Informatics 5- Architectures of Information Systems Flashcards
internet and world wide web
- computers must network to exchange data
- local area networks (LANS)
- internet: global network-of networks using telecommunications protocol/internet protocol stack (TCP/IP)
- 1960s: advanced research project agency network (ARPANET)
- 1989: World Wide Web (WWW) by tim berbers-lee
- browser- hypertext transfer protocol (HTTP)
- hypertext markup language (HTML)- language we talk to
LANS
local area networks
HTTP vs HTTS
- HTTS- secure -> important for healthcare
- HTTP- non-secure
interoperability of the internet
- global use of standards HTTP
- exchange data in HTML
- transport of data by TCP/IP
- each device (host) must have an internet protocol (IP) address
- IP address and a routing prefix or “subnet mask”
- 192.168.10.1 and subnet mask 255.254.254.0
- IP version 4, new one version version 6
- domain name system (DNS)- common language based addresses
application layer
- HTTP
- google drive, blackboard, solar
- must be certified with the EMR to make sure its secure*
host
-you are the host when you are on a computer
host to target
- host (laptop) -> application layer -> transports (TCP) to -> network layer (IP) -> goes to data link layer
- media for data transfer (ethernet) -> is it big enough and secure enough to transmit the data -> this is our biggest issue
- goes back to data link layer -> network layer (IP) -> transport layer (TCP) -> application layer (HTTP) -> target (webserver)
web services
- local PC or server
- web server
- task specific applications via a series of transactions to and from other web-aware applications/services over internet
- representational state transfer (RESTful)- what its gonna look like when it transmits the information
- simple object access protocol (SOAP)- protocol in which the information is transmitted
server
- always multiple transaction with multiple users and multiple programs
- decentralized
- can go everywhere
RESTful
- what its gonna look like when it transmits the information
- representational state transfer
SOAP
protocol in which the information is transmitted
-simple object access protocol
health information organization (HIO) and web services
- requires:
- master patients index (MPI)- consists of the medical record number
- record locator service (RLS)- whos looking at it, where is it being stored, locates records
- gateways- connects and separates within the same network
- adaptors (connectors software)
medical record number
- unique number that identifies the patient
- this is a problem when someone has more than one number bc of mistakes -> new names, new addresses, new insurances
- if you come in unconscious it becomes a problem
- medical record numbers can be merged after bills are paid, labs are in etc.
adaptor
- NIC card
- ethernet port
record locator service (RLS)
- whos looking at the records
- where is it being stored
- locates records
application
-not user friendly
-access network services
-blackboard -> not google
-
presentation
-translates data
session
- establishes, maintains and terminates “sessions”
- logging into blackboard -> creates a session
- now you can communicate
transport
-error recognition and recovery
network
- message control, switching and routing
- how are be getting there
- is it wired?
data link
- packages data from physical layer into frames (special packets) and its responsible for error free from transfer from one computer (node) to another
- data is unstructured information
physical
-unstructured raw data stream from other layers
open systems interconnection stack
- number starts from the top to the bottom
- seven layers of OSI
seven layers of OSI
- numbers start from the top to the bottom
- application layer’
- presentation layer
- session layer
- transport layer
- network layer
- data link layer
- physical layer
- top down -> transmit data
- down to top -> receive data