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I was in the video with the mediarecorder of the problem of the synchronization of videos and audio, asked some people after the feeling should be no time stamp, have always felt that the time stamp is to the user to see a data, check the discovery is not, the following is reproduced. We hope to be useful to you:Let's first introduce you to what a timestamp is. in layman's terms, a timestamp is a set of random numbers generated from the current system time.Timestamps are generally used as an i

transmits the first packet (3000-3499), so the receiver finds a duplicate, and then returns a sack=3000-3500 because the ACK is 4000 means that all data before 4000 is received. So this SACK is d-sack--is designed to tell the sender that I received duplicate data, and our sender also know that the packet is not lost, the missing is the ACK packet.? 1234567 Transmitted Received ACK SentSegment Segment (Including SACK Blocks)3000-3499 3000-3499 3500 (ACK dropped)3500-3999 3500

When it comes to UDP programming, the easiest thing to think about is how many bytes are sent at a time? Of course, this does not have the only answer, compared to different systems, different requirements, the answer is not the same, here just like the ICQ type of sending chat messages to analyze, for other cases, may also get a little help: First of all, we know that tcp/ IP is generally considered to be a four-layer protocol system, including link layer, network layer, Transport layer, appl

Brain Map: SocketFrom the length of the UDP datagram.UDP belongs to the transport layer in the network model. Let's look at the next step from the bottom to the previous step:Theoretically, the maximum IP packet (packet) allowed by the IP protocol is 2^16=65535 (the total IP packet length is 16 bits):But! The length of the Ethernet (Ethernet) data frame must be between 46-1500 bytes, which is determined by the physical characteristics of the Ethernet.

1 are grouped.3.2 Ethernet ProtocolIn the early days, each company had its own way of grouping electrical signals. Gradually, a protocol called "Ethernet" (Ethernet) dominates the situation.Ethernet provides that a set of electrical signals constitutes a packet called "frame". Each frame is divided into two parts: header (head) and data."Header" contains some description items of the packet, such as sender, recipient, data type, etc.; "Data" is the specific content of the packet.The length of t

grouping method. Gradually, a protocol called "Ethernet" occupies a dominant position. According to Ethernet rules, a group of electrical signals constitute a packet called frame ). Each frame is divided into two parts: header and data ). "Header" contains some descriptions of the data packet, such as the sender, receiver, and data type. "data" is the specific content of the data packet. The length of the "Header", which is fixed to 18 bytes. The length of "data". The maximum length is

transmits the first packet (3000-3499), so the receiver finds a duplicate, and then returns a sack=3000-3500 because the ACK is 4000 means that all data before 4000 is received. So this SACK is d-sack--is designed to tell the sender that I received duplicate data, and our sender also know that the packet is not lost, the missing is the ACK packet.Transmitted Received ACK sentsegment Segment (including SACK Blocks) 3000-3499 3000-3499 3500 (ACK dropped) 3500-3999 3500-3999

Source: UDP Transport Packet SizeWhen it comes to UDP programming, the easiest question we can think about is how many bytes are sent at a time? Of course, this does not have the only answer, compared to the different systems, different requirements, the answer is not the same, I only like the ICQ type of sending chat messages for analysis, for other situations, you may also get a little help: First, we know, tcp/ IP is generally considered to be a four-layer protocol system, including link laye

network, the role is responsible for the transmission of 0 and 1 of electrical signals.Third, the link layer3.1 DefinitionsPure 0 and 1 have no meaning and must be interpreted: how many electrical signals are counted in a group? What does each signal bit mean?This is the function of the link layer, which, above the entity layer, determines how 0 and 1 are grouped.3.2 Ethernet ProtocolIn the early days, each company had its own way of grouping electrical signals. Gradually, a protocol called "Et

We are bound to encounter this situation: Bank A and Bank B almost simultaneously open your account and see your account on the original 1000 yuan deposit, and then both banks want to add 500 yuan deposit to your account. Then, bank A will change $1000 to $1500 and Bank B will change $1000 to $1500. That's a bad thing! Finally, your bank account last only 1500 yu

Ethernet Data Frame (802.3) maximum and minimum lengthMarch 20, 2017 19:40:01 Farmwang read: 5370 morePersonal Category: TCP/IPEthernet (IEEE 802.3) frame format:1, Preamble code: 7 byte 0x55, a string of 1, 0 interval, for signal synchronization2, Frame starting delimiter: 1 bytes 0xd5 (10101011), indicating the beginning of a frame3. DA (Destination mac): 6 bytes4, SA (Source mac): 6 bytes5, type/Length: 2 bytes, 0~1500 reserved as Length field valu

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of the IP datagram plus the data frame header is greater than MTU, the data packets are divided into several parts for transmission and reorganized in the target system. For example, the maximum IP packet size (MTU) that can be transmitted over Ethernet is 1500 bytes. If the size of the data frame to be transmitted exceeds 1500 bytes, that is, the IP datagram length is greater than 1472 (

protocol called "Ethernet" occupies a dominant position. According to Ethernet rules, a group of electrical signals constitute a packet called frame ). Each frame is divided into two parts: header and data ). "Header" contains some descriptions of the data packet, such as the sender, receiver, and data type. "data" is the specific content of the data packet. The length of the "Header", which is fixed to 18 bytes. The length of "data". The maximum length is 46 bytes and

transmits data packets, if the length of the IP datagram plus the data frame header is greater than MTU, the data packets are divided into several parts for transmission and reorganized in the target system. For example, the maximum IP packet size (MTU) that can be transmitted over Ethernet is 1500 bytes. If the size of the data frame to be transmitted exceeds 1500 bytes, that is, the IP datagram length is

From love to marriage, it is a happy process for both men and women. If a man spends a lot of money to marry a woman on the eve of his wedding, I wonder if the bride will walk the romantic red carpet with him? However, some people listed a detailed bill on the Internet recently for the wife's fees: [Cost of marrying a Nanjing wife] According to the statistical method on the Internet, we can also estimate how much money the Nanjing wife needs to spend in the Middle School (having a college degre

There are many ways to modify the IP address of the network adapter, but there are two types in general. One is temporary modification, which will expire after the network service is restarted. The other is Permanent modification, it takes effect only after the network service is restarted. In general, the temporary modification application is in the temporary action, and we can also know through the classification name, in order to deal with the following temporary problems. The Permanent modif

Configure jumbo frame for RAC optimization and jumboframe for rac Optimization Configure jumbo frame for RAC Optimization) First, let's talk about the concept of MTU: in network communication, there is a concept of MTU (Max Transmission Unit), that is, the maximum frame size in network Transmission, the default value is 1500 bytes (the Ethernet Variable frame size is 46-1500Byte ). [Root @ node1 ~] # Ifconfig bond0 Bond0 Link encap: Ethernet HWaddr C8

ForWe will surely encounter this situation: Bank A and Bank B open your account almost simultaneously and see the original 1000 yuan deposit in your account, then both banks want to add a deposit of 500 yuan to your account. Then, Bank A will change 1000 yuan to 1500 Yuan, and Bank B will also change 1000 yuan to 1500 yuan. This is terrible! In the end, your bank account has only

24 default Set logout 20 Set banner motd ^ C ! # System Set system baud 9600 Set system modem disable Set system name 5500C Set system location Set system contact ! # Ip Set interface sc0 1 10.230.4.240 255.255.255.0 10.230.4.255 Set interface sc0 up Set interface sl0 0.0.0.0 0.0.0.0 Set interface sl0 up Set arp agingtime 1200 Set ip redirect enable Set ip unreachable enable Set ip fragmentation enable Set ip route 0.0.0.0 10.230.4.15 1 Set ip alias default 0.0.0.0 ! # Command alias ! # Vtp Set