Ch 3.1 Flashcards
What’s EUI?
Extended Unique Identifier. AKA MAC address
SFP (+)
What’s it stand for?
What connector does it use?
What’s the + mean?
Small form factor pluggable
LC Connector
Can use up to 10 GbE
MSA.
What’s it mean?
Why is it important?
Multi-Source Agreement
Ensure compatibility between different Vendors.
QSFP (+)
What’s it stand for?
What does it do?
What’s the + capable of?
Quad Small FF Pluggable
Aggregates 4 x 1 Gbps to a single 4 gbps channel
The + can do 4 x 10 Gbps to a single 40 GbE
Transceivers designed for SMF
What does SMF stand for?
What lighting technology does it use?
SMF = Single Mode Fiber
Uses Laser Diodes
Transceivers designed for MMF
What does MMF stand for?
What does it use?
Multi Mode Fiber
LED’s or VCSEL
What are standard sizes transceivers use for optical wavelengths?
850, 1300, or 1550 nm
Duplex uses what 2 strands?
Tx (Transmit)
Rx (Receive
Parallel uses how many strands typically?
8 or 20
WDM
What’s it stand for?
What does it do?
Wavelength Division Multiplexing
Let’s multiple data streams be used in 1 optical fiber using different wavelengths
What is Optical Link budget?
Amount of acceptable loss
What is Attenuation?
Signal loss over length of cable
How much loss is rated for connecting Fiber cables?
.75 dB
What is does splice mean?
How much signal loss is budgeted for splicing?
Mechanical vs Fusion
What is mechanical vs fusion?
Act of joining 2 cables together.
1 dB for mechanical (align fibers) and .3 dB for fusion (welds fibers))
What are the 7 parts of an Ethernet Frame?
Preamble
SFD (Start Frame Delimiter)
Destination MAC
Source MAC
Ether Type
Payload
FCS (Frame Check Sequence)
What does SFD mean in Preamble?
What is the preamble for?
What is the preamble made of?
What protocol does it use?
Start Frame Delimiter
Used to identify collisions
8 bytes with 2 consecutive 1s at the end
Uses CSMA/CD protocol
(Carrier Sense Multiple Access with Collision Detection
EtherType
What is it for?
What does EtherType values greater than 0x0600 stand for?
What does less than 0x0600?
Indicates type of protocol in the frame’s payload
Greater than stands for type of protocol
Less than stands for payload length
What doe FCS mean?
How big is the FCS?
What is this for?
Frame Check Sequence.
32-bit (4 bytes)
Detects errors in the frame.
MAC address
How many bits are they?
How are MAC addresses notated?
48-bit
6 groups of 2 hexadecimals by colon/hyphen/no separators
What is a Burned-In Address?
What other name does it have?
How is it organized?
What does OUI stand for?
Range of addresses uniquely given by IEEE
Universal Address
First six hex decimals identify the manufacturer
Organizationally Unique Identifier
What is a broadcast address?
How is it specified?
Sends a frame to a group.
MAC address of all 1s or ff:ff:ff:ff:ff:ff:ff
What is a unicast transmission?
Frame is sent to individual host
QSFP (+)
What’s it used with?
How’s it terminated?
What standard is it used with?
It’s used with parallel fiber.
Terminated with MPO (Multi-Fiber Push On)
Uses Wavelength Division Multiplexing (WDM) Ethernet Standards (Send multi streams of data in 1 direction)
