2.7 Routers

1) In which OSI level do routers work?

• One

• Two

• Three

• Seven

2) What do we use IP addresses for?

• To identify devices in a LAN

• To identify devices in a company

• To identify devices in Internet

• To identify devices in general

3) How many MAC addresses does each network card have?

• One

• Two or more

• It depends on the type of card

• Network cards don't have MAC addresses

4) Which interconnection element allows pass from a street to another one in the example of the city?

• Router

• Hub

• Switch

• Repeater

5) In the example, what is similar to a street?

• A router

• A network

• A hub

• A host

6)   And what is similar to a house?

• A router

• A network

• A host

• A hub

7) What are network masks for?

• To identifiy a device in Internet

• In a IP address to distinguish the part of the network and the host

• In a MAC to distinguish the part of the manufacturer and the host

• To send packets to routers