Network/Data Flow

Question 1

why use a network?

Answer 1

communication
share resources
security/backup/collaboration

Question 2

what is a network?

Answer 2

a telecommunication made up of a collection of computers used to transfer data between endpoints using a variety of mediums and software

Question 3

network types

Answer 3

wired
wireless
radio
infared (remote)

Question 4

wired network

Answer 4

Ethernet: direct connection

pro: secure, speed is all yours
con: stuck to Ethernet port

Question 5

wireless network

Answer 5

pro: convenient
con: unsecure, speed affected by other users’ speed and large influx of other users

Question 6

ad hoc network

Answer 6

> = 2 devices
easy to set up and disassemble
limited resources, 1 person leaves their resources leave too

Question 7

LAN

Answer 7

local area network
devices connected with network equipment
requires planning and equipment
stable resources

Question 8

MAN

Answer 8

municipal area network
covers a particular geographical area
consists of multiple LANs

Question 9

WAN

Answer 9

wide area network
covers large geographical area
made of multiple LANs

Question 10

NFC

Answer 10

near field communications
short range wireless, send and receive
ex: paying with phone, tap to pay

Question 11

TCP/IP

Answer 11

uses ip addresses to direct and send data
connection oriented/reliable
data kept in order

Question 12

UDP

Answer 12

connectionless/unreliable

data sent out of order

Question 13

data flow

Answer 13

data broken into packets and broken up farther in network, reassembled at destination
data sent between devices

Question 14

equipment

Answer 14

dce
dte
cabling
network card
hub
switch
router
hybrid

Question 15

DTE

Answer 15

endpoints, sends and receives data

ex: pc, cellphone

Question 16

DCE

Answer 16

connects endpoints and directs data through the network

ex: hubs, switches, routers

Question 17

cabling

Answer 17

connects DTEs and DCEs
Ethernet (solid, plenum, stranded)
Fiber Optics

Question 18

ethernet

Answer 18

max distance of 333 ft
can be extended every 333 ft by a hub, max 3
solid: for longer distances
plenum: fire rated, ceilings and walls
stranded: short distance, loses signal

Question 19

fiber optic

Answer 19

uses glass and lights
can go for miles (10-20mi)
single mode and multi mode

Question 20

cable speeds

Answer 20

cat5: <=1 Gb/s
cat6: 1-10Gb/s
cat7: 10-100Gb/s

Question 21

network card

Answer 21

gate keeper
basic error checking (is data for me?)
uses unique mac address
provides: communication, encapsulation/encapsulation, CRC check 46 bytes
Wired
Wireless

Question 22

f

Answer 22

f

Question 23

wired network card

Answer 23

secure

bandwidth and speed all yours

Question 24

wireless network card

Answer 24

unsecure: anyone can see

bandwidth and speed shared

Question 25

Hub

Answer 25

extend wireless connections

broadcasts traffic to ALL and remembers NOTHING

Question 26

switch

Answer 26

uses mac addresses to make a table of connections
each packet inspected for destination
can only talk to connected devices
unmanaged = plug and play
managed = advanced, customizable

Question 27

router

Answer 27

uses IP addresses to communicate
gateway between networks: inspects every package
understands internal and external protocols

Question 28

hybrid

Answer 28

router and switch