Smurf attack

Reading: [sumahu] like this the [ge] coming
Field:
Security > network > Smurf attack

You verify in whether or not it is connected to the computer of specification, to disguise the transmission origin of the packet which is used “ping” command, the attack technique which is accustomed to sending the packet of the mass fake to the computer of the partner. You apply overweight load on the computer and network of the target, when it is worst, you become unserviceable.

In ping command, using the protocol, ICMP, “echo request” (echo request) with you send the packet which is said in the partner who would like to verify, the partner “echo replying” (echo reply) throws the packet and returns. With Smurf attack altering the transmission original IP address of echo request, it sets the address of the partner, it is accustomed to sending to the broadcast address applying of the network to which the partner belongs in large quantities. When it does, besides the fact that the machine with respect to network simultaneously throws mass echo replying facing toward the computer of the partner and returns, network overflows with the packet and returns and transmission speed falls extremely, as for the machine of the target overweight load is imposed in order to process the mass packet.

SNA

Reading: S n a
Full spelling: Systems Network Architecture
Field:
Enterprise information system > computer system > mainframe > SNA

The network architecture which was developed in 1974, designates the mainframe of the IBM corporation as core. The layered structure that is formed the mainframe focusing on, various control processors and the terminal etc connect.
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Trade name in foreign country of game machine “super Family Computer” for the home of Nintendo Co. Also “Super Nintendo” is called.

Game machine “family computer” of one generation ago of the same company (the Family Computer) trade name in the foreign country is “NES”. With the large hit where NES and Super NES follow one another, in Europe and America “Nintendo” like pronoun of the game machine for home there are times when it is used.

SNMP

Reading: S n m tweet
Full spelling: Simple Network Management Protocol
Field:
LAN > Network management > SNMP

In TCP/IP network, the communication equipment which such as rooter is connected to network and computer and terminal protocol in order you watch & to control by way of the network. The equipment which becomes the object of control has the management information database which is called MIB, the equipment which does management does appropriate setting on the basis of MIB of the object equipment.

SNR signal-noise ratio

Field:
Multimedia > sound/music > SNR

The noise for the signal (noise) those which display the quantity with logarithm. When displaying the efficiency of the circuit such as amplifier and the like, it is used. When inputting the reference signal, dB (decibel) with you display output level (signal level), there is no input output level when is (noise level) vis-a-vis. The fact that the signal of high quality you can obtain the extent noise whose numerical value is large little is meant.

SNS Social networking service

Reading: S n s
Full spelling: Social Networking Service
Alias:
Social networking sight, Social Networking Site
Field:
WWW > Sight > community > SNS
Internet > net and society > SNS

It promotes & supports the being connected of the person and the person, the Web sight of community type. Expedient and the place where communication between the friend acquaintances is made smooth are offered, the place where new human relations are constructed hobby and taste, lash up, the graduate school, or via the being connected such as “the friend of the friend” is offered, it is service of member system. Seriously considering the being connected of the person, “unless there is invitation from the existing participant, the service which becomes the system that it cannot participate”, is many, but also the service which recently everyone can register freely increases.

There is no thing which are known mail address in your own profile and function and each other which release the photograph to the member in SNS and the feed function message to another member, it could make new, the address register which registers “the friend”, the function which introduces another friend to the friend, deciding theme such as diary, hobby and the area where can restrict the open range in only the member and the friend of the community function which it can interchange with the bulletin board and the like and the function of the calendar and the like which can write schedule and the birthday etc of the friend it consists. There is also pay service, but many have become free service, it provides the function which nominates the commodity of book and CD etc to announcement and the friend who are published inside the sight, as introduction charge, it has become the profit model that it collects the portion of the sale which rises from there.

SNTP

Reading: The s n tea tweet
Full spelling: Simple Network Time Protocol
Field:
Network technology > TCP/IP > SNTP

Via TCP/IP network at one of the protocol which same period it can point time of the computer, the abridged edition of NTP. It is defined with RFC 2030.

The protocol where NTP forms the time information server hierarchically, exchanges information and same period does time. SNTP abbreviates the inner complicated part of the specification of NTP, has specialized in the use which inquires the time where the client is accurate in the server.

signal-noise ratio SNR

Reading: S n [hi]
Full spelling: Signal to Noise ratio
Field:
Multimedia > sound/music > signal-noise ratio

The noise for the signal (noise) those which display the quantity with logarithm. When displaying the efficiency of the circuit such as amplifier and the like, it is used. When inputting the reference signal, dB (decibel) with you display output level (signal level), there is no input output level when is (noise level) vis-a-vis. The fact that the signal of high quality you can obtain the extent noise whose numerical value is large little is meant.