Information Technology Reference
In-Depth Information
Answer: The value 90 should be circled for the 192.168.1.0/24 and 192.168.6.0/24 networks. The
value 120 should be circled for the 192.168.5.0/24, 192.168.7.0/24, and 192.168.8.0/24 networks.
What other command can be used to verify the administrative distance used by a routing protocol?
show ip protocols
Notice that the directly connected networks in Example 3-1 do not show an administrative distance.
What command would show the administrative distance (list as simply “distance”) for the 192.168.2.0
route in R2's routing table?
show ip route 192.168.2.0
R2 might have knowledge of more networks than is shown in the routing table. What command will
display all the RIP routes learned by R2, whether or not the RIP route is installed in the routing table?
show ip rip database
Routing Sources and Administrative Distance Exercise
Table 3-2 shows an incomplete chart of the different administrative distance values for various routing
protocols. Fill in the missing information.
Table 3-2
Default Administrative Distances
Route Source
AD
Connected
0
Static
1
EIGRP summary route
5
External BGP
20
Internal EIGRP
90
IGRP
100
OSPF
110
IS-IS
115
RIP
120
External EIGRP
170
Internal BGP
200
Unknown
255
Identifying Elements of the Routing Table Exercise
The purpose of this exercise is to practice how to correctly identify the route source, administrative
distance, and metric for a given route based on output from the
show ip route
command.
The output is not common for most routing tables. Running more than one routing protocol on the
same router is rare. Running three, as shown here, is more of an academic exercise and has value in
that it will help you learn to interpret the routing table output.
