Lesson 3: Installing and Configuring Networks Flashcards
Multiport repeater
Regenerate and repeat incoming transmissions over all ports except source port
Bridges
Legacy ethernet devices used to segment networks and reduce contention
Ethernet Switch
Layer 2
24 or 48 ports
establishes p2p links between nodes
Micro-segmentation
Port buffer
Holds frames until they can be processed
MAC Address Table
Entries are timed-out if no traffic is received
Power Over Ethernet (PoE)
Supplies electrical power to devices over Ethernet cable
Spanning Tree Protocol (STP)
Prevents switching (and Layer 2) loops by designating a single active path from any one device to the one designated as the root bridge
When do broadcast storms occur?
When switches keep receiving the same broadcast and re-broadcast them continually
What is port mirroring used for?
Copies traffic to monitor port
Used for:
Network monitoring
IDSs)
Difference between managed/unmanaged switch?
Managed switches can be configured
Two forms of STP
STP = Legacy RSTP = RapidSTP/Current
What is Physical Topology?
The placement of nodes and media links between them
What is Logical Topology?
The flow of data
Bus topology
Nodes attached to same cable segment
Cabled bus is practically obsolete
Any failure in the bus is a complete failure
Star topology
Endpoint nodes connected via a central forwarding node (hub, switch, router)
Central node can be a single point of failure
