1. 기존 PLANT 내의 제어실에 새로운 CONTROL SYSTEM 을 설치하고 기존 CONTROL SYSTEM 과의 DATA COMMUNICATION을 하려고 한다. 이때 고려해야할 사항을 설명하시오. 또한, OSI (Open System Interconnection) 7 Layer 에 대해 설명하고 TCP/IP 4계층과 비교 및 적용되는 Protocol의 예를 드시오.
① 이기종간의 제어시스템간의 데이타
1. List and describe the security controls
and weaknesses at TJX Companies
TJX used Wired Equivalent Privacy (WEP) encryption system which was easy for hackers to attack. Furthermore, TJX had neglected to install firewalls and data encryption on many of the computers in the wireless network. Besides, TJX transmitted credit card details to banks without encryption, violating credit card com
NG Emission (Noxious Gas emission)
Produced by navigation
result from the combustion of fuel
The principal pollutants :
1) soot
2) particulate matter (PM), sulfur-rich fuels
The effect of NG emission
Local & Regional effect
Acid rain
Photochemical smog
human health (respiratory, asthma)
Global Effect
NG Regulat
1. Introduction
As the computer technology like internet has been developing, many medical images and data related in medical is being applied to medical service for a diverse range of service such as diagnosis, management and treatment. A format of medical information and the standardization of the process of exchange are needed to control to enormous amount of information and exchange it.
Control Protocol)-전송제어 프로토콜
가. 개요
。Connection-oriented Protocol(연결형 프로토콜)
。User data를 순서적으로 확실하게 전송하기 위한 Protocol이다.
。신뢰성이 높은 통신을 실현할 수 있다.
。송신제어 기능 보유하고 있어, 긴급 data표시기능 및 flow(흐름제어)/order(순서제어)/congestion(혼잡제어) control