PASS HOTMay 6, 20203 min readWhat are the security risks of wireless Internet access?Some people say that the safety and reliability of flying is very high, the probability of accident is only a few millionths, but it can...
PASS HOTMay 2, 20203 min readWhy does TCP send RST packets twice in a row?Will the packets captured by Wireshark have two RSTs in one connection? Two RST records appeared in 247,248. Was wireshark displaying...
PASS HOTApr 29, 20203 min readWhat kind of global disaster on the Internet will the BGP route leak cause?Recently, I was studying the global catastrophe accident on the Internet. I suddenly saw this latest accident and felt very enlightening,...
PASS HOTApr 26, 20204 min readIs VLAN a Layer 2 technology or a Layer 3 technology?The current project always mentions VLAN. No matter whether Party A has this requirement or not, VLAN must be switched at Layer 3. This...
PASS HOTApr 21, 20203 min readHow to explain the cloud and cloud computing simply?I often see the words "cloud" and "cloud computing" on the Internet. I didn't know what these words meant, so I went to Baidu...
PASS HOTApr 19, 20203 min readWill IPv6 replace the MAC address?Although this question is a bit absurd, it is of great value for discussion. Whether it is an IPv4 or IPv6 address, it is globally unique...
PASS HOTApr 18, 20204 min readDoes it make sense to fully popularize HTTPS?I remember when I was a kid, the open-top truck pulled a cart of apples from the orchard, transported it to the dock, and then loaded it...
PASS HOTApr 16, 20203 min readWhy should I ask TCP / IP / HTTP for these interviews?Regardless of these agreements, what is the best thing to ask? Questions about OSPF and BGP? That's the protocol used by network...
PASS HOTApr 15, 20207 min readHow to carry out network attacks on the intranet?1. Regarding the IP Spoofing attack, if the source IP of the packet is constructed by itself, how should this packet be sent out of the...
PASS HOTApr 13, 20203 min readTCP transmission skills, read this article is enough!ACK changes when uploading files in TCP? In a tcp connection, if only the client side has been uploading files, and the other side's...
PASS HOTApr 11, 20205 min readCCNA 200-301 book release dateIs it correct to understand the working level of forward proxy reverse proxy transparent proxy? CCNA 200-301 book release date. Forward...
PASS HOTApr 10, 20204 min readCCNA 200-301 pdf freeIf the client is connected to port 80 of the server, all data is sent to port 80. At this time, the port in tcp protocol is 80. However,...
PASS HOTApr 9, 20203 min readWhy can't the host ping other hosts in the same broadcast domain?Home Internet access is NAT, and Ping is not connected to other IP on the network segment (confirm online). What isolation technology is...
PASS HOTApr 8, 20205 min readCCNA 200-301 book pdf downloadHow to ensure that the authentication information (AccessToken, etc.) sent by the client is not obtained or forged? Which encryption...
PASS HOTApr 7, 20205 min readCCNA 200-301 sample questionsWe know that the PDU of the application layer is a message, and finally becomes the bit stream of the physical layer to propagate, so...
PASS HOTApr 2, 20204 min readCcna 200-301 Study How to explain TCP reliability?TCP transmission information always misses, and then how to deal with the missing information in the next transmission? Although TCP is a...
PASS HOTApr 2, 20203 min readcisco 200-301 simulator Is it true that TCP transmits byte streams and UDP transmits messages?How to understand that TCP at the transport layer is byte-oriented and UDP is message-oriented? The two are defined by whether they will...
PASS HOTApr 1, 20203 min read200-301 Dumps Can the Last_Ack state be used in an attack?Recently, I suddenly remembered that the state of last_ack seemed to be used. The party who actively cut off the connection intentionally...
PASS HOTApr 1, 20203 min readCcna 200-301 Outline Why does the IP protocol still need the UDP protocol?Since the IP protocol can also perform connectionless and unreliable transmission of data, why do you need the UDP protocol? Protocol...
PASS HOTMar 30, 20203 min readChallenges and opportunities brought by cloud computing to network equipment venI don't know from which day, the three words of cloud computing will slowly enter people's field of vision. At first, it was only...
