ICND1 100-105 Part V /
Complete Study Guide Q&A
Question Answer
Use ip address command on the
Adding an IP address to a router
interface for a router, and on a
interface, vs a switch interface.
VLAN for a switch.
Port found on a router to connect into a
modem and phone line allowing Auxillary port. Switches do not
administrators remote control by dialing have auxillary ports.
in to the router.
Routers have a default setting
Router defaults for telnet and SSH.
transport input none.
Interface status codes and their
meanings: Refers to the layer 1 status.
For example, is the cable installed, is it
Line status
the correct cable, is the device on the
other end powered on? (first status
code)
Interface status codes and their Protocol status
meanings: Refers generally to the Layer 2
, status. It is always down if the line status
is down. If line status is up and this is
down it's usually caused by a
mismatched datalink configuration.
(second status code)
Typical Combinations of Interface Status The interface has the shutdown
Codes: Administratively down, down. command configured on it.
The interface is not shutdown, but
the physical layer has a problem.
Typical Combinations of Interface Status
(No cable, port on the other end
Codes: down, down
of the cable is shut down or
neighboring device is powered off.
Almost always refers to a data link
layer problem, most often a
configuration problem. For
Typical Combinations of Interface Status
example, serial links have this
Codes: Up, down
combination when one router was
configured to use PPP and the
other defaults to HDLC.
Typical Combinations of Interface Status Layer 1 and Layer 2 of this
Codes: Up, up interface are functioning.
Key commands to List Router Interface
Status: Lists a single line of output per
show ip interface brief
interface including the IP address and
interface status.
Complete Study Guide Q&A
Question Answer
Use ip address command on the
Adding an IP address to a router
interface for a router, and on a
interface, vs a switch interface.
VLAN for a switch.
Port found on a router to connect into a
modem and phone line allowing Auxillary port. Switches do not
administrators remote control by dialing have auxillary ports.
in to the router.
Routers have a default setting
Router defaults for telnet and SSH.
transport input none.
Interface status codes and their
meanings: Refers to the layer 1 status.
For example, is the cable installed, is it
Line status
the correct cable, is the device on the
other end powered on? (first status
code)
Interface status codes and their Protocol status
meanings: Refers generally to the Layer 2
, status. It is always down if the line status
is down. If line status is up and this is
down it's usually caused by a
mismatched datalink configuration.
(second status code)
Typical Combinations of Interface Status The interface has the shutdown
Codes: Administratively down, down. command configured on it.
The interface is not shutdown, but
the physical layer has a problem.
Typical Combinations of Interface Status
(No cable, port on the other end
Codes: down, down
of the cable is shut down or
neighboring device is powered off.
Almost always refers to a data link
layer problem, most often a
configuration problem. For
Typical Combinations of Interface Status
example, serial links have this
Codes: Up, down
combination when one router was
configured to use PPP and the
other defaults to HDLC.
Typical Combinations of Interface Status Layer 1 and Layer 2 of this
Codes: Up, up interface are functioning.
Key commands to List Router Interface
Status: Lists a single line of output per
show ip interface brief
interface including the IP address and
interface status.
