1. DSL 개요
xDSL 기술이란 좁은 의미에서 볼 때는 xDSL 모뎀간 데이터 전달을 위한 송수신기 기술을 의미하지만 넓은 의미로는 DSL을 구성하는 시스템의 기능 및 구조 운용관리 및 유지보수 기능, 서비스 제공을 위한 망 구조 및 전달 프로토콜 등 광범위한 분야를 포함한다.
국제 표준화 기구인 ITU나 지역
over our competitors, boast the world's fourth largest number of passengers.
Since the opening of Line1 in 1974, Seoul Metro has been the essential cornerstone of mass transportation for Seoul Metropolitan citizen by operating Line1 to Line4. For last few years, Seoul Metro is building an era of ubiquitous access to the digital world on our trains through high-speed wireless internet system.
- Protocol Control Information
AAL-SAP ATM Application Layer - Service Access Point
AARP AppleTalk Address Resolution Protocol, 애플토크 어드레스 도출 프로토콜
AB Address BUS, 주소 버스
ABAM Adaptive Bidirectional Associative Memory
ABC Atanasoff-Berry Computer
ABDCR Abbreviated Dialing Change Restriction, 단축 다이얼 변경 제한
ABI Application Binary Interface
A network is consist of two or more connected computers. To use a network different components such as hardware, software, transmission is required
Network Interface Device
NIC
(Network Interface Card)
Most personal computers today have this card built into the motherboard.
It can be linked with a telephone wire, coaxial cable, or radio signal,in the case of cell phone and wi
What is SAN?
Definition of Storage Area Network
“a network whose primary purpose is the transfer of data between computer systems and storage elements” by SNIA.
a specialized, high-speed network attaching servers and storage devices
DAS (Direct Attached Storage)
Characteristics of DAS
directly connected storage
the easiest way to secure storage
adding external storage app