Term
| functions of application layer |
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Definition
data storage
data access layer
presentation logic
application logic |
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Term
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Definition
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Term
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Definition
| way functions are spread among clients and servers on the network |
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Term
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Definition
microcomputer
terminal
network computer
transaction terminal
handheld |
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Term
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Definition
mainframe
microcomputer
cluster
virtual server |
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Term
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Definition
| server performs all functions |
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Term
| client-based architecture |
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Definition
client performs most functions
(data storage on the server) |
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Term
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Definition
client and servers share functions
client - presentation logic, application logic
server - data access logic, data storage |
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Term
| host-based architecture problems |
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Definition
bottleneck
expensive
"lumpy" |
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Term
| client-based architecture problems |
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Definition
| data traffic travels between server and client |
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Term
| client-server architecture advantages |
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Definition
-more efficient
-hardware and software from different vendors can be used together |
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Term
| client-server architecture disadvantages |
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Definition
-difficult to get software from different vendors to work together smoothly
-may require middleware |
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Term
| examples of standards for middleware |
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Definition
-CORBA (common object request broker architecture)
-DCE (distributed computing environment)
-ODBC (open database connectivity) |
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Term
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Definition
| standard way of translating between software from different vendors |
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Term
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Definition
| -more than two computers in distributing application program logic |
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Term
| multi-tier architecture advantages |
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Definition
better load balance
scalable |
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Term
| multi-tier architecture disadvantages |
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Definition
heavily loaded network
difficult to program and test |
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Term
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Definition
| most or all application logic on client |
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Term
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Definition
| little or no application logic on client |
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Term
| peer to peer architecture |
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Definition
| all computers can serve as a client and a server |
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Term
| peer to peer architecture advantages |
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Definition
-data can be stored anywhere on the network
-resilient to failure |
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Term
| peer to peer architecture disadvantages |
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Definition
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Term
| criteria for choosing architecture |
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Definition
-infrastructure cost (clients, servers, circuits)
-development costs (software development)
-scalability (+ or - computing capacity) |
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Term
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Definition
| began as hypertext and URLs(unified resource locators) |
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Term
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Definition
| hypertext transfer protocol |
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Term
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Definition
| request line (required), request header optional), request body (optional) |
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Term
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Definition
| response status (optional), request header (optional), request body (required) |
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Term
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Definition
-hypertext markup language
-used to create web pages |
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Term
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Definition
extensible markup language
-new language becoming popular |
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Term
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Definition
| simple mail transfer protocol |
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Term
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Definition
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Term
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Definition
internet mail access protocol
-messages can be left on the server after downloading them to client |
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Term
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Definition
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Term
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Definition
email client application
ex: outlook |
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Term
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Definition
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Term
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Definition
file transfer protocol
-enables sending and receiving files over the internet |
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Term
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Definition
| multipurpose internet mail extension |
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Term
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Definition
| allows one computer to log into another computer |
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Term
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Definition
instant messaging
-client-server programs that allows real-time typed messages to be exchanged |
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Term
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Definition
| provides real time transmission of video and audio signals between two or more locations |
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