chapter eight Flashcards

1
Q

computer networks

A

two or more computers connected together to communicate and share resources

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2
Q

shared resources

A

computer files, folders, software, peripheral hardware

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3
Q

advantages of a computer network over a stand-alone system are so significant that…

A

businesses cannot compete without a network (even if the business is a sole proprietorship)

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4
Q

clients

A

(what make up a network)

desktops, laptops, smartphones, etc.

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5
Q

server

A

central computer

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6
Q

node

A

every device connected to a network

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7
Q

network advantages:

A
  • economics
  • software
  • collaboration
  • back up
  • internet
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8
Q

peripheral devices

A

printer, scanners, etc.

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9
Q

4 basic components of a network

A
  • network interface controller (NIC)
  • ethernet card/protocol
  • physical cable system
  • network hub
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10
Q

network interface controller (NIC)

A

first component of a network, plugged into motherboard (allows communication)

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11
Q

most computers come “_____ ______”

A

network ready

already come with a NIC

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12
Q

what is the most common NIC?

A

ethernet card

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13
Q

what does an ethernet card provide?

A

a media access control (MAC) address: unique 48 bit address

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14
Q

protocol

A

standard language

allows communication and data transfer between computers

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15
Q

where is protocol installed?

A

the ethernet card

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16
Q

what is the most common physical cable system?

A

ethernet cable

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17
Q

“twisted pair”

A

most common type of cable wire

cancels out electromagnetic forces from other devices and increases reliability

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18
Q

network hub

A

central location of the computer network that serves as a traffic cop for network connection and communication

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19
Q

what is the most common hub?

A

ethernet hub

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20
Q

intranet

A

the business’ private web-based network
clients=employees
protocols=rules

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21
Q

transmission control protocol/internet protocol

A

common network protocol, guarantees the reliability fro end user
packets sent in correct order

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22
Q

packets

A

smaller, more manageable pieces

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23
Q

user datagram protocol (UDP)

A

does not guarantee reliability

streamed data mostly, frames can be lost

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24
Q

OS/platform

A

controls memory, input/output devices, and manages computer files (run with little/no user interaction)

25
network operating system
controls an entire network (responsible for network traffic control, administering packets, file management, administering certain functions (backup, security, etc.)
26
when a new device is attached to a network, the NOS is able to...
recognized it and install it as a part of the network
27
multi-processing
several processes to occur at one time
28
preregistering with the network administrator
the NOS must know who the network end user is going to be
29
network administrator
responsible for smooth network operations, network performance and implementation of new nodes or new network
30
businesses' ______ ______ often determines network access
corporate hierarchy
31
topology
mapping of a physical network and logical connections between nodes
32
nodes examples
computers, hubs, printers, and switches
33
bus topology/linear bus
each of a network's nodes is connected to a common linear back bone that has two endpoints
34
advantages of bus topology
all nodes simultaneously receive data
35
disadvantages of bus topology
if the backbone is down, all nodes are down
36
star topology
center (hub) and spokes (nodes) client/server model MOST COMMON TOPOLOGY
37
disadvantage of star topology
if the central hub fails, every nod fails
38
ring topology
each node is connected to two computers data transmitted in a circular manner LEAST USED
39
advantage of ring topology
when it can't flow one direction, data can try another direction
40
local area network (LAN)
relatively small, typically in a single building (smaller business/smaller parts of a larger business)
41
campus area network (CAN)
connects two or more LANs
42
metropolitan area network (MAN)
connects two or more LANs/CANs within a city or town
43
wide area network (WAN)
encompasses a wide geographical area, connecting LANs/CANs/MANs centralized data airlines (ticket information)
44
dumb terminal
a computer whose sole purpose is to connect to the network and nothing else
45
peer-to-peer networks (P2P)
connect computers directly to one another without the use of a server (easy set up, common for sharing audio/video)
46
internet
largest network connects LANs/CANs/MANs/WANs interconnection of public, private, commercial, industrial, and governmental networks
47
unwanted user
primary threat
48
password
secret word/combination of characters
49
strong passwords
specific amount of characters, numbers, cases, or special characters (mixed result in effectiveness)
50
passphrase
memorable strong password | - ex: Just1Time
51
longevity of a password
how often to reset
52
why must network administrators work close with HR?
to delete terminated employees logins
53
cookie
small program, computer file designed to gather company data and information (potentially undesirable)
54
cached
website content is stored on a user's (client) computers
55
permissions
grant access/restrict specific files
56
firewall
specialized hardware and software that allow only authorized personnel to access an organization's intranet
57
intranet
private version of internet
58
how can employees who telecommute are able to log on to their business' computer network?
access its intranet from home by getting past the company's firewall