Network Basics

Question 1

the 5 9’s

Answer 1

99.999% availability

5 minutes of downtime/ year

Question 2

converged networks

Answer 2

combining multiple types of traffic: data, video and voice

Question 3

client

Answer 3

end-user device to access network

Question 4

server

Answer 4

provides resources to the rest of the network

email, file, web print servers

Question 5

hub

Answer 5

old tech
just repeats signal to all ports
more network errors

Question 6

wap

Answer 6

wireless access point

allows wireless device to connect to wired network

Question 7

switch

Answer 7

layer 2
forward traffic based on mac address
more security and efficiently use bandwidth

Question 8

router

Answer 8

layer 3
connects 2 different networks
forwards traffic based on ip addresses

Question 9

media

Answer 9

connects 2 devices physically

copper, fiber, radio waves

Question 10

wan link

Answer 10

wide area network link
physically connects networks to wan networks
leased lines, dsl, cable, etc..

Question 11

client-server model

Answer 11

uses a dedicated server to provide resources
central admin, easier management, better scalability
costs more, dedicated resources and OS

Question 12

p2p

Answer 12

peer-to-peer
everyone shares resources with each other directly
lower cost, no dedicated resources
bad management, poor scalability, bruh backups

Question 13

pan

Answer 13

personal area network
smallest type
few meters
Bluetooth, usb hard drive, firewire

Question 14

lan

Answer 14

local area network
100 meters
ethernet or wifi

Question 15

ieee 802.3

Answer 15

ethernet

Question 16

ieee 802.11

Answer 16

wifi

infrastructure or ad hoc

Question 17

can

Answer 17

campus area network
square miles and buildings
connects building-centric lans across uni or business park

Question 18

man

Answer 18

metropolitan area network
25 mile radius
scattered locations across a city
uni with multiple campuses, city departments

Question 19

wan

Answer 19

wide area network
world
leased lines and vpns tunneled over internet
internet, international corporate networks

Question 20

physical topology

Answer 20

how devices are physically connected by media

Question 21

logical topology

Answer 21

how traffic flows through network

Question 22

bus topology

Answer 22

single cable that each device taps into

single collision domain

Question 23

ring topology

Answer 23

cable in circular loop
travels in single direction
fddi - fiber network with 2 redundant rings
token ring - wait to communicate by passing token

Question 24

star topology

Answer 24

most popular lan
devices connect to single point
ethernet, wireless, fiber
if central fails, network fails

Question 25

hub-and-spoke topology

Answer 25

star with wan links

Question 26

full-mesh topology

Answer 26

most redundant
every node connects to every other node
expensive
all optimal routes

Question 27

partial-mesh topology

Answer 27

mix of full-mesh and hub-and-spoke
optimal routes for some sites
consider traffic patterns

Question 28

infrastructure mode

Answer 28

most common wireless network topology

wap as central point like star

Question 29

ad hoc mode

Answer 29

decentralized wireless network
p2p connections made on the fly
no routers or access points

Question 30

wireless mesh topology

Answer 30

interconnection of different types of devices
reliable and redundant
different radio frequencies to expand

Question 31

bluetooth

Answer 31

low energy variant of bluetooth that allows for mesh network

Question 32

rfid

Answer 32

radio frequency id

use electromagnetic fields to read data embedded in tags

Question 33

nfc

Answer 33

near field communication

4cm range

Question 34

ir

Answer 34

infared

operates with line of site

Question 35

z-wave

Answer 35

short range, low latency, low power consumption

home automation

Question 36

ant+

Answer 36

collection and transfer of sensor data

used with remote control systems