Explain why information technologies and systems are so essential in business today.
Define information systems from both technical and business perspectives.
Identify and describe the three dimensions of information system tec
The effect of the server on the proposed expansion does increase its load, up to 9000 bit
per sec. Even though the server load has increased the network has the ability to handle the
expansion. The delay of the network is still constant at a
CSN200 Introduction to Telecommunications, Winter 2000
Review Questions for Test-1 (with Answers)
Review Questions for Test-1 (with Answers):
Chapter 1: Introduction to Data Communications
1.1 Network Basics
1.2 Network Layer Model (most important
Homework Week 1
Consider an application that transmits data at a steady rate (for example, the sender
generates an N-bit unit of data every k time units, where k is small and fixed). Also,
when such an application starts, it will con
Homework Assignment week 4
Chapter 1-Review question 4: List six access technologies. Classify each one as
home access, enterprise access, or wide-area wireless access.
The six access technologies are DSL, FTTH that is fiber to the home, Dial up,
Review question 4: List six access technologies. Classify each one as home access,
enterprise access, or wide-area wireless access.
The six access technologies are DSL, FTTH that is fiber to the home, Dial up, LAN
(Ethernet) , WiFi, 3G & LTTE.
Homework Assignment week 6
Chapter 7-Review Question 2: There are two types of redundancy in video.
Describe them, and discuss how they can be exploited for efficient compression.
Two types of redundancy in video, both of which can be exploited by
Week 3 Homework
R2. What are the two most important network-layer functions in a datagram
network? What are the three most important network-layer functions in a virtualcircuit network?
Network-layer functions in Datagram network:
1. There is no
Homework Assignment week 5
Chapter 6-Review Question 17: What is the difference between a permanent
address and a care-of address? Who assigns a care-of address?
The permanent address for a node is it's IP address when it is at it's home network
Chapter 5: Networks and Transport Layers
Answers to End-of-Chapter Questions
1. What does the transport layer do?
The transport layer links application software in the application layer with the network
and is responsible for the end-to-end delivery of th
91.413 Data Communications I
Fall 2007 Midterm Solution
1. Short Answers (27 points, 3 points each problem).
a. Suppose all of the network sources send data at a constant bit rate. Would packetswitching or circuit-switching be more desirable in this case?
MIS589 Week 7 Network Design Management and
1. (TCO E) One of the five areas of network management as defined by the ISO is _ . (Points : 4)
- fault management
Question 2.2. (TCO E) _ allows network m
Name the different layers in the TCP/IP protocol model, give a brief description
of each layer, and name one protocol that is used in each layer.
FTP, Telnet, HTTP,
application layer defines standards for accessing servi
WEEK 4 IS589 INDIVIDUAL ASSIGNMENT
Week 4 Individual Assignment
MIS589: Networking Concepts and Applications
Chapter 5 Questions
Q3 The two parts of TCP/IP are the transmission control protocol (TCP) and the
internet protocol (IP). The pr
REM File: drop_extra_tables.sql
REM Description: Script to drop the tables created by the
REM sql_book_add_tables.sql script.
REM Created: December 22, 2002 AR
REM MODIFIED: June 21, 2004 AR
REM Version: 2.0
SET ECHO OFF
PROMPT Dropping suppl
- This script adds rows to the DEPT and EMP tables in order to demonstrate outer joins.
- From within SQL*Plus, enter:
- START demoaddrows.sql
SET TERMOUT ON
DELETE FROM EMP WHERE EMPNO = 9999;
INSTALLATION INSTRUCTIONS FOR THE STUDENT
This document describes the files and steps used to create the STUDENT schema, which is used for
all exercises in the Oracle by Example series.
This document is organized as follows:
REM File: sql_book_add_tables.sql
REM Description: Script to create additional example tables found in the
REM Oracle SQL Interactive Workbook, 2nd edition.
REM To drop the tables created in this script, run
REM Created: M
Joins and Subquery study sheet
A join is a query that combines rows from two or more tables, views, or materialized
views ("snapshots"). Oracle performs a join whenever multiple tables appear in the
query's FROM clause. The query's select list can s
Controlling Flow in PL/SQL Procedures
o Do until Loops while condition is false
EXIT when condition;
Counter controlled loops
FOR INDEX IN cfw_REVERSE lower bound . upper bound LOOP
Understanding Data Growth and Best Methodologies
for SQL Optimization with Toad for Oracle Xpert
A White Paper
Product Marketing Manager, Toad
INTRODUCTION . 3
DATA GROWTH . 3
THE GROWTH OF DATA IN NUMBERS
TRIGGERS, PROCEDURES & FUNCTIONS
A TRIGGER defines an action the database takes when a database-related event
The action taken consists of PL/SQL (Procedural Language/Structured Query
Language) code termed the trigger body