vvx 1500

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Openvpn performance-the first bottleneck of openvpn lies in the Tun driver.

of the real Nic is 1500.We know that for openvpn, it is best to set the MTU at both ends to be consistent. In the case that we are unlikely to change the MTU of the real network before and after openvpn, Tun basically sends and receives messages based on around 1500 of the data, although completely simulating network behavior, however, it is fundamentally different from the real network environment. In the

Cost of finding a wife from all over the country

thousand of household appliances and furniture (some women are charged for dowry ). 4. Cars, based on ordinary scooter, are counted as 0.1 million. Some well-intentioned Nanjing girls also agreed to use electric vehicles as a substitute, totaling 1500 yuan. 5. xi jiu, taking 25 mid-sized hotels as an example, includes self-built wine, cigarettes, sugar, and 1200 × 25 = 30 thousand. The average RMB 1200 for each table is used to collect red packets, w

VIP cannot be started properly, error CRS-1006

bound network card is eth0.[Oracle @ UNID02 ~] $ Srvctl config nodeapps-n UNID02-a-g-s-lVIP exists.:/UNID02-vip/10.0.15.176/255.255.255.0/eth2GSD exists.ONS daemon exists.Listener exists.[Oracle @ UNID02 ~] $ Srvctl config nodeapps-n unid01-a-g-s-lVIP exists.:/unid01-vip/10.0.15.175/255.255.255.0/eth0GSD exists.ONS daemon exists.Listener exists. Ifconfig check found that eth0 is not enabled[Oracle @ UNID02 ~] $ [Root @ UNID02 bin] # ifconfigEth1 Link encap: Ethernet HWaddr A4: BA: DB: 13: EA: C

Use FFMPEG to convert the file format and FFMPEG parameter description

Convert the file test. Avi to test. FLV.FFmpeg-I test. Avi-AB 56-ar 22050-B 500-r 29.97-s 320x240 test. FLVThumbnail capture of files:FFmpeg-I "test. Avi"-y-F image2-ss 4-T 0.001-s 350x240 test.jpgCapture existing FLV files:FFmpeg-I "test. FLV"-y-F image2-SS 8-T 0.001-s 350x240 test.jpg FFmpeg conversion command (test failed)FFmpeg-y-I test. Avi-bitexact-vcodec h263-B 128-R 15-s 176x144-acodec AAC-AC 2-ar 22500-AB 24-F 3GP test.3gpFFmpeg-y-I test. Avi-Ac 1-acodec amr_nb-ar 8000-s 176x144-B 128-R

Getting Started with Internet protocols

the way of interpretation: how many electrical signals to calculate a group, the meaning of each signal?This is the function of the link layer, which, on the physical layer, determines how the 0 and 1 are groupedEthernet protocol:Ethernet provides that a set of electrical signals constitute a packet called "frame", each frame is divided into 2 parts, header (head) and data"Header" contains some description of the packet, such as sender, recipient, data type, etc., "data" contains specific conte

The things about TCP (UP)

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. 1 2 3 4 5 6 7 Transmitted Received ACK SentSegment Segment (Including SACK Blocks)3000-3499 3000-3499 3500 (ACK dropped)3500-3999 35

[Reprint] TCP those things 1

, two Ack is lost, so the sending end multiplicity 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 Sent segment segment (Including SACK Block

Submission of the PHP backend form form in the micro-message applet

submission of form forms. 5.Wxml File Code 6. Several of these key points need to be understood A.form form, need to bind a submit event, in the applet, the property is Bindsubmit, bindsubmit= "Formsubmit" here the attribute value Formsubmit, the name can be any value conforming to the specification, equivalent to onsubmit= "Formsubmit ()" in the previous HTML, is a function name that, when committed, triggers the function event Formsubmit, which is written in JS. B. Other properties are sim

Centos Virtual Machine NAT static IP settings

The NAT static IP address of the centos virtual machine sets the host machine to centos 6.3 64-bit, and the three virtual machines to centos 6.3 64-bit. The Virtual Machine network connection mode is the default NAT mode. By default, virtual machines dynamically obtain IP addresses through DHCP. To build hadoop on three virtual machines, you need to build these three virtual institutions into a LAN that can access each other. Therefore, all three virtual machines are set as static IP addresses.

PHP time stamp examples to explain _php tutorial

Everyone toWe 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 150

Getting Started with internet Protocol------HTTP (1)

, 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 "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"

Basics of Python based network

the early days each company had its own grouping, and later formed a unified standard, the Ethernet protocol EthernetEthernet Regulations A set of electrical signals constitutes a packet called ' frame ' Each data frame is divided into: header head and Data two sections Head Data Head contains: (fixed 18 bytes) Sender/Source Address, 6 bytes Recipient/Destination Address, 6 bytes Data type, 6 bytes Data contains: (minimum

Python full stack development from getting started to abandoning the network foundation

Link layer: Defines how the electrical signals are groupedEthernet protocol:In the early days each company had its own grouping, and later formed a unified standard, the Ethernet protocol EthernetEthernet Regulations A set of electrical signals constitutes a packet called ' frame ' Each data frame is divided into: header head and Data two sections Head Data Head contains: (fixed 18 bytes) Sender/Source Address, 6 bytes Recipient/De

Linux Learning Note 30--Network command ifconfig

examples:Example 1: Displaying network device information (active state)Command:IfconfigOutput:[Email protected] ~]# ifconfigEth0 Link encap:ethernet HWaddr 00:50:56:bf:26:20inet addr:192.168.120.204 bcast:192.168.120.255 mask:255.255.255.0Up broadcast RUNNING multicast mtu:1500 metric:1RX packets:8700857 errors:0 dropped:0 overruns:0 frame:0TX packets:31533 errors:0 dropped:0 overruns:0 carrier:0collisions:0 txqueuelen:1000RX bytes:596390239 (568.7

Python Full Stack learning note (i) network Protocol of Network Foundation

function: mainly based on the electrical characteristics of the transmission of high and low voltage (electrical signal), higher voltage corresponding to the number 1, low voltage corresponding to the number 02.3.2 Data Link LayerData Link Layer origin: pure electrical signals 0 and 1 do not make any sense, you must specify how many bits of electrical signals, each group what meaningThe function of the data Link layer: Defines how the electrical signals are groupedEthernet protocol:In the early

giza++ Run status record and results comparison

gives the various anomalies and the explanations of various executables, and finally gives the related papers. The overall structure of the article is shown below (omitted here): 1. Tool ready to install Linux system, here I am using Ubuntu 9.10,GCC version is 4.4.1. Bilingual Corpus. Here we use 1000 sentences translated in English and Chinese. Cmu-cambridge statistical Language Modeling Toolkit v2. Language Model tool, which is used to generate a language model for decoder invocation. giza++

Use FFmpeg video format conversion, video capture, video capture, screen recording

sound, it is recommended to set to 160kbps (80) or more-vol In this way, to get a high-quality sound quality low-capacity MP4, the first picture is best not to use a fixed bit rate, and the VBR parameter to let the program itselfJudgment, and the sound quality parameters can be raised on the original basis, it sounds more comfortable, it will not be too large (see situation adjustmentExample: Ffmpeg-y-i "1.avi"-title "Test"-vcodec xvid-s 368x208-r 29.97-b 1

Oracle Database statements

pagesize 30; 3 User name switching: such as Conn System/tiger Conn Sys/change_on_install as SYSDBA (note that Superuser is added as SYSDBA at the back) 4 looking for a normal user's table under Superuser is not found. You must look for such as SELECT * from Scott.emp (EMP table under normal user) 5 View current is that user login: show user; 6 See how many tables: SELECT * from tab; (note that tables under different users are different) 7 View the structure of the table: DESC EMP (EMP is the ta

PHP timestamp using instance code _ PHP Tutorial-php Tutorial

The PHP timestamp uses the instance code. We 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 5 to your account. we will certainly 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 500 yuan in deposits to your account. Then, Bank A will change 1000 yu

Internet Protocol Summary, Internet Protocol

characteristics of the network, and is responsible for transmitting 0 and 1 electrical signals. 3. Link Layer 3.1 Definition 0 and 1 alone have no meaning. You must specify the interpretation method: How many electric signals are counted in a group? What is the significance of each signal bit? This is the function of "link layer". It is above the "entity layer" and determines the grouping method of 0 and 1. 3.2 Ethernet protocol In the early days, each company had its own electric signal groupi

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