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18 Cards in this Set

  • Front
  • Back
contains the logical structure for the information in a database
o Data Dictionary
is a field that uniquely describes each record
o Primary Key-
is a primary key of one file that appears in another file
o Foreign Key-
helps you specify the logical organization for a database and access and use the information within a database
o Database management system
what are the key parts of the database management system
o DBMS engine
o Data Definition subsystem
o Data manipulation subsystem
o Application generation subsystem
o Data administration subsystem
o Two or more computers connected together so they can communicate with each other to…
o –Share data and information
o –Share software
o –Share hardware (peripheral devices)
o –Share computing power
a network?
Only those authorized to access data can access it
o –Someone capturing data as it is transmitted (remember sniffing!)
o –Easily guessed passwords!
o Confidentiality
Knowing that information comes from the source it claims to come from
o –Spoofing
o –Email
o Authenticity
Knowing that information has not been altered
o –Hacking
o –Network transmission errors
o Integrity –
Network services and resources are available when they are supposed to be
o –Denial of service attacks
o –Network errors or overload
o Availability
What are the key issues in network security?
confidentiality, authenticity, integrity, availability
•Covers a small geographic location
•Usually within a building or between closely located buildings
LAN
•Covers a broader geographic location
•May connect multiple LANs together
Wide Area Network (WAN)
•Covers a distance such as a city or large campus
•May connect multiple LANs together
Metropolitan Area Network (MAN)
o •Least intelligent, least expensive
o •Forwards every packet it receives to every other computer
o •Easy way to connect computers in a small network
hub
o •Like a hub but more intelligent
o •Reads the packet header and forwards it to the correct computer
o •More efficient especially in networks with lots of traffic
switch
o •Manages traffic on the entire network
o •May connect multiple smaller networks
o •Determines the most efficient / least congested route for packets to travel
Router
o •Connects two networks together
Bridge