Ethernet Fundamentals Flashcards
Spanning Tree Protocol
IEEE 802.1D Permits redundant links so that we don’t have loop backs
Broadcast Storms
Switches pass a packet back and forth forever and consume resources.
Root Device
STP - The Reference point for the entire spanning tree
BID
How to select Root Device in STP. BID is made up of a priority value and a MAC Address Looks for lowest value
Root Port
All non-root bridges will need a root port. Closest to the root bridge in terms of cost , cost is measured by cable speed, ie CAT 5 or CAT 7 . If they are all the same then we choose the lowest port number
Designated Ports
Used to transmit data
Non-Designated Ports
These ports will not forward traffic But they will receive bridge protocol data units, will start to transmit if a link in the topology goes down
Forwarding State or non-designated ports
Blocking, Listening, Learning, Forwarding
VLAN Trunking
802.1q Multiple VLAN’s transmitted over the same physical cable
10BASE5
Coax 10Mbps 500m
10BASE2
Coax 10Mbps 185m
10BASE-T
Cat 3 or High UTP 10 Mbps 100m
100BASE-TX
CAT 5+ UTP 100mbps 100m
100BASE-FX
MMF 100 Mbps 2km
1000BASE-T
Cat 5e UTP 1 Gbps 100m
1000BASE-TX
Cat 6 1 Gbps 100m
1000BASE-LX
SMF 1 Gbps 5km
1000BASE-SX
MMF 1 Gbps 550m
1000BASE-LH
SMF 1 Gbps 10km
1000BASE-ZX
SMF 1Gbps 70km
10GBASE-SR
MMF 10 Gbps 26m - 400m
10GBASE-LR
SMF 10 Gbps 10-25 km
10GBASE-ER
SMF 10 Gbps 40 km
10GBASE-SW
MMF 10 Gbps 300m
