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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
SFP and SFP+
Small form factor pluggable Enhanced form factor pluggable
26
QSFP and QSFP+
Quad small form factor pluggable Enhanced quad small form factor pluggable
27
SLAAC
Stateless address autoconfiguration IPv6 self dhcp from MAC
28
FCoE
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
iSCI
Internet small computer systems interface Makes a remote disk look and act like a local disk Like FC
30
GSM
Global system for mobile communications Everyone gets a little slice of time EU standard worldwide coverage Uses SIM cards
31
CDMA
Code Division multiple access Everyone communicates at the same time Each call uses a different code Codes are filtered on each side
32
SNMP OIDs
Object ID
33
SNMP MIBs
Management information bases SNMP database
34
VRRP
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
FHRP
First hop redundancy protocol Configure Backup for the default gateway
36
FC
Fiber channel Usually used for high speed storage networking
37
GRE
Generic routing encapsulation Point to point tunnel
38
RIP
Routing internet protocol Interior protocol Distance vector The metric used to determine the path is hop count Uses split horizon Old slow convergence
39
Split horizon
Prevents routing loops by not sending routing information back to the router it came from
40
OSPF
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
BGP
Border gateway protocol Exterior protocol used to route packet between different networks
42
EIGRP
Enhanced interior gateway routing protocol Interior protocol Hybrid Hybrid protocol combines distance and link state
43
CRC
Cyclic redundancy checksum Detects accidental changes to raw data
44
SONET
Synchronous optical network Fiber network that uses ATM ATM is to SONET, what Ethernet is to copper
45
CSU & DSU
Terminate digital signals at customers location
46
Metro Ethernet
Service provider line ends in a Ethernet on your property, like what we have at home
47
NBSTAT
NetBios statistics
48
PBX
Private branch exchange Is a private telephone network used within a business and can rout calls over internal networks
49
MDF and IDF
Main distribution frame Intermediate distribution frame (For multi floor buildings)
50
DMVPN
Dynamic multipoint VPN Allows internet to be used as a WAN between two different sites instead of buying a dedicated lease line
51
Crossover cable is used for
Two of the same
52
Straight through cable is used for
Two different
53
HSRP
Hot standby router protocol Cisco auto backup router
54
IP helper
DHCP to every device on the network even in different VLANS
55
Asymmetric routing is when…
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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