what two conclusions can be reached?

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