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Network+ > Messer Notes > Flashcards

Messer Notes Flashcards

1
Q

Non-ephemeral ports

A

Ports 0 through 1023

server or service

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2
Q

Ephemeral ports

A

Temporary ports - Determine in real time by client

1024 through 65535

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3
Q

ICMP

A

Internet Control Message Protocol/PING

not used for data transfer. administrative tool

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4
Q

What are the OSI model layers?

A 
Layer 7 - application
Layer 6 - presentation
Layer 5 - Session
Layer 4 - Transport 
Layer 3 - Network
Layer 2 - Data Link
Layer 1 - Physical
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5
Q

Layer 2

A

Data link Frame
MAC address
Switching Layer

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6
Q

Layer 3

A

Network layer
routing layer
fragments frames

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7
Q

Layer 4

A

TCP/UDP

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8
Q

Layer 5

A

Communication management
Control protocols start, stop, restart
tunneling protocols

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9
Q

Layer 6

A

Character encoding
application encryption SSL/TLS
often combined with application

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10
Q

Layer 7

A

Application
the layer we see
HTTP, FTP

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11
Q

SYN

A

TCP Control Flag

Synchronize sequence numbers

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12
Q

PSH

A

TCP control flag

Push the data to the application without buffering

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13
Q

RST

A

TCP control flag

Reset the connection

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14
Q

FIN

A

TCP control flag

Last packet from the sender

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15
Q

IP fragmentation

A

splitting a frame in order for it to transmit according to the MTU

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16
Q

Star Topology

A

Hub and spoke
All devices connect to central device
Switched Ethernet Network

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17
Q

Ring Topology

A

Token ring
MAN
WAN
Built in fault tolerance

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18
Q

Bus topology

A

Coaxial cable was the bus
single cable connecting all devices
one break link disables entire network

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19
Q

Mesh typology

A

Fully connected/partial connected
redundancy, fault tolerance, load balancing
WAN

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20
Q

Hybrid Topology

A

Most networks are hybrids

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21
Q

Wireless Topology

A

Ad Hoc- one device to another

Mesh Internet wireless

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22
Q

Peer to Peer Network

A

all devices are both clients and servers
low cost
easy to deploy

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23
Q

Client server network

A

All client talks to server, no client to client

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24
Q

LAN

A

local area network
building or group building
Ethernet and 802.11
any slower and it isn’t local

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25
Q

PAN

A

Personal area network
bluetooth
work telemetry

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26
Q

CAN

A

Campus Area network

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27
Q

NAS

A

Network attached Storage
Connect to a shared storage device across the network
File-level access- must change entire gb file if edits are made

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28
Q

SAN

A

Looks and feels like local storage

block-level access- very efficient reading and writing

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29
Q

MPLS

A

Multiprotocol label switching

pushing and popping off label of data

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30
Q

mGRE

A

Multipoint Generic router encapsulation
dynamic mesh VPN builds itself
tunnels are build dynamically on-demand
send data directly instead of hub

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31
Q

SD-WAN

A

Software defined Networking in a WAN

WAN built for the cloud

32
Q

CPE

A

Customer premises equipment

customer prem

33
Q

Smartjack

A

Network interface Unit NIU

built-in diagnostics determines demarc

34
Q

NFV

A

Network function virtualization
replace physical network with virtual version
managed with hypervisor

35
Q

VMM

A

Virtual Machine Manager
hardware management
single console control

36
Q

vSwitch

A

Virtual switch
functionality is similar to physical switch
Port forwarding, link aggregation, port mirroring

37
Q

vNIC

A

virtual machine network interface card

38
Q

Satellite networking

A

-non-terrestrial
high cost
high latency 250 ms up
rain fade

39
Q

DSL

A

ADSL asymmetric digital subscriber line
uses telephone lines
10,000 foot limitation from the central office

40
Q

Cable broadband

A

Broadband transmission across multiple frequencies

41
Q

DOCSIS

A

data over cable service interface specification

type of connectivity for cable broadband

42
Q

Metro-E

A

metro ethernet
connectivity on a small area
connect sites with ethernet

43
Q

RG-6

A

coaxial cable single conductor

44
Q

Twinaxial cable

A

Twins coaxial
10GB
SFP+ cables

45
Q

Multimode fiber

A

light is reflecting through multiple modes

less expensive LED up to 2 km

46
Q

Single- mode

A

smaller core
up to 100km
laser more expensive

47
Q

LC

A

Local connector

two fibers

48
Q

ST

A

Straight tip fiber

bayonet connectors

49
Q

SC

A

Subscriber connector
square connector
fiber

50
Q

MT-RJ

A

mechanical transfer registered Jack

alot of fiber in a small space

51
Q

Return loss

A

light reflected back to the source

52
Q

UPC

A

ultra polish connectors
high return loss
0 degree connector

53
Q

APC

A

Angle polished connector
lower return loss
8 degree angle

54
Q

RJ11

A

6p2C

telephone and DSL connection

55
Q

RJ45

A

8P8C

ethernet

56
Q

F-connector

A

coaxial cable

DOCSIS

57
Q

Media converter

A

OSI layer 1

convert copper to fiber and back again

58
Q

Transceiver

A

transmitter and receiver in one device

59
Q

RX

A

receive side

60
Q

TX

A

transmit side

61
Q

BiDi

A

send and receive over single strand fiber

reduce number of fiber runs by half

62
Q

SFP

A

small form factor pluggable

1Gbits fiber

63
Q

SFP +

A

increase through put 16 Gbits

64
Q

QSFP/QSFP +

A

quad small form factor pluggable
4 times the amount of information
4 gbs
QSFP + 40Gbits

65
Q

Fiber distribution Panel

A

Permeant fiber installation
Fiber ben radius
Breaks when bent too tightly

66
Q

Krone Block

A

europe 110 block

67
Q

BIX

A

punch down block

68
Q

BASE (baseband)

A

Single frequency using the entire medium

69
Q

WDM

A

bidirectional communication

different “colors”

70
Q

CWDM

A

10GBASE-LX4 uses 4 3.125 Gbit carriers at 4 different wavelengths

71
Q

DWDM

A

Multiplex multiple OC carriers into a single fiber

add 160 signals, increase to 1.6Tbits

72
Q

Default Gateway

A

The router that allows you to communicate outside of your local subnet
,ust be and IP address o the local subnet

73
Q

loopback address

A

range 127.0.0.1 to 127.255.255.254

74
Q

Reserved addresses

A

set aside for future testing
240.0.0.1 through 254.255.255.254
class E

75
Q

VIP

A

not associated to physical network adaptor

Virtual machine, internal router address

76
Q

APIPA

A

when DHCP is unavailable
a link-local address
no forwarding by routers
169.254.0.1 through 169.254.255.254

77
Q

NAT overload/PAT

A

router changing ip and port to send to a public address.

10.10.20.50:

Network+ (10 decks)

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