used to set the low level or impedance matching.3, the addition of the resistance value of the size of the installation purpose, load conditions and the device limit parameters and other conditions, the size of the resistance determines the weak strength of the installation action.1. Open-drain gate circuits for FET are as follows:
The effect of pull-up resistance in the diagram is as follows:Taki pass or cut-off can be understood as a microcon
Random access memory (RAM) is divided into static random access memory (Static random access memory-sram) and Dynamic random access memory (Memory-dram). one, static random access memory (SRAM)Static random access memory is aRandom access memoryone of them. The so-called "static" refers to the memory as long as it remainsPower on, the data stored in it can be kept constant. Relative,dynamic random access memorythe data stored in (DRAM) needs to be updated periodically. When the power supply i
Dictionary-managed table space (DMT) is a table space management mode that can be used before and after 8 I. It is used to manage the space usage of the table space through the data dictionary.
Oracle uses two dictionaries to record extents usage: SYS. Fet $ to record idle extents and SYS. uet $ to record extents used. When allocating and releasing partitions, you must modify the two dictionaries. It is a DML operation and has competition. Every actio
I suddenly saw a good article about nor and NAND written by someone on the internet two years ago. As a legal citizen of csdn, it is necessary
I. Principles of data storage
Both types of flash memory use three-end devices as the storage unit, which are the source pole, drain pole, and gate. They work in the same way as those of the Fet, the main purpose is to use the effect of the electric field to control the switching between the source pole and the
/O, Fet and gate circuits, as well as the Purple Line filter capacitor and violet line voltage regulator diode caused. For the CPU main power supply short-circuit may be FET, Power Manager and main power filter capacitor. For P4 motherboard, the CPU main power supply short circuit may also be the North bridge short circuit. Detect the ATX power cord to the ground short circuit, and then run the circuit alon
FTTD (Fiber to the Desk) cabling scheme is attributed to the overall FTTx system, FTTD as a high-level solution for cabling systems, the industry is well aware of the excellent transmission performance of fiber as a transmission medium, but also due to the high price of optical fiber active equipment, Led to few projects in the past few years large-scale use of FTTD wiring. In the rapid development of FTTX access network today, especially the development of FTTH networks, due to the overall indu
1. Under/usr/share/fonts/, create a new folder Winfonts, if there is no fonts directory, install fontconfig software (System font Management), and then copy win7 fonts Msyh.ttf and Msyhbd.ttf to Ubuntu/ The usr/share/fonts/.2, install the font, if you do not have the following command to install the Xfonts-utils tool# sudo chmod 664/usr/share/fonts/winfonts/*# cd/usr/share/fonts/winfonts/# sudo Mkfontscale# sudo Mkfontdir# sudo FC-CACHE-FV #建立字体缓存信息3. See if the success# FC-LIST:LANG=ZH-CN #如果成功
When you execute a library script, you tend to drop the original database, and because SQL Server detects a data connection that prevents the drop database operation from being performed, the build script often fails, so we need a way to force a disconnected database. The following T-SQL implementation can be done:
DECLARE @i int DECLARE cur cursor for select spid from sysprocesses where db_name (dbid) = ' your_database_name ' Open cur FET CH Next fr
two ways of tablespace management: (Management extent)1 Data Dictionary Space management dictionary managed tablespaceBy managing two major data dictionary tables, uet$ (used EXtends) and fet$ (free EXtends) implementEliminated after 9iCons: 1 Concurrent access contention2 generate a lot of redo undo3 Space debris2 Local surface space management local managed TablespaceBitmap ManagementData file header added to bitmap areaExtent Management LocalSpeci
codeSql>create table Zeeno as SELECT * from Dba_objects;1), sample (Sample_percent):SQL code-- random 10% records from "Full table scan" in table Zeeno, random query of 5 recordsSql>select object_name from Zeeno sample () where rownumobject_name--------------------------------------------------------------------------------uet$view$I_superobj2triggercol$I_view1Sqlgt; /object_name--------------------------------------------------------------------------------I_file1ind$clu$
function, supports VLAN division, and provides redundant power interface.
Although for layer-3 Switch, DES-3326 performance in general, support expansion slot is relatively small, but the low price is also in exchange for good cost effectiveness. DES-3326 switches are suitable for medium and small network core layer and large campus network convergence, providing Gigabit Ethernet modules can be connected to high-speed backbone network, to effectively alleviate network bottlenecks.
NETGEARFSM732
parameters are the global variables stored in psp_config.c during the operation:Static config_element_t * elements = NULL;Static config_element_t * sub_elements = NULL;
Psp_core_start () starts the resolv thread that processes the received sip signaling, the underlying network packet organization thread tlp, And the sip transaction processing thread sfp.
Main Process Management Function main_run (), processing user input parametersPartysip paramete
The configuration of the cisco configured port false-dead Automatic Recovery in privileged mode is as follows: errdisable recovery cause release recovery cause security-available recovery cause channel-available recovery cause pagp-available recovery cause dtp-available recovery cause link-flap restart errdisable recovery cause sfp-config- discovery recovery cause gbic-discovery recovery cause discovery cure-discovery recovery cause dhcp-rate-discover
to know whether the expected service is available at the outlet. The network owner also wants to know:
At what rate can the network be connected?
Can this outlet provide power for VoIP phones?
Can I access the Internet?
Can I use a network printer?
DTX-NSM network service module can provide answers.
At what rate can the network be connected?
In MAC, after the cable Authentication Test is completed, the new link is connected to the corresponding switch port. All services required by end users sh
, mainly to provide jumpers, third-party certification organizations such as UL and ETL for optical fiber SFP modules and optical fiber distribution frames, and authoritative domestic inspection institutions such as MIIT test reports, the model of the tested product is the same as the model of the bidding product, and the corresponding qualification certificate can be provided. The Integrated Wiring manufacturer selected by the bidder shall have ISO90
See the argument object first argumentsBefore argument a bit, know that it is not a real array, but can also arguments[0] and arguments.length. Record it in detail today.Default behavior of JS: omitted argument is undefined, extra argument is ignored automaticallyfunction A (b,c) { //) Convert class array object to array console.log (Array.prototype.slice.call (arguments)); Console.log (arguments); Console.log (' B: ' +b+ '; C: ' +c '); Arguments[0] can change the value of b arguments[
1. What is the OSPF joining process?1) Send HELLO packets to each other to form two-way communication2) Select DR/BDR Based on the Interface Network Type3) send the first DBD and select the master and slave nodes.4) perform DBD Synchronization5) Interactive LSR, LSU, and LSack for LSA Synchronization6) After the synchronization ends, enter FULL
2. Does OSPF carry complete link status packages?LSU
3. What is the comparison between Link Status Protocol and distance vector protocol?1) Different r
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.