Ethernet Flashcards
Ethernet is defined by what network standard?
IEEE 802.3
FCS stands for:
Frame Check Sequence
Ethernet frame never changes
Norma Clatures are:
10BaseT
10 - stands for the speed
Base is only one channel / Broad multiple channels like TV
5 - Length ( 500 meters )
T unshielded Twisted pair with a switch in the middle
Ethernet Frames contain all of the following:
PDSDTDF
Preamble/Dest mac/ Source mac/Data Type/Data/ FCS
Preamble is
1’s and 0’s
What part of the frame tells you what type of data is being sent in the frame:
Data Type
What is the minimum amount of “Data” an ethernet frame can carry?
64 bytes
If “Data” is below 64 bytes then what is used so the frame will be sent?
a Pad
What is the maximum amount of “Data” an ethernet frame can carry?
1522 bytes
What can push an ethernet frame up to 9000 bytes of “Data”:
Jumbo Frame ( High Speed network)
MTU stands for what?
Maximum Transmission Unit - 1522 bytes
What is used for error detection in an ethernet frame?
FCS ( Frames Check Sequence )
568A on one end and 568 B on the other end creates what kind of cable?
Crossover Cable
Most common network cable and uses 568B on both ends is called what kind of cable?
Straight Through Cable
Technical name for a RJ-45 connector is:
8P8C
CSMA/CD stands for:
Carrier Sense Multiple Access / Collision Detection
Eats data at the end of a cable like on a 10Base5 and 10Base2 is:
Terminate Resistor
Who came up with Token Ring?
IBM
What Noman Clayture has:
10 mb a second
100 meters between Nodes / Hubs
Maximum of 1024 Nodes per Switch
Only Cat 3 or better UTP can be used
10BaseT is basically a hub
What type of network hardware:
recreate frames for every computer
Uses CSMA/CD
Collision Domain
Everyone can hear collisions
Hubs or Multiple Port Repeater
Switch uses Mac addresses or point to point connections and uses what type of domain?
Broadcast Domain
Two way communication or one at a time is what mode:
Half-Duplex
Computers talk all the time / like a phone is what mode:
Full-Duplex
100BASET4 uses:
Cat3 Cable
100 MBPS
1024 Hubs
100 meters from base to each hub
1st to use 4 pairs
Now Obsolete
100BASETX uses:
Cat5e Cable
100 MBPS
1024 nodes
100 meters from base to a node
Uses only 2 pairs
100BASET uses:
is todays standard, basically 100BaseT
100BASEFX uses:
Multimode
100 MBPS
1024 nodes
2 KM using multimode fiber and switches
What type of cable can you plug into any port of a switch to switch:
Crossover Cable
What type of cable would you use from a standard switch port to UPLINK ports?
Straight Through Cable
What is the port actually called once you push or use the UPLINK button/port on a switch?
Medium Dependent Interface Crossover ( MDI-X )
Most modern switches use autosensing ports that can use straight through cables and that is called:
Auto Medium Dependent Interface Crossover ( Auto-MDI-X )
By plugging cables from switch to switch back to switches causing the network to crash is called a :
Switching Loop
This sends frames or Bridge Protocol Data Units ( BPDU’s) to prevent Switching loops from happening by assigning switches as number 1 or number 2 or number 3.
Spanning Tree Protocol
Switches use ______ to obtain MAC addresses
ARP (Address Resolution Protocol)
What layer does a switch operate at:
Layer 2 unless its a Layer 3 switch
CSMA/CA stands for
collision avoidance
