Swing

Reading: Swing
Field:
Programming > Java > Swing

The graphic-related class library which belongs to the programming language Java of the Sun Microsystems corporation usually (the reuse possible program part group). Java 2 (old JDK 1.2) from standard it is the portion of JFC which is loaded. The graphical user interface which in the application software which was developed with Java, does not depend on execution environment and was standardized is offered. From the past, difference of the behavior due to environment in comparison with AWT which is offered, is lost, effective speed is raised, many bugs are removed, improvement such that it corresponds to HTML is administered.

SXGA+ SXGA Plus

Reading: S x Gee a plus
Field:
Imaging > display > structure > SXGA+

It is resolution of 1400×1050 pixel. SXGA (the 1280×1024) it is the resolution which barely is expanded to length and breadth.

It is resolution of 1280×1024 pixel. XGA (1024×768 pixel) it is the resolution which barely expands length and breadth.

SYLK

Reading: Silk
Full spelling: SYmbolic LinK format
Field:
Expression of information > file format > SYLK

One of the file format which is utilized with the spreadsheet program. Those which are adopted for Multiplan of the Microsoft corporation those which spread widely as a in fact de facto standard. Even presently many spreadsheet programs correspond to the reading and writing of the file of SYLK type.

SYN scan

Reading: Thin scan
Alias:
TCP SYN scan
Field:
Security > network > SYN scan

Without leaving the log to the server, port scan is done, one of technique of “stealth scan”.

Actually trying connection, you call that you inspect whether or not the port of the server opens by port scan, but when connection is tried normally, because the log remains on server side, it becomes clear to do port scan. In order to evade this, procedure is made to discontinue by sending the packet which means of connected procedure the cancellation lastly, the fact that record is not made to leave to the log is SYN scan.

With TCP, the client sends the “SYN packet” to the server first, the server in the client the “ACK packet” replies, connection establishes by the fact that the client sends the ACK packet to the server lastly, but connection is discontinued in the SYN scan lastly the “RST packet” (reset) by transmitting from the client. In order to oppose to original gist, you do not have to do the fact that RST is used in this kind of use.

SYN flood attack

Reading: The thin flood like this the [ge] coming
Alias:
TCP SYN flood attack
Field:
Security > network > SYN flood attack

It is the attack which tries the TCP connection which at one of technique of the DoS attack which drives the server to functional stop, is not established in large quantities.

Connection is established with TCP, the client transmits the “SYN packet” to the server, the server the “ACK packet” replies to the client, the procedure that is stepped on the client returns the ACK packet lastly. Until the last ACK packet reaches, server side “response it waits” and while it is state comes to the point of waiting, becomes not be able to open the resource of the memory territory and the like which is prepared for the connection. The attack person who has malice transmits mass SYN request, without sending the ACK packet purposely, leaves, when, server side among those “response it waits” and the number of connections exceeds the limit, becomes a state where connection cannot be accepted anew. This is SYN flood attack.