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Discovering computer networks: hands on in the Open Networking Lab
Discovering computer networks: hands on in the Open Networking Lab

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6.1 Switching

In this part you will see how a home gateway acts as a switch to connect devices on a home network.

Now watch the video below, which is about 2 minutes long.

Switching

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The home gateway incorporates a switch that connects devices within the LAN, using either wired or wireless connections. The gateway itself has an IP address on the LAN, usually set up to a known default value.

Activity 1 Test yourself

An ISP may send out thousands of similar home gateways to its customers. Can they all be given the same LAN IP address?

a. 

Yes.


b. 

No.


The correct answer is a.

Answer

Home networks are set up with addresses in a private range (often IP addresses starting 192.168.0.0) so it doesn’t matter if gateways in different networks have the same address. Each home network will only have a single gateway.