Switches vs. Hubs
A hub sends incoming data out to every connected device, whereas this device uses a MAC address table to forward traffic to a specific destination.
What is a switch?
The port type used to connect an end-user device, like a PC, to a single VLAN.
What is an access port?
The maximum speed of a Fast Ethernet switch.
What is 100 Mbps?
The technique where a switch reads the destination MAC address and immediately starts forwarding the frame, reducing latency.
What is cut-through switching?
The type of message switches send to each other to exchange STP information and elect a root bridge.
What is a Bridge Protocol Data Unit (BPDU)?
The broadcast domain and collision domain for a hub are both this, meaning all connected devices share bandwidth and hear all traffic.
What is a single one?
The port type used to connect switches together or connect a switch to a router, carrying traffic for multiple VLANs.
What is a trunk port?
The transfer speed, in Mbps or Gbps, offered by a Gigabit Ethernet switch.
What is Gigabit Ethernet speed? (1000 Mbps or 1 Gbps)
A switch using this technique reads the entire frame into a memory buffer before forwarding, enabling error detection.
What is store-and-forward switching?
A managed switch can create this, which is an isolated network segment, to enhance security by limiting communication between devices.
What is a Virtual Local Area Network (VLAN)?
This layer of the OSI model is where a hub operates, simply repeating electrical signals.
What is Layer 1?
A dedicated high-speed port used to connect a switch to a higher-level device, like another switch or a router.
What is an uplink port?
This technology uses multiple switch ports to aggregate bandwidth and provide a redundant link, and is also called port trunking.
What is link aggregation?
A switch populates this table, which maps a MAC address to a specific port, to make forwarding decisions.
What is a MAC address table?
This STP role is assumed by the switch with the lowest Bridge ID, serving as the central point for the spanning tree topology.
What is a root bridge?
A hub is a half-duplex device, meaning data can only move in this single direction at a time.
What is a single direction or half-duplex?
Unlike a Layer 2 switch, this type of switch can perform routing functions and forward traffic between different VLANs.
What is a Layer 3 switch?
A managed switch helps mitigate this risk, which is a single component failure causing the entire network to stop working.
What is a single point of failure?
The action a switch takes when it receives a frame for a MAC address not yet in its table
What is to flood the frame out of all ports?
A managed switch feature that limits the number of MAC addresses that can connect to a port to prevent unauthorized access.
What is port security?
This is the result of multiple devices on a hub attempting to transmit data simultaneously, which decreases network performance.
What is a collision?
A managed switch typically offers this command-line or web-based interface for configuration, while an unmanaged switch does not.
What is a command-line or web-based interface?
This protocol prevents switching loops from occurring by putting redundant paths into a blocking state.
What is the Spanning Tree Protocol (STP)?
The aging time for entries in a switch's MAC address table is the time they remain active before being deleted if they are not used.
What is aging time?
The name of the STP port state in which a switch port is a part of a loop and does not participate in frame forwarding.
What is a blocking state?