Zhongcheng Zhiyuan blockchain
1. LAN IP address conflict
(1) ARP virus causes IP address conflict
symptoms of ARP virus:
sometimes it is unable to access the Internet normally, sometimes it is OK, including visiting the Internet neighbors. Copying files cannot be completed and errors occur; The number of ARP packets in LAN is increasing rapidly. When using ARP query, abnormal MAC address or wrong MAC address correspondence will be found, and the situation that one MAC address corresponds to multiple IPS will also appear
arp attack principle
ARP spoofing attack packet generally has the following two characteristics, one of which can be regarded as attack packet alarm: first, the source address and target address of Ethernet packet header do not match the protocol address of ARP packet. Or, the sending and destination address of ARP packet is not in the MAC database of network card, or does not match the MAC / IP of network card. All of these alarm at the first time, check the source address of these data packets (Ethernet data packets) (it may also be forged), and roughly know that the machine is launching an attack. Now there are network management tools, such as network law enforcement officers and P2P terminators, will use the same way to disguise as gateways and cheat clients to visit the gateways, that is, they will obtain the traffic sent to the gateways, so as to realize the functions of network traffic management and network monitoring. At the same time, they will also bring potential harm to network management, It is easy to get the user's password and other related information
how to deal with ARP virus:
first clear the source of ARP virus, and then install ARP firewall. For example, we often use 360arp firewall: install the firewall, and then bundle the IP address with the MAC address
(2) ARP conflict caused by automatic acquisition of IP address
many companies mostly use the form of LAN, but often some computers do not go to the network, the result is artificial replacement of IP address, resulting in IP address conflict, this is mainly to find out the conflict machine OK, or install an ARP firewall can find out. You can also release the IP and get it again. The specific operation is: click "start" in the lower left corner of the windows desktop, select "run", type: ipconfig / release, click "OK", then click "start" - "run" again, type: ipconfig / renew, and click "OK". Usually, the problem can be solved.
IP conflict usually means that two hosts in the same network segment use the same IP number, that is, the host number. Both devices are unable to use the network or are disconnected directly. The reasons for this situation and the solutions are as follows:
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we all know that the composition of IP address is a set of 32 bits indicating the binary number of a computer in the network. Usually, the network address plus the host address becomes a complete set of IP addresses. For example, 192.168.1.1, the first three bytes are the network address, and the last byte is the host address
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because network IP protocol is divided into ABCDE five categories, and we usually use class C network with fewer hosts for home or small groups. It consists of the first three bits of 110, IP range 192.0.0.1 ~ 255.255.255.254, the first three groups are network numbers (a total of 2 ^ 21 = 2097150 network numbers), and the last group is host number (each network can accommodate 254 hosts). Therefore, in other words, hosts in the same network segment can have 254 host numbers, while 0 is network number, IP cannot be assigned, 255 is network detection number, and IP cannot be assigned. So you can choose a number from 1-254 as the host number of the computer, and combine it with the network number to form a group of appropriate IP addresses
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therefore, in the LAN of the same network, if two computers use the same host number, IP conflict will occur. At this time, as long as one of them changes the host number of the last byte of the IP address to an IP different from the other. Of course, the host number must be selected from 1-254. But at this time, it's better to set the IP address to static, which is often called manual input< br />
start
-- & gt
Run
-- & gt< br />CMD
-->< br />ipconfig/all
-->
View IP
-- & gt
set the IP of the same network segment for the two computers respectively, or enter modem
to check whether DHCP is turned on or not
A, Beijing Opera B, Henan Opera C, Sichuan opera
2. Where are oracle bone inscriptions written A)
A, tortoise bone B, stone C, tree D, shell
3. The middle of the five mountains is (b)
A, Huashan B, Songshan C, Hengshan
4. Why didn't compass be called "compass" in ancient times B)
A. facing the north, facing the south, facing the north, facing the south, facing the north, facing the north B)
A, Hubei B, Hunan C, Shandong
6. The largest peninsula in Europe is in (b)
A, Eastern Europe B, northern Europe
7. After the broken filament was put on again, the light was compared with that before the filament was broken (b)< In which country is the International Olympic Philatelic Federation established B)
A, Swiss B, Chinese C, American D, German
9. Chickens are made of eggs (b)
A, B from egg white, C from egg yolk, and C from the mixture of egg white and egg yolk C)
A, oral B, top C, wing D, tail
11, and when drinking Baijiu, it is best (A).
A, heated drink B, direct drink C, drink with cola
12, short for IMF (a)
A, International Monetary Fund B, international economic and Trade Organization C, International Atomic Energy Organization
13. The famous name of Halley's comet comes from (b)
A, place name B, person name C, company name
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A, married B, engaged C, just in love D, which can represent any meaning
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A, Huo Yuanjia B, blessing C, a pair of embroidered shoes d Yellow ribbon
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A, ignition before gas supply B, gas supply before ignition C, fire off before gas supply
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A, state of Qi B, state of Chu C, state of Yan D, state of Zhao
18. The earliest narrative poem in China is (a)
A, Peacock Flying Southeast B, Mulan CI C, Lao Can's travels
19. Which of the nine planets is the coldest C)
A, Jupiter B, mercury C, Pluto D, Neptune
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A, the constitution of the United States B, the constitution of the United Kingdom C, the constitution of the United Nations D, the Charter of France
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A, after the Cultural Revolution B, after the 1911 Revolution C, after the new culture movement D, after the founding of the Qing Dynasty
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A, Earth Moon attraction B, earth rotation C, earth revolution D, yellow red angle
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A, Songhuajiang B, Nenjiang C, Yalujiang
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A, instrial and Commercial Bank of China B, Huaxia Bank of China C, Agricultural Bank of China D, postal savings of China
28. The side opposite the right angle in an isosceles right triangle is called (b)
A, opposite B, chord C, cosine D, hypotenuse
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A, Dunhuang Mogao Grottoes B, Leshan Giant Buddha C, Potala Palace D, terracotta warriors and horses of Qin Shihuang
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65; When winter comes, can spring be far behind? "4) Shelley
66. The highest fat content of the following dried fruits is: (5) walnut kernel
67 Which of the following fruits are stone fruits (2) cherry
69, pig iron is hard and brittle because it contains carbon: (low level) more
70. What do American psychologist and behaviorist Maslow think of people's highest needs (1) self actualization needs
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Suspicion, conceit, lust, all evils are derived from these three, and all virtues are born out of them.
Nietzsche's so-called "one hundred years of cultivation leads to the same boat, and one thousand years of cultivation leads to the same bed". It is a great fate to be a husband and wife. Just imagine how likely it is for a pair of strange men and women to get to know each other, let alone get to know each other, fall in love, fall in love and even get married
Therefore, to be a couple, we should cherish this relationship. The most important thing between husband and wife is considerate, sincere and trust, of which trust is the most important. The trust between husband and wife is just like the two wings of marriage. Only by synchronous cooperation can the marriage last longerno one or anything can break up the two people who really love each other, except the husband and wife themselves. If there is no trust, marriage will be full of suspicion. If there is suspicion and doubt, love will lead to hatred and even tragedy
the investigators extracted the DNA of Meng Nan, the eldest daughter of Zhu Dapeng. According to the identification, it was proved that the eldest daughter was born to Zhu Dapeng. When he learned of the result, Zhu Dapeng shook his head and refused to accept the fact that the identification result was forged
ZHU Dapeng always thinks that he is right and his actions are reasonable, so he didn't forgive his father until he died. On February 1, 2008, Zhu Dapeng was executed and got the punishment he deserved
In the face of such a tragedy, it is useless to accuse Zhu Dapeng of cruelty. We should think deeply about what led Zhu Dapeng to commit a crime and become a vicious murderer No one is born a murderer. In the final analysis, Zhu Dapeng's evil behavior is that he suffered injustice in his childhood and his parents preferred his younger brother, which made him have defects in character and planted seeds of hatred in his heartonce he was suspicious, he amplified the suspicion, firmly believed that his father had done something wrong to him, and then went on the road of killing. Therefore, the influence of the original family on children should arouse everyone's attention. Mental health is as important as physical health
ten years of cultivation to the same boat, a hundred years of cultivation to sleep together. The fate between husband and wife is the fate of several generations, so no matter what the problem should be solved, cherish the hard won happiness, two people choose each other from the vast crowd to form a family, must have experienced a process of mutual recognition
could have been a happy family, but he was suspicious of his wife. In the end, he didn't know how to repent and turned a happy family into a human tragedy
the most taboo between husband and wife is distrust and mutual suspicion, because some non-existent things, destroying a relationship is the most unworthy, so in the marriage relationship, we need to master some psychological knowledge, because it is easy to avoid quarrel by mastering the other Party's mind, quarrel is a very emotional thing strong>