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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
PAN
Personal area network bluetooth work telemetry
26
CAN
Campus Area network
27
NAS
Network attached Storage Connect to a shared storage device across the network File-level access- must change entire gb file if edits are made
28
SAN
Looks and feels like local storage | block-level access- very efficient reading and writing
29
MPLS
Multiprotocol label switching | pushing and popping off label of data
30
mGRE
Multipoint Generic router encapsulation dynamic mesh VPN builds itself tunnels are build dynamically on-demand send data directly instead of hub
31
SD-WAN
Software defined Networking in a WAN | WAN built for the cloud
32
CPE
Customer premises equipment | customer prem
33
Smartjack
Network interface Unit NIU | built-in diagnostics determines demarc
34
NFV
Network function virtualization replace physical network with virtual version managed with hypervisor
35
VMM
Virtual Machine Manager hardware management single console control
36
vSwitch
Virtual switch functionality is similar to physical switch Port forwarding, link aggregation, port mirroring
37
vNIC
virtual machine network interface card
38
Satellite networking
-non-terrestrial high cost high latency 250 ms up rain fade
39
DSL
ADSL asymmetric digital subscriber line uses telephone lines 10,000 foot limitation from the central office
40
Cable broadband
Broadband transmission across multiple frequencies
41
DOCSIS
data over cable service interface specification | type of connectivity for cable broadband
42
Metro-E
metro ethernet connectivity on a small area connect sites with ethernet
43
RG-6
coaxial cable single conductor
44
Twinaxial cable
Twins coaxial 10GB SFP+ cables
45
Multimode fiber
light is reflecting through multiple modes | less expensive LED up to 2 km
46
Single- mode
smaller core up to 100km laser more expensive
47
LC
Local connector | two fibers
48
ST
Straight tip fiber | bayonet connectors
49
SC
Subscriber connector square connector fiber
50
MT-RJ
mechanical transfer registered Jack | alot of fiber in a small space
51
Return loss
light reflected back to the source
52
UPC
ultra polish connectors high return loss 0 degree connector
53
APC
Angle polished connector lower return loss 8 degree angle
54
RJ11
6p2C | telephone and DSL connection
55
RJ45
8P8C | ethernet
56
F-connector
coaxial cable | DOCSIS
57
Media converter
OSI layer 1 | convert copper to fiber and back again
58
Transceiver
transmitter and receiver in one device
59
RX
receive side
60
TX
transmit side
61
BiDi
send and receive over single strand fiber | reduce number of fiber runs by half
62
SFP
small form factor pluggable | 1Gbits fiber
63
SFP +
increase through put 16 Gbits
64
QSFP/QSFP +
quad small form factor pluggable 4 times the amount of information 4 gbs QSFP + 40Gbits
65
Fiber distribution Panel
Permeant fiber installation Fiber ben radius Breaks when bent too tightly
66
Krone Block
europe 110 block
67
BIX
punch down block
68
BASE (baseband)
Single frequency using the entire medium
69
WDM
bidirectional communication | different "colors"
70
CWDM
10GBASE-LX4 uses 4 3.125 Gbit carriers at 4 different wavelengths
71
DWDM
Multiplex multiple OC carriers into a single fiber | add 160 signals, increase to 1.6Tbits
72
Default Gateway
The router that allows you to communicate outside of your local subnet ,ust be and IP address o the local subnet
73
loopback address
range 127.0.0.1 to 127.255.255.254
74
Reserved addresses
set aside for future testing 240.0.0.1 through 254.255.255.254 class E
75
VIP
not associated to physical network adaptor | Virtual machine, internal router address
76
APIPA
when DHCP is unavailable a link-local address no forwarding by routers 169.254.0.1 through 169.254.255.254
77
NAT overload/PAT
router changing ip and port to send to a public address. | 10.10.20.50:

Network+ (10 decks)

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