4.5: Components of LAN (Doshi) Flashcards

1
Q

OSI Layer and devices

A

The higher the layer, more intelligent the devices will be.

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2
Q

At which OSI layer Hub and repeater operate

A

Hub & repeater are usually called dumb devices.

They operate at the physical layer or layer 1

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3
Q

At which OSI layer switch & bridge operate

A

Switches and bridges have more capability than hub. They operate at the Datallink layer or layer 2

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4
Q

At which OSI layer Routers operate

A

Routers have more capability than switch & bridge .They operate at the Network layer or layer 3

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5
Q

At which OSI layer gateway operate

A

They operate at the application layer or layer 7. They are the most intelligent device.

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6
Q

Repeater

A

an electronic device that receives a signal and

re-transmits it.

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7
Q

what are repeater used for :

A

Repeaters are used to extend transmissions so that the signal can cover longer distances or be received on the other side of an obstruction

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8
Q

Hub roles

A

Connect many devices together for exchange of data. Hub broadcast message to all connected devices.

Collisions occur commonly in setups using Hubs
HUB cannot learn or store MAC address

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9
Q

Switch

A

Is more advanced/intelligent version of a hub. Switch sends message to only required device.

No collusion occurs in full duplex switch
Switch store MAC addresses in a lookup up table

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10
Q

Bridge

A

contains few ports of LAN connectivity . Has the capacity to store frames and act as storage and forward devices.

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11
Q

Router

A

Connect two separate networks

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