Refer to the exhibit. On the basis of the output, what two conclusions can be reached?
(Choose two.)

A.
The default administrative distance has been changed.

B.
IS-IS is not enabled.

C.
Three physical interfaces are taking part in integrated IS-IS.

D.
IS-IS is not redistributing any other routing protocols.

E.
There are two neighboring routers sending IS-IS routing information.

F.
Address summarization is configured.

Explanation:
Verifying IS-IS Configuration
To verify the IS-IS configuration and IP functionality of an Integrated IS-IS network, use the
following commands; these commands can also be useful for troubleshooting problems with
the IS- IS network:
• show ip protocols— Displays the active IP routing protocols, the interfaces on which
they are active, and the networks for which they are routing.
• show ip route [address [mask]] | [protocol [process-id]]— Displays the IP routing
table. You can specify the details for a particular route or a list of all routes in the routing
table from a particular routing protocol process.
Example 6-3 is sample output from the show ip protocols command that displays information
about IP routing being done by Integrated IS-IS. IS-IS is running, it is not redistributing any
other protocols, and address summarization has not been configured. Example 6-3 also
shows that interfaces FastEthernet 0/0, Loopback 0, and Serial 0/0/1 are taking part in
Integrated IS-IS, that there are two sources of routing information (the neighboring routers),
and that the administrative distance of Integrated IS-IS is 115.
Example 6-3, “show ip protocols” Command to Examine IS-IS:
R2#show ip protocols

Routing Protocol is “isis”
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: isis
Address Summarization:
None
Maximum path: 4
Routing for Networks:
FastEthernet0/0
Loopback0
Serial0/0/1
Routing Information Sources:
Gateway Distance Last Update
10.10.10.10 115 00:00:02
10.30.30.30 115 00:00:03
Distance: (default is 115)
R2#
Authorized Self-Study Guide Building Scalable Cisco Internetworks (BSCI), Third
Edition
http://safari.ibmpressbooks.com/1587052237/ch06lev1sec4