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Midterm

COIS 1010H Midterm: Answers to Potential Test Questions

5 Pages
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Department
Computing & Information Systems
Course Code
COIS 1010H
Professor
Dr.Sabine Mc Connell

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Lecture 1
1. Describe the machine cycle:
Fetch the progra’s istrutios are fethed
Decode the instructions are decoded (translated), so control unit, APU, FPU can understand them
Execute the instructions are carried out
Store the original data or result fro APU or FPU exeutio is stored i the CPU’s registers
2. Describe the three main components of a computer:
CPU central processing unit, does all the calculations
Memory stores the instructions for CPU and the results
Power supply provides the needed electricity for other components
3. Describe four components of a CPU
ALU, FPU perform arithmetic and logical calculations
Control Unit in control of everything, instructs other parts what to do
Registers hold the result of processing
Bus Interface Unit the place where data and instructions enter or leave
4. Describe four different types of storage used in a computer
Hard Disk Drives they store the information on magnetic disks
Solid State Drives they store information on flash memory
Hybrid Disk Drives the symbiosis of HDD and SSD, SSD is cache for increased efficiency
Magnetic Tape Drives they store information on a magnetic tape, low cost for megabyte, used
commonly in archives
5. Why is it important to have fans in a computer?
Because computer components generate heat as current flows through them, so fans help dissipate that
heat. The absence of cooling solution will cause severe parts degradation and possible failure.
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Lecture 2
1. Describe the differences between wired and wireless networks
Convenience for wireless networks: can be used in certain range, thus gives mobility, while wired
network needs a cable attached to operate
Reliability for wired: wireless networks can be interfered or disrupted by weather, walls, other wireless
networks in the same range, wired is typically redundant in this sense
Security for wired: to interfere and hack into the wired network, you need to be physically attached to
a cable, whereas wireless network can be interfered in certain range
Cost for wireless: new wireless networks can be deployed easily (using wireless range extenders,
towers or satellites), whereas wired needs a cable physically run to a place to operate
Speed for wired: wired network has better speed that wireless, as much more data can be transferred
in cable.
2. Describe some of the ways we can use to classify networks (by topology, architecture, size)
Topology: star, bus, mesh, or combined
Architecture: client-server networks
Size: PAN (personal area network), LAN (local area network), MAN (metropolitan area network), WAN
(wide area network)
3. Describe three types of wired networking media
Twisted-pair cable: pairs of cables twisted together, used for telephone and network communications
Coaxial cable: thick centre, insulation around in, used for computer network, short-run telephone
transmissions, cable TV
Fiber-optic cable: glass or fiber strands though which light can pass, used for high speed communication
4. Describe the roles of TCP and IP
TCP is responsible for delivering the data, cuts data into packages
IP provides addresses and routing information
5. Describe 5 hardware components used in a network
Hub central device that connects all devices of a network
Switch connects devices like a hub, but only sends data to a needed device
Bridge used to connect two LANs together
Router responsible for moving packets around in Internet
Modem device that modulates and demodulates (translates and encodes) information to be sent
through the wire to other networks
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Description
Lecture 1 1. Describe the machine cycle: Fetch the programs instructions are fetched Decode the instructions are decoded (translated), so control unit, APU, FPU can understand them Execute the instructions are carried out Store the original data or result from APU or FPU execution is stored in the CPUs registers 2. Describe the three main components of a computer: CPU central processing unit, does all the calculations Memory stores the instructions for CPU and the results Power supply provides the needed electricity for other components 3. Describe four components of a CPU ALU, FPU perform arithmetic and logical calculations Control Unit in control of everything, instructs other parts what to do Registers hold the result of processing Bus Interface Unit the place where data and instructions enter or leave 4. Describe four different types of storage used in a computer Hard Disk Drives they store the information on magnetic disks Solid State Drives they store information on flash memory Hybrid Disk Drives the symbiosis of HDD and SSD, SSD is cache for increased efficiency Magnetic Tape Drives they store information on a magnetic tape, low cost for megabyte, used commonly in archives 5. Why is it important to have fans in a computer? Because computer components generate heat as current flows through them, so fans help dissipate that heat. The absence of cooling solution will cause severe parts degradation and possible failure.Lecture 2 1. Describe the differences between wired and wireless networks Convenience for wireless networks: can be used in certain range, thus gives mobility, while wired network needs a cable attached to operate Reliability for wired: wireless networks can be interfered or disrupted by weather, walls, other wireless networks in the same range, wired is typically redundant in this sense Security for wired: to interfere and hack into the wired network, you need to be physically attached to a cable, whereas wireless network can be interfered in certain range Cost for wireless: new wireless networks can be deployed easily (using wireless range extenders, towers or satellites), whereas wired needs a cable physically run to a place to operate Speed for wired: wired network has better speed that wireless, as much more data can be transferred in cable. 2. Describe some of the ways we can use to classify networks (by topology, architecture, size) Topology: star, bus, mesh, or combined Architecture: client-server networks Size: PAN (person
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