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BEC 41 Part 2

Information Technology

Controls to detect and prevent equipment failures parity check-a special bit is added to each character to detect if it is lost; echo check- receiving repeats back to sender and resends any characters received incorrectly 3) boundary protection control’s, 4) periodic mtce 5) diagnostic routines.
Personal, Local, Metropolitan, Wide Area Networks PAN-centered around an individual and their personal communication devices; LAN-privately owned within a single building or campus; MAN-larger version of LAN, WAN- span a large geographical area
Private v. public network Private- EDI systems, secure, flexible, performance better than Public, costly; Public-less secure
Router a communications interface device that connects two networks and determines the best way for data packets to move forward to their destinations
Switch a device that channels incoming data from any of multiple input ports to the specific output port that will take the data towards its intended destination
Bridge a device that divides LAN into two segments, selectively forwarding traffic across the network boundary it defines- similar to a switch
Gateway a combination of hardware and software that links to different types of networks.
Proxy server a server that saves and serves copies of web pages to those who request them. Can increase efficiency of Internet operations and help assure data security
TCP/IP (transmission control protocol/internet protocol) the basic communication language or protocol of the Internet; higher layer assembles messages into smaller packets to transmit; lower layer assigns IP addresses and insures messages are delivered to the appropriate IP address
Virus a program or code that requests the computer operating system to perform certiani acitivities not authorized by the user
Trojan horse a malicious security breaking program that is disguised as something benign
Botnet a network of computers controlled by computer called that is designed to perform a repetitive task such as sending span, spreading a virus, etc
COBIT ( control objectives for information and related technology) 1) meeting stakeholder’s needs 2) covering the enterprise end to end 3) applying a single integrated framework 4) enabling a holistic approach 5) separating governance from management
AICPA Principles of a Reliable system 1) Security 2) Availability 3) Processing Integrity 4) Online Privacy 5) Confidentiality
Segregation contols 1) btwn users & IS dept 2) IS dept should not initiate or authorize transactions; 3) segregate programming, data entry, operations, and the library function within the IS dept.
Systems analyst analyzes present user environment and requirements and may recommend 1) specific changes 2) purchase of new system 3) design a new IS system; is in constant contact with user depts..
Systems programmer implements, modifies, debugs the software necessary for making the hardware work
Applications programmer writes, tests, and debugs application software from the specifications provided by the systems analyst
Database administrator ( DBA) maintaining the database and restricting access to DB to authorized personnel
Data preparer prepare and input by key of data into storage devices
Operator responsible for the daily operations of both the hardware and the software, supervises operations on the operator’s console, accepts any required input, , and distributes any output; HELP DESKS
Data librarian responsible for custody of the removable media an fro themaintenance of program and system documentation
Data controllers acts as a liason between users adnd the processing center. Records input data in a control log, follows the progress of processing, distributes output and ensures compliance with control totals
Computer Control activities control program development, program changes, computer operations, and access to programs and data
Programmed Control activities relate to specific computer applications and are embedded in the computer program
Manual follow up of exception reports employee follow up of exception reports
User control activities to test the completeness and accuracy of computer processed transactions manual checks of the computer output against source documents or other input
Computer hardware controls 1) parity check- special bit added to end of each character 2) echo check- receiving hardware repeats back to the sending hardware what it received 3) diagnostic routines 4) boundary protection 5) periodic maintenance
Changing existing systems 1)change request log 2)IS mgr review all changes 3)testing using test data 3)changes documented 4)code comparison program- to compare source and or object codes of a controlled copy of a program with the program currently being used to process data
Physical access to computer facility controls limited physical access ( guard, key card, manual key locks, finger print, visitor log) Hardware and software access controls
Controlling computer operations operators should have access to operations manual, but not detailed program documentation, control group should monitor the operators’s activities, jobs should be scheduled
Other controls back up and recovery, contingency processing, internal and external labels. Input validation ( edit) controls
Processing controls input controls, external labels should be used on removable media with internal head and trailer labels used to determine that all information on a file has been read.
Application controls follow up of exception reports
Activities to test the completeness and accuracy check computer output against source documents 2) review computer processing logs to determine that correct number of jobs executed properly 3) procedures and communication to authorized recipients of the output
Created by: tsp7c
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