Chapter 15 - Operating Cisco Routers

Question 1

What are a couple differences in the configuration of routers and switches?

Answer 1

1) The configuration of IP addresses differs in some ways.

2) Routers have an auxiliary (Aux) port, intended to be connected to an external modem and phone line.

Question 2

Each interface on a router has two status codes, what is the names of the 1st status code and what is its general meaning?

Answer 2

It’s the line status, and it refers to the Layer 1 status - for example, is the cable installed, it is the right/wrong cable, is the device on the other end power on?

Question 3

Each interface on a router has two status codes, what is the names of the 2nd status code and what is its general meaning?

Answer 3

Refers generally to the Layer 2 status. It is always down if the line status is down. If the line status is up, a protocol status of down is usually caused by a mismatched data link layer configuration.

Question 4

What’s the line status and protocol status when the interface has a shutdown command configured on it?

Answer 4

Administratively down - Down

Question 5

What’s the line status and protocol status when the interface is not shutdown, but the physical layer has a problem? For example, no cable has been attached to the interface, or with Ethernet, the switch interface on the other end of the cable is shut down or the switch is powered off?

Answer 5

Down - Down

Question 6

What does a line status of Up and a Protocol Status of Down almost always refer to?

Answer 6

Refers to data link layer problems, most often configuration problems.

Question 7

What does it mean if the line status is Up and the Protocol status is Up?

Answer 7

Layer 1 and Layer 2 of this interface are functioning.