yes
Star Topology, where Hubs can act as repeaters.
Repeaters and Hubs
10
All network devices have some component that operates at layer 1. Only hubs and repeaters operate entirely at layer 1.
Bridges send information (data) to the specified destination, whereas hubs and repeaters do not.
Bridges send information (data) to the specified destination, whereas hubs and repeaters do not.
􀂾File Servers 􀂾Workstations 􀂾Network Interface Cards 􀂾Modems 􀂾Repeaters 􀂾Concentrators/Hubs 􀂾Transreceivers 􀂾Switches 􀂾Bridges 􀂾Multiplexer 􀂾Routers
Hubs and repeaters operate at the Physical Layer of the OSI Model. The Physical Layer is the first layer of the OSI Model.
Passive Hubs These hubs are nothing more than point contacts for the wires that make up the physical network. An example of this would be a punchdown block that is a simple plastic, unpowered box used to plug network cables into it. Active Hubs Active hubs are a little smarter than the passive hubs we saw. All You might also come across the term "concentrators" which are basically active hubs, concentrating and strengthening a signal as it enters and exits the hub.
On a standard Ethernet network, between any two devices that communicate (such as computers), you can't have more than 4 repeaters (this includes hubs). "5-4-3" refers to a maximum of 5 segments; 4 repeaters; 3 segments with hosts on them.
No. Only protocols that users can see on their screen are considered Presentation Layer based. Hubs and repeaters operate on the physical layer, because it doesn't do anything with the data, it simply forwards it.
Repeaters and hubs