fet sfp

H3C s5500 is the core and is linked to the s3100 of adjacent buildings. The user reports that the client network in 3100 is unstable. Link mode (5500) network cable (3100 MB photoelectric conversion) optical fiber to adjacent building (MB photoelectric conversion) network cable) First Ping, occasionally packet loss of 3%-5%, and occasionally good .. Strange Check whether the ports 3100 and 5500 are configured normally. Check whether the input and output ports have errors. However, the port uti

Cisco SLM2024 offers 24 10/100/1000mbps RJ-45 connectors and 2 shared Gigabit Optical Small package hot-swappable (SFP) uplink interfaces, 48Gbps switching capacity, bidirectional gigabit forwarding without blocking, and full graphical web configuration interface; General features like VLAN, QoS, IGMP, broadcast suppression, etc. are readily available. The SLM2024 supports 802.1x and port security, which, with radius validation, makes it easy

is similar to the following: Why is there a paragraph error here? Very simple, because we want to copy 256 bytes of ' A ' to 16 byte size buffer, so there is coverage, from the above image can be seen SFP, ret, *str are covered as ' a ', and ' a ' ASIC code is 0x41, So ret is 0x41414141, this address exceeds the program's address range, so is illegal access, there will be a segment error. So a buffer overflow allows us to modify the return address o

= 71)24. query table space usage Select a. tablespace_name "tablespace name ", 100-round (nvl (B. bytes_free, 0)/a. bytes_alloc) *) "usage (% )", Round (a. bytes_alloc/1024/1024, 2) "capacity (M )", Round (nvl (B. bytes_free, 0)/1024/1024, 2) "idle (M )", Round (a. bytes_alloc-nvl (B. bytes_free, 0)/1024/1024, 2) "use (M )", Largest "maximum extension segment (M )", To_char (sysdate, 'yyyy-mm-dd hh24: mi: ss') "Sampling Time" From (select f. tablespace_name, Sum (f. bytes) bytes_alloc, Sum (dec

/oradata/ocp/tp2502.dbf' size50MAutoextend on next 10 m maxsize 2G,'/U01/app/oracle/oradata/ocp/tp2503.dbf' size50M-- EXTENT MANAGEMENT DICTIONARYAutoextend on next 10 m maxsize 2GExtent management local uniform size 2 MSegment space management auto;Create tablespace TP21 DATAFILE '/u01/app/oracle/oradata/ocp/tp2501.dbf' SIZE 50 MExtent management dictionary;Create tablespace tp22 datafile '/u01/app/oracle/oradata/ocp/tp22_1.dbf' size10M, '/u01/app/oracle/oradata/ocp/tp22_2.dbf' size 10 m extent

= 'emp '; Select table_name, index_name from dba_indexes where table_name = 'emp '; 13. Obtain the specific index of a specific table. Select table_name, index_name, column_name, column_position from user_ind_columns or dba_indexes Where table_name = 'emp' Order by table_name, index_name, column_position; 14. view the control file path. Show parameter control; Select * from V $ controlfile; 15. All network and status information of the listener. LSNRCTL status LSNRCTL stop LSNRCTL start 16. vie

Segment segment, partition extent, block logical conceptTable. A-> heap, heap table, relatively slow (records in the heap table are not ordered) Each block has an SCN header and some data is written at the end. (If the block breaks down, the entire block will become unidentifiable)If there is a 12 K table, it will be allocated to two blocks. The role of tablespace: Are a repository for schema object data;Datafile: Oracle automatically stores the table here (table cannot be specified to datafile,

the RST transmission rate.4. At + FRH uses the HDLC protocol to set the fax receiving rate.5. At + FTS stop transmission in a specific period and wait.6. At + fr receives silence. 10. second-class Fax commands1. At + FDT transfers data.2. At + FDR receives data.3. At + FET transfer page punctuation.4. At + fpts page transition status parameters.5. Terminate the meeting at + FK.6. At + fbor page converts the byte sequence.7. At + fbuf buffer size rep

I2C bus signal timing Summary Idle bus statusThe SDA and SCL signal lines of the I2C bus are in the idle state at the same time.At this time, the output-level FET of each device is in the cutoff state, that is, the bus is released.By the two signal lines of the respective pull-up resistance to raise the level. Start SignalThe SDA level of the data line is lowered (that is, the negative hop) during the high-level period of the clock line SCL, which i

With the help of software, you can go to linux for PCB-general Linux technology-Linux programming and kernel information. The following is a detailed description. My bashrc is as follows # Cadence PSD environment icq 111290069. CDS_INST_DIR =/opt/psd CDS_LIC_FILE = $ CDS_INST_DIR/share/cadence. license CDS_DIR = $ CDS_INST_DIR CONCEPT_INST_DIR = $ CDS_DIR CDS_SITE = $ CDS_DIR/share/local/ LD_LIBRARY_PATH = $ LD_LIBRARY_PATH: $ CONCEPT_INST_DIR/tools/lib CDSDOC_PROJECT =/CDS_INST_DIR/doc PATH

　　The MoS tube name comes from the English name Metal (metal), OXID (oxide), semiconductor (semiconductor), is a field-effect transistor, or a semiconductor called a metal insulator. Usually the FET (field effect tube) is generally used as a thin layer of silica as the insulator under the gate, so the usual MOS tube size is smaller than the ordinary bipolar transistor more power-saving, in many cases have replaced the transistor.With the development o

. tablespace_name, Sum (F. bytes) bytes_free From dba_free_space F Group by tablespace_name) B, (Select round (max (FF. Length) * 16/1024, 2) largest, TS. Name tablespace_name From SYS. Fet $ ff, SYS. File $ TF, SYS. Ts $ TS Where ts. Ts # = ff. Ts # And ff. File # = TF. relfile # And ts. Ts # = TF. Ts # Group by ts. Name, Tf. blocks) c Where a. tablespace_name = B. tablespace_name and A. tablespace_name = C. tablespace_name 　　 25. query the degree o

only need to set the output port to 1, which is equivalent to disconnecting the switch. For P0 port, it is a high-impedance state. For open-circuit (OD) output, the output is very similar to that of Open-collector output. Replace the above transistor with a Fet. In this way, the collector becomes the drain pole, the OC becomes the OD, And the principle analysis is the same. Another output structure is push-pull output. The structure of the push-pull

time of ultraviolet radiation, which is inconvenient to use. The eeprom manufactured in 1980s overcomes the limitations of the EPROM, but the integration is not high and the price is higher. As a result, a new storage unit structure similar to EPROM flash memory was developed. Because of its high integration, low power consumption, small size, and fast online erasure, it has developed rapidly and may replace the existing hard disk and floppy disk and become the main large-capacity storage media

production, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), and electroerasable programmable read-only memory (EEPROM) are further developed ). The EPROM can be erased only after a long time of ultraviolet radiation, which is inconvenient to use. The EEPROM manufactured in 1980s overcomes the limitations of the EPROM, but the integration is not high and the price is higher. As a result, a new storage unit structure similar to EPROM flash memory was develope

1 I2C communication protocol and S3C2410 chip Introduction I2C (Inter Integrated Circuit) bus was launched by Philips in 1980. The I2C bus transmits information between the bus and the device using two wires (SDA and SCL), serial communication between the microcontroller and external devices, or bidirectional data transmission between the master device and the slave device. The two communication lines are pulled up to + 5 V through the pull-up resistor. Each Integrated Circuit in the control sys

the screen height.B. Calculate the X coordinate and apply the driving voltage vdrive, X-electrode grounding, and Y + on the X + Electrode to obtain the contact point voltage.Uniformly conductive. The ratio of the contact voltage to the vdrive voltage is equal to the ratio of the contact X coordinate to the screen width. Baidu can refer to the "single-chip microcomputer internal ad for touch screen", but the information on the Internet ignores a core issue. Comparing the two lines above, the thr

v $ fast_start_transaction indicate whether and Restore rows. If you find that parallel recovery is slow, you can try to turn off parallel recovery to see if it can speed up Rollback. Alter system set fast_start_parallel_rollback = false Switch off parallel rollback to serialization. Similarly, if it is a serialized ROLLBACK with CPU resources If this is acceptable, you can use parallel recovery to speed up rollback. If the overall system is displayed Can shut down the database and use parallel

transistor with a Fet. In this way, the collector becomes the drain pole, the OC becomes the OD, And the principle analysis is the same. Another output structure is push-pull output. The structure of the push-pull output is to replace the above pull-up resistor with a switch. When high-power output is required, the switch above is enabled and the switch below is disconnected. When low-power output is required, the opposite is true. Compared OC

, dba_objects oWhere l. Sid = S. SidAnd l. id1 = O. object_id (+)And S. username is not nullIf a lock wait occurs, we may want to know who has locked the table and who has waited.The following statement can be used to query who has locked the table and who is waiting.Select/* + rule */lpad ('', decode (L. xidusn, 0, 3, 0) | L. oracle_username user_name,O. Owner, O. object_name, O. object_type, S. Sid, S. Serial #From v $ locked_object L, dba_objects o, V $ session sWhere l. object_id = O. object