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Introduction to NetworkingComputers and Software in Networks – Overview
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lessons in Unit 1:
– Types of Computers
– Internal Computer Components:CPUs, Memory, andAccessory Cards
– System Software
– Application Software
– Management and Utility Software
– From Applications to the Network
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7
Lesson 5
Lesson 6
Unit 8
At the end of Lesson 1, you shouldbe able to:
– Identify the primary function of each class of computer
– Understand where each type of computer is typically found in a network
Computers are the endpoints of the networks.Computer types perform unique tasks based on their sizes.
Key Point
This lesson looks at classifications of computers found in networks and the primary purpose of each type.
Introduction to NetworkingComputers and Software in Networks – Types of Computers
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Desktop Computers Desktop computers are sometimes divided
into two broad categories:– Personal computers (PCs and Macs)
– Workstations
Introduction to NetworkingComputers and Software in Networks – Types of Computers
PCs usually run Microsoft Windows operating systems. They can also run Linux and UNIX. Macs run the Apple O/S.
A workstation typically runs a version of the UNIX operating system.
Workstations typically have more graphics capabilities and other high-end hardware.
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Introduction to NetworkingComputers and Software in Networks – Types of Computers
Mid-Range Computers and Servers The term “mid-range” covers a wide range of computer
systems that support more than one user.
Mid-range computers include:
– High-end Reduced Instruction Set Computer (RISC) CPU-based servers (IBM AS/400)
– Intel-based servers (Compaq, Dell, and Hewlett-Packard)
– UNIX-based servers of all types
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Introduction to NetworkingComputers and Software in Networks – Types of Computers
Mid-Range Computers and Servers Mid-range and server systems are commonly used in small to
medium organizations, such as departmental information processing.
Typical applications include:
– Finance and accounting (AS/400)
– Database (Intel-based or UNIX-based)
– Printer servers (Intel or UNIX-based)
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Introduction to NetworkingComputers and Software in Networks – Types of Computers
Mainframe Computers Mainframe computers (also referred to as super computers) and associated
client/server products can manage large organization-wide networks.
The unique and inherent capabilities of leading-edge mainframe systems include:
– Constant availability
– Rigorous backup, recovery, and security
– Huge economies of scale
– High bandwidth I/O facilities
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Introduction to NetworkingComputers and Software in Networks – Types of Computers
Others Laptops, palmtops or PDAs, and thin client
terminals.
Thin client terminals have staged a comeback.
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Introduction to NetworkingComputers and Software in Networks – Types of Computers
Activities
1) Match the characteristics with the computer type; choose all that apply.
Constant availability___
Single user ___
Mobility___
High-end graphics___
Windows operating system___
UNIX___
A. Desktop
B. Mainframe
C. PDAs
D. Server
E. Workstation
F. PC
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Extended Activities
1) The class members will break into four focus groups to discuss computer types. Each group will champion a type of computer, research the applications where they are found, and make a short presentation to the other groups.
The computer types are:
a Desktop computers
b Mid-range computers (including server-based systems)
c Mainframe computers
d Other computers (laptops and PDAs)
Introduction to NetworkingComputers and Software in Networks – Types of Computers
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2) Go to various Web sites and evaluate computer products in each of the categories presented in this lesson. Start with the following:
a Desktop computers (http://www.compaq.com, http://www.dell.com, http://www.gateway.com, and http://www.micron.com)
b Mid-range computers (http://www.hp.com, http://www.ibm.com, and http://www.sun.com)
c Mainframes (http://www.ibm.com, http://www.amdahl.com, and http://www.hitachi.com)
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d Other computers (http://www.3com.com, http://www.apple.com, http://www.hp.com, http://www.ncsa.uiuc.edu, and http://www.oracle.com)
3) List other companies, as well as devices not covered in this lesson, such as specialized process-control computers.
4) Break into discussion groups and examine the various ways PCs have impacted how we interact at home, work, school, and leisure.
Introduction to NetworkingComputers and Software in Networks – Types of Computers
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
At the end of Lesson 2, you shouldbe able to demonstrate an understanding of:
– The function of a CPU in a computer
– The role memory plays in a computer and its impact in the operation of a computer
– I/O of a computer
– Types of storage found in computers
– NICs and how computers connect to a networkAll internal computer components have multiple options for speed and capacity.
Key Point
This lesson reviews important aspects of clients and servers that attach to a network.
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Central Processing Unit (CPU) The microprocessor is the brain of any computer.
The terms microprocessor and CPU are used interchangeably.
There are two basic characteristics that differentiate microprocessors:
– Data bus size is the number of bits that a CPU can send or receive in a single instruction.
– Given in MHz, the clock speed determines how many instructions per second the processor can execute.
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Central Processing Unit (CPU) A 64-bit microprocessor that runs at 450 MHz is more
powerful than a 16-bit microprocessor that runs at 100 MHz.
The vast majority of all desktop PCs incorporate a single Intel architecture processor (such as Pentium).
AMD (Advanced Micro Devices) also manufactures compatible CPUs
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Input/Output A bus is a collection of wires that transmit data from
one part of a computer to another.
The term bus usually refers to aninternal bus.
An internal bus connects appropriate internal computer components to the CPU and main memory.
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Input/Output The size of a bus, known as its width, determines how
much data can be transmitted at one time
A 16-bit bus can transmit 16 bits of data, or two bytes
A 32-bit bus can transmit 32 bits of data, or four bytes
A 64-bit bus can transmit 64 bits of data, or eight bytes
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Input/Output Every bus has a clock speed measured in MHz.
PCs made today include a local bus for data
The local bus is a high-speed pathway that connects directly to the processor.
Bus Width Speed (MHz) Bandwidth (bits) (MB/sec)
8-bit ISA 8 8.33 8.316-bit ISA 16 8.33 16.6EISA 32 8.33 33.3PCI 32 33 13264-bit PCI 64 66 528
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Memory The system’s internal, board-mounted
storage area in the computer
Virtual memory expands the amount of memory for an application beyond the actual physical.
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Memory There are several different types of memory:
– RAM
– ROM
– Programmable read-only memory (PROM)
– Erasable programmable read-only memory (EPROM)
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Network Interface Cards A NIC is the hardware component that
provides connectivity to a network.
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Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
Network Interface Cards
NIC Characteristics
The NIC fits into an expansion slot on the motherboards I/O bus.
LANs
Computer Bus Supported
RAM Buffer Size
Bus Size
Data Rate
Media Type Supported
O/S Supported
Processor Capability
Ethernet, FDDI, Fast Ethernet, ISDN, Token Ring, etc.
MCA,ISA, EISA, PCI, NuBus, VME
8 KB, 16 KB, 32 bit, etc.
8 bit, 16 bit, 32 bit, etc.
10 Mbps, 4 Mbps, 16 Mbps, 100 Mbps, 1Gbps
10Base2, 10BaseT, UTP, STP, Optical/Fiber
VINEs, NetWare, Appletalk, Windows NT, etc.
386, 486, Pentium, Pentium II, Pentium III, etc.
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Activities
1) List three speeds at which a CPU might operate.
2) The function of a CPU is to store programs. TRUE / FALSE
3) The amount of RAM determines the speed at which a CPU executes instructions. TRUE / FALSE
4) List at least three types of memory.
Introduction to NetworkingComputers and Software in Networks – Internal Computer
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ActivitiesChoose the correct answer in items five through eight.
5) Which device is associated with short-term storage: hard disk or RAM?
6) What determines the size of a bus: length or width?
7) Which is faster: an ISA or a PCI bus?
8) Draw a rough sketch of a NIC connecting a PC to a network using an RJ-45 connector.
Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
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Extended Activities1) Acquire the following components and use them for
a “show and tell” session: motherboards, CPU chips, NICs, EISA-type cards, PCI-type cards, video cards, PCMCIA cards, memory (SIMM and DIMM chips), and anything else you might find interesting.
2) Go to a Web site (e.g., http://www.dell.com) and find prices for RAM. Pay particular attention to the various sizes offered, such as 8 MB, 16 MB, 32 MB, and 128 MB. Calculate the price per MB for the different sizes. Visit other Web sites for price comparisons.
Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
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Extended Activities
3) Use the Web to look up memory terms such as SIMM, DIMM, EDO, SDRAM, SGRAM. Can you think of any others?
4) Look up information on “plug-and-play” devices. Can any type of expansion card be used in a plug-and-play environment?
5) Go to a Web site such as http://www.webopedia.com and find information on the accelerated graphics port (AGP) interface. Discuss how this is being used.
Introduction to NetworkingComputers and Software in Networks – Internal Computer
Components:CPUs, I/O, Memory, and Accessory Cards
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At the end of Lesson 3, you shouldbe able to demonstrate an understanding of:
– What an operating system is used for in a computer
– The basic functions of an operating system
– The most common types of operating systems
– What a device driver is used for in a computer
System software manages the hardware and software interoperability within a computer.
Key Point
Two primary types of system software are discussed in this lesson, operating systems and device drivers.
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Operating Systems Operating systems perform the most basic of computer tasks.
The tasks of an operating system include:
– Managing the operation of computer programs
– Interpreting keyboard input
– Displaying data to the computer screen
– File I/O
– Controlling peripheral devices, such as floppy disks, hard disks, and printers
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Operating Systems Operating systems can be classified as follows:
– Multitasking
– Multithreading
– Multiuse
– Multiprocessing
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Operating Systems
Operating systems provide a software platform that can run other programs, called application programs.
The application programs must be written to run on top of a particular operating system.
Applications must be “ported” to run in a different operating system environment
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Operating Systems Microsoft has generally dominated the PC operating
system market.
Microsoft Windows was the initial GUI that ran on top of DOS.
Windows for Workgroups 3.11 was Microsoft’s first peer-to-peer network operating system.
Introduction to NetworkingComputers and Software in Networks – System Software
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Operating Systems Windows 95 is a true operating system, not
just a GUI as found in standard Windows.
Windows 98 is another version of Microsoft Windows.
Windows NT is Microsoft’s 32-bit operating system. Windows 2000 is another O/S product.
Introduction to NetworkingComputers and Software in Networks – System Software
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Operating Systems There are two Windows NT options:
– Windows NT Workstation
– Windows NT Server
Windows 2000 has several products such as Windows 2000 Professional and Windows 2000 Server
Introduction to NetworkingComputers and Software in Networks – System Software
The mid-range software market is characterized by competition between UNIX.
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Device Drivers A device driver is special-purpose software used to
control specific hardware devices in a computer system.
Device drivers for NICs control the operation of the NIC and provide an interface for the computer’s operating system.
Introduction to NetworkingComputers and Software in Networks – System Software
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Activities
1) _______________ enables running a program on multiple CPUs.
2) _______________ allows more than one program to run at a time.
3) A _______________ operating system allows many concurrent users.
4) List three tasks accomplished by operating systems.
Introduction to NetworkingComputers and Software in Networks – System Software
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Activities
5) List five operating systems that run on PCs or PC servers.
6) A _______________ _______________ is written for and controls hardware.
Introduction to NetworkingComputers and Software in Networks – System Software
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Extended Activities
1) Using a research tool, such as an Internet search engine, list how many different “flavors” of operating systems exist.
2) Classify the operating systems found in terms of:
a Hardware platform (e.g., desktop)
b Type of application environment normally found
c Specialized operating systems (for handling graphics, etc.)
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3) UNIX systems are sometimes classified as somewhat cryptic regarding their user interface. List what GUIs, such as Xwindows, are available for UNIX-type operating systems.
4) How would you go about getting the latest version of a device driver for a 3Com 3C905 NIC?
Introduction to NetworkingComputers and Software in Networks – System Software
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At the end of Lesson 4, you shouldbe able to demonstrate an understanding of:
– Single-user applications
– Network applications
Application programs are used to accomplish a task or enhance productivity.
Key Point
Applications are computer programs that are used for productivity and automation of tasks. Networks are used to move application information from source to destination.
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Types of Applications Single-user applications include:
– Word processors
– Desktop publishing
– Graphics
– Database
– Spreadsheets
– Web Browsers
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Types of Applications Network applications include:
– Database access
– Print services
– Fax services
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Activities
For each function, choose the type of program and program name (from the next page).
1) Categorize information _______________
2) Document processing _______________
3) Document publishing _______________
4) Manipulate numbers _______________
5) Create artwork _______________
6) Internet retrieval _______________
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Activitiesa Spreadsheet b Adobe Illustrator c Netscape Communicatord Graphicse Microsoft Accessf Databaseg Word processorh Adobe Framemakeri Lotus Notesj Microsoft Wordk Web browser
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Activities
7) List three network applications.
8) Contrast the functions/characteristics of an application program with an operating system.
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Extended Activities
1) Using the Web, list the kind of applications available for LINUX.
2) Go to http://www.netcraft.com and list the usage rates for the various Web server software programs.
3) What are the major database products? Where are these typically being used (e.g., large organizations, small businesses)?
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At the end of Lesson 5, you shouldbe able to demonstrate an understanding of:
– Different types of communication and management software
– Usage of communication programs and processes
– Basic functionality of network management software
Not all computer programs are for individual user productivity.
Key Point
This lesson looks at another category of software, communication and management software.
Introduction to NetworkingComputers and Software in Networks –
Management and Utility Software
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Introduction to NetworkingComputers and Software in Networks –
Management and Utility Software
Management and Utility Software Communication and management software includes:
– System Status Messaging Services
– Network Communications
– Network Security Utilities
– Network Management Tools
– Remote Access Services
– Backup and Recovery Utilities
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Introduction to NetworkingComputers and Software in Networks –
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System Status Messaging Services The network operating system (NOS)
typically provides software on the client workstation to open windows for status messages from remote servers.
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Network Communications Clients access the network through the use
of communication protocols such as Internetwork Packet Exchange (IPX), Transmission Control Protocol/Internet Protocol (TCP/IP), and Ethernet.
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Introduction to NetworkingComputers and Software in Networks –
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Network Security Utilities Network security utilities come in several forms and can often prevent
network failures and damage to an organization’s assets.
Network security specialists classify these threats as follows:
– Hackers
– Bandits
– Trojan horses
– Viruses
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Introduction to NetworkingComputers and Software in Networks –
Management and Utility Software
Network Management Tools Network management tools generally consists of the
following functions:
– Network configuration
– Troubleshooting
– Event notification
– Metrics and planning
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Introduction to NetworkingComputers and Software in Networks –
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Remote Access Services The ability to work anywhere at any time is
creating an urgent need for more secure remote LAN access.
Virtual Private Networks (VPNs) which provide a secure “tunnel” through the Internet are increasing in popularity
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Backup and Recovery Utilities Backup and recovery procedures and
software are extremely important for organizations that rely on stored information.
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Introduction to NetworkingComputers and Software in Networks –
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Activities
1) List at least three utility programs you are familiar with or have heard of.
2) Describe the purpose of a virus protection program.
3) List five things you would like a network management program to provide.
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Introduction to NetworkingComputers and Software in Networks –
Management and Utility Software
Extended Activities
1) Using the Web, look up information on computer viruses. Start with http://www.nai.com.
2) How many known viruses are there?
3) On average, how many new viruses are found every month?
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Introduction to NetworkingComputers and Software in Networks –
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Extended Activities
4) Break into focus groups and research and present information on common network management software, such as HP OpenView, 3Com Transcend, Bay Networks Optivity, and Sun Microsystems Solstice.
5) Research firewall products and list the security issues they address.
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Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
At the end of Lesson 6, you shouldunderstand:
– How applications use the operating system
– How application information is sent from one computer system to another
Applications are closelytied to the underlying operating system.
Key Point
This lesson looks at how application information makes its way from an application in a computer to the network.
Introduction to NetworkingComputers and Software in Networks –
From Applications to the Network
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
Introduction to NetworkingComputers and Software in Networks –
From Applications to the Network
Application-to-Application Communication The following three items must be installed on the local
machine by the local operating system to provide for communication across a network:
– NIC and NIC device driver
– Client software
– Communication software
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
Introduction to NetworkingComputers and Software in Networks –
From Applications to the Network
Application-to-Application Communication
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
Activities
1) Draw a diagram illustrating a small network (two nodes). Include thorough information on CPU type, memory, type of operating system, NIC, and application(s).
Introduction to NetworkingComputers and Software in Networks –
From Applications to the Network
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
Extended Activities
1) Break into groups. One group will represent services offered by a multiuser operating system. The other groups will represent different applications, such as e-mail clients, Internet browsers, Web servers, and word processors. Each application group will list the various functions they perform. The operating system group will list the services they offer.
Introduction to NetworkingComputers and Software in Networks –
From Applications to the Network
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
Extended Activities
2) The operating system group will further divide into two groups: a desktop operating system and a server operating system. List the appropriate functions of each group.
3) The various groups (applications) will make requests of the local operating system and the server operating system.
4) Discuss the flow of information at the desktop computer, and from the client to the server.
Introduction to NetworkingComputers and Software in Networks –
From Applications to the Network
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
Unit 1 Summary Quiz
1) List the four computer classifications in order of processing power typically associated with each type.
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
2) List four capabilities of a mainframe.
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
3) What are four common components of a computer system?
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
4) What does I/O stand for?
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
5) Which is an example of a processors clock speed?
a. 400Mhz
b. 64 bit
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
6) What is the difference between RAM and ROM?
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
7) Which of the following I/O bus types support NICs?
a. MCA
b. ISA
c. EISA
d. PCMCIA
e. RAM
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
8) List three different classifications for operating systems.
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
9) Which of the following are managed by the operating system?
a. Keyboard input
b. Screen display
c. File I/O
d. Peripheral control
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
10) List at least two GUI-based operating systems.
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
11) What is the primary purpose of a device driver?
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
12) List three types of devices that use drivers.
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6
13) Which of the following is communication/management software?
a. Groupware
b. Backup
c. Remote access
d. Virus protector
e. Java
Introduction to NetworkingComputers and Software in Networks – Summary Quiz
Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8
Introduction
Lesson 1
Lesson 2
Lesson 3
Lesson 4
SummaryQuiz
Lesson 5
Lesson 6