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Network+ > Acronyms > Flashcards

Acronyms Flashcards

1
Q

LACP

A

Link Aggregation Control Protocol

Combines multiple lines to make one fat line so you don’t have a bottle neck in the network

Like if everyone is using 1g lines you don’t want the one line coming in to be a bottle neck so you could combine 4 to make one 4g line

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2
Q

WINS

A

Windows Internet Name Service

DNS inside a windows domain

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3
Q

MTU

A

Maximum Transmission Unit

How large a packet can be
1500 by default for Ethernet

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4
Q

SDWAN
DYNAMIC ROUTING

A

Software defined wide area network

Used for easier access cloud services in an enterprise environment.

We can use software to direct traffic directly to the resource needed instead of having to route all the traffic through a central data center first

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5
Q

NAS SAN

A

Network attached storage
Storage area network

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6
Q

MPLS

A

Multiprotocol label switching

High performance technology that uses “labels” to define a short path for traffic to take rather than traditional routing tables

Can be used to optimize network traffic

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7
Q

mGRE
Emphasis on the MULTIPOINT
(a type of WAN connection)

A

Multipoint generic routing encapsulation

Allows a single router to tunnel with multiple routers instead of having one router for each remote site at the main office

Used for DMVPN to dynamically build tunnels and tear them down when not needed

Each remote site can tunnel to other remote sites instead of having to go through the main office first, makes networks much more efficient

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8
Q

NFV

A

Network function virtualization

Replaces physical network devices with virtual ones

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9
Q

ISDN

A

Integrated services digital network

Allows for the transmission of voice and data over phone lines at the same time

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10
Q

PSTN

A

Public switched telephone network

POTS

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11
Q

Frame relay

A

Virtual circuits and point to multi point connections

Used to connect multiple branch offices back to a main office

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12
Q

IBSS

A

Independent basic service set
Ad hoc Wireless

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13
Q

BSS

A

Basic service set

All devices connect to single WAP

Infrastructure mode

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14
Q

ESS

A

Extended service set

Devices connect to multiple WAPs

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15
Q

Mesh topology

Wireless service

A

Like ESS except using multiple technologies

Eg microwave, satellite, Wi-Fi etc. 

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16
Q

ISAKMP

A

Internet security alliance key management protocol

Manages keys for vpns mostly IPsec

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17
Q

OTDR

A

Optical time domain reflectometer

Tells you how far into a fiber cable is a break

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18
Q

RSSI

A

Received signal strength indication

Strength of the wireless signal being received

Measured in negative numbers
Closer to zero is stronger

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19
Q

EIRP

A

Effective isotropic radiated power

Measured in dBi
Amount of power output by the antenna

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20
Q

CCA

A

Clear channel assessment

WiFi checks to see if the channel is clear to avoid collisions

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21
Q

CSMA/CD and CSMA/CA

A

Collision detections
Collision avoidance

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22
Q

WDM

A

Bidirectional Wavelength division multiplexing

Send data both directions down a fiber cable

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23
Q

CWDM

A

Coarse wavelength division multiplexing

Less dense multiplexing

24
Q

DWDM

A

Dense wavelength division multiplexing

Most dense multiplexing

25
Q

SFP and SFP+

A

Small form factor pluggable
Enhanced form factor pluggable

26
Q

QSFP and QSFP+

A

Quad small form factor pluggable
Enhanced quad small form factor pluggable

27
Q

SLAAC

A

Stateless address autoconfiguration

IPv6 self dhcp from MAC

28
Q

FCoE

A

Fiber channel over Ethernet

A FC switch is just a very fast SAN switch (can be copper too)

CONVERGENCE of fiber storage traffic and Ethernet data into a single Ethernet network

29
Q

iSCI

A

Internet small computer systems interface

Makes a remote disk look and act like a local disk

Like FC

30
Q

GSM

A

Global system for mobile communications

Everyone gets a little slice of time
EU standard worldwide coverage
Uses SIM cards

31
Q

CDMA

A

Code Division multiple access

Everyone communicates at the same time
Each call uses a different code
Codes are filtered on each side

32
Q

SNMP OIDs

A

Object ID

33
Q

SNMP MIBs

A

Management information bases

SNMP database

34
Q

VRRP

A

Virtual router redundancy protocol

Virtual ip for the default gateway
Have backup routers that seamlessly take over the IP if the main fails

FOR LAN SIDE

35
Q

FHRP

A

First hop redundancy protocol

Configure Backup for the default gateway

36
Q

FC

A

Fiber channel

Usually used for high speed storage networking

37
Q

GRE

A

Generic routing encapsulation

Point to point tunnel

38
Q

RIP

A

Routing internet protocol

Interior protocol
Distance vector

The metric used to determine the path is hop count

Uses split horizon

Old slow convergence

39
Q

Split horizon

A

Prevents routing loops by not sending routing information back to the router it came from

40
Q

OSPF

A

Open shortest path first

Interior protocol
Link state

Uses a “cost” metric to send data over the path with the most bandwidth

Fact convergence

Authentication

41
Q

BGP

A

Border gateway protocol

Exterior protocol

used to route packet between different networks

42
Q

EIGRP

A

Enhanced interior gateway routing protocol

Interior protocol
Hybrid

Hybrid protocol combines distance and link state

43
Q

CRC

A

Cyclic redundancy checksum

Detects accidental changes to raw data

44
Q

SONET

A

Synchronous optical network

Fiber network that uses ATM

ATM is to SONET, what Ethernet is to copper

45
Q

CSU & DSU

A

Terminate digital signals at customers location

46
Q

Metro Ethernet

A

Service provider line ends in a Ethernet on your property, like what we have at home

47
Q

NBSTAT

A

NetBios statistics

48
Q

PBX

A

Private branch exchange

Is a private telephone network used within a business and can rout calls over internal networks

49
Q

MDF and IDF

A

Main distribution frame

Intermediate distribution frame
(For multi floor buildings)

50
Q

DMVPN

A

Dynamic multipoint VPN

Allows internet to be used as a WAN between two different sites instead of buying a dedicated lease line

51
Q

Crossover cable is used for

A

Two of the same

52
Q

Straight through cable is used for

A

Two different

53
Q

HSRP

A

Hot standby router protocol

Cisco auto backup router

54
Q

IP helper

A

DHCP to every device on the network even in different VLANS

55
Q

Asymmetric routing is when…

A

Traffic leaves and returns through a different path on the network

Can cause issues with statefull or packet inspection firewalls

Network+ (4 decks)

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