-i)Add to configure the IPV6 address for the specified NICDel deletes the IPV6 address of the specified network cardmtunetmaskTunel establishing a tunnelDSTADDR set a remote address to establish point-to-point communication-broadcast-pointtopointMulticast setting the multicast flag for the network cardAddress sets IPV4 addresses for network cardstxqueuelen4. Us
interface.The ARP setting specifies whether the NIC supports the ARP protocol.-promisc sets whether the promiscuous mode of the NIC is supported, and if this parameter is selected, the NIC will receive all packets sent to it in the network-allmulti Settings Support multicast mode, if you select this parameter, the NIC will receive all multicast packets in the network-A displays all interface information-S Display summary information (similar to netstat-i)Add to configure the IPV6 address for th
We are bound to encounter a situation where Bank A and bank B open your account almost at the same time and see the original 1000 Yuan deposit on your account, and both banks want to add a 500 yuan deposit to your account. Then, bank A will change 1000 yuan to 1500 yuan, at the same time, Bank B will also change 1000 yuan to 1500 yuan. This is going to be a bad thing! Finally, your bank account at the end o
1. Enter your own salary to calculate the personal income tax: according to the current tax rate (find your own tax rate)
public static void Main (string[] args) {System.out.println ("Please enter your salary:");Scanner sc=new Scanner (system.in);Double money=sc.nextdouble ();Double total=0.0;total=money-3500;Double revenue=0.0;if (totalSystem.out.println ("Congratulations, no watering");}else if (totalrevenue=total*0.03;}else if (total>1500totalrevenue=1500
I feel the same way, but. cn domain name has been cnnic do rotten, in fact, it seems that this is not a personal webmaster anything, in the end, in fact, or cinnic!
OK, back to the theme, talk about my investment in some ideas, I have done Oh! Did you have a note today? Oh please look down
I have been crazy registering more than 1500 these days is not very bad. cn Domain Name purpose is to do garbage station! Oh, I now have more than 10 servers on e
Network//Tcpserver.java by Fpont 3/2000
//Usage:java tcpserver //default port is 1500.
//connection to is closed by client.
//This server handles only 1 connection.
import java.net.*;
import java.io.*;
public class TCPServer {
public static void Main (String args[]) {
int port;
ServerSocket Server_socket;
BufferedReader input;
try {
port = integer.parseint (Args[0]);
}
catch (Exception e) {
System.out.println ("port =
Up interface Bond0 OKBringing Up interface eth0 OKBringing Upnbsp;interface eth1 OK................Below we discuss the following mode for 0, 1 o'clock, respectively.mode=1 operation in the main standby mode, then eth1 as the Backup network card is no ARP[email protected] network-scripts]# ifconfig Verify the configuration information of the NICBond0 Link encap:ethernet HWaddr 00:0e:7f:25:d9:8binet addr:172.31.0.13 bcast:172.31.3.255 mask:255.255.252.0Up broadcast RUNNING MASTER multicast mtu:
network card device:
# VIM Ifcfg-eth0
device= "eth0"
bootproto= "static" Hwaddr= "08:00:27:6a:9d:57" nm_controlled= "
No"
onboot= "Yes"
Bridge= "Xenbr0"
type= "Ethernet"
userctl= "No"
3. Configuring bridging mode requires the NetworkManager service to be turned off:
All two nodes need to operate
#chkconfig NetworkManager off
#service Restart the
Network service after NetworkManager stop configuration:
#service Network Restart
4). Login terminal to view bridge status:
#
Use of Xen virtual machines
(i) using virtual machine profiles and disk files to manually start the virtual machine system
After the virtual machine system is created, the virtual system will start up and use the XM List command to see all the virtual machines that are started , but the next time we restart the system, we will not see the virtual machines created with the XM list . the network device for the virtual machine is not visible in the network device . At this point we need to manua
Recently, I used an online music listening software, which has many good stories for children. However, online music often experiences intermittent disconnection, and the software requires more than 1500 credits to download the entire page. To meet the credit conditions, you need to manually install dozens of recommended applications. Therefore, the attack is decided. If the name of apkis mytest.apk, perform the following steps: Step 1: Obtain the res
Problem description Xiao Ming's company every month to pay Xiao Ming, and Xiao Ming received wages for the payment of personal income tax after the wages. Assuming that his one-month pre-tax salary (after deducting five of the risk of a gold, not withholding tax before the wages) is S-yuan, then he should pay the personal income tax according to the following formula calculation:1) Personal income tax threshold of 3500 yuan, if S not more than 3500, then do not pay taxes, more than 3500 yuan
Computer network summary
1. p110 indicates the MAC frame format in V2 format. The data field (that is, IP packet) length ranges from 46 bytes to 1500 bytes, which is defined for Ethernet, "1500 bytes" is also called the Ethernet MTU (maximum transmission unit, that is, Ethernet limits the maximum length of IP datagram to 1500 bytes ). P185 indicates the IP datag
= 1472 time = 2 ms TTL = 255
......
Ping-F-l 1473 10.1.70.1
Packet needs tobe fragmented but DF set.
Packet needs tobe fragmented but DF set.
......
This indicates that the maximum transmission unit MTU from the client machine to 10.1.70.1 is 1472 + 28 (the length of the packet header encapsulated in the Ethernet) = 1500, and all packets larger than 1500 need to be cut. The default MTU in Ethernet is
About the size of UDP data transmitted over the Internet, Post found on the Forum
Http://bbs.csdn.net/topics/20299532#new_post
Part of the post posted on Delphi monopoly. For details, see
Http://www.delphibbs.com/delphibbs/dispq.asp? Lid = 726166
Wheel learning Note 1: UDP programming in Ethernet
1. During UDP programming, the most common question is how many bytes are sent at a time?Of course, there is no unique answer. The answer to this question varies with the requirements of different syste
Recently in because of learning remoting, purely just to understand, found that remoting is really good things.
We usually have three ways to use remoting, one is
First type: Publishing a public objectExposed objects are created on-premisesSecond type: Remote creation of a public object (SAO)Object creation in the client requestThird type: Remote creation of a private object (CAO)object is created on the host, the client references the object on the server
I do not have a good understanding of
The maximum size of a UDP package can be larger. 1. When programming with UDP, we are most likely to think of the problem of how many bytes are sent at a time? Of course, there is no unique answer. The answer is different from the requirements of different systems. Here I only analyze the situation of sending chat messages like ICQ, in other cases, you may also get some help: First, we know that TCP/IP is generally considered a layer-4 protocol system, including the link layer, network layer, tr
~ 1500 bytes.
· FCS-this field contains a 32-bit Cyclic Redundancy Check (Cyclic Redundancy Check, CRC) value to verify damaged frames.
The initial Ethernet II frame format has some drawbacks. To allow conflict detection, 10 Mbits/s Ethernet requires the minimum group size to 64 bytes. This means that if the frame length does not reach the standard, 0 must be used to fill the short frame. Therefore, the upper-layer protocol must contain a "length" f
analyzing the data, we found that:The data forwarded by the customer on site is far greater than the data during local testing.
Analyze the messages sent by the MonitorServer and the messages received by monitord as follows:
1 // MonitorServer sends Code 2 3 esmonitor_assist_t m_monitord_prms; 4 5... 6 7 tmp = sock. createSock (pConf-> m_monitordServerList [I]. c_str (), ES_MONITOR_PORT, IPPROTO_TCP, CLIENT); 8 9... 10 11 if (sock. sendData (_ int8 *) m_monitord_prms, sizeof (m_monitord_prms)
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