Refer to the exhibit.
Routers R1 and R2 are running EIGRP and have converged. On the basis of the information that
is presented, which statement is true?
A.
All outgoing routing updates from router R1 to router R2 will be suppressed, but the inbound
updates will continue to be received.
B.
All incoming routing updates from R2 will be suppressed, but the outgoing updates will continue
to be sent.
C.
Both outgoing and incoming routing updates on R1 will be stopped because of the passiveinterface Serial0/0 configuration statement.
D.
Both outgoing and incoming routing updates on R1 will be permitted because the distribute-list
20 out Serial0/0 command cannot be used with association with the outgoing interface.
Explanation:
You can use the passive-interface command to control the advertisement of routing information.
The command enables the suppression of routing updates over some interfaces while it allows
updates to be exchanged normally over other interfaces.
With most routing protocols, the passive-interface command restricts outgoing advertisements
only. However, when used with Enhanced Interior Gateway Routing Protocol (EIGRP), the effect is
slightly different. With EIGRP running on a network, the passive-interface command stops both
outgoing and incoming routing updates, since the effect of the command causes the router to stop
sending and receiving hello packets over an interface.
Reference:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0a.shtml