Juniper JN0-692 問題集

質問 1：


You have created a new IS-IS adjacency between identical routers over two STM-4 circuits. After enabling no-keepalives on the interfaces, they come up and you are able to ping between the routers. However, the IS-IS adjacency still will not establish.
Which step will determine the cause of the problem?
A. Disable no-keepalives from the interfaces and issue a show interfaces extensive command for each of the SONET interfaces.
B. Enable family iso on all the SONET interfaces, commit, and test the circuits.
C. Disable cisco-hdlc encapsulation, enable ppp encapsulation, commit, and test the circuits.
D. Disable no-keepalives from the interfaces and issue a show isis adjacency command.
正解：A

質問 2：
You notice that an EBGP peering session has terminated and no NOTIFICATION message appears in the traceoptions output.
What has happened?
A. The peer update message was missing essential BGP attributes.
B. The peer router has crashed.
C. The peer state was reset to Idle.
D. The peer has restarted the hold timer.
正解：B

質問 3：
Click the Exhibit button.
-- Exhibit -
pim { spt-threshold { infinity mcast; } rp { static { address ; } } interface ge-0/0/0.0 { disable; } interface ge-0/0/3.0; interface ge-0/0/4.0;
}
policy-statement mcast { term 1 { from { route-filter 224.0.0.0/4 orlonger; } then accept; }
}
-- Exhibit -
Referring to the last-hop router's information shown in the exhibit, multicast flows are using a suboptimal path. What is the reason?
A. The SPT policy is using the wrong subnet mask for the multicast range.
B. All flows are switching over to SPT too fast.
C. RPF is failing for the entire multicast range.
D. All flows are traversing the rendezvous point because of the configuration.
正解：D

質問 4：
Click the Exhibit button.
-- Exhibit -
user@P1# show policy-options policy-statement imp-bgp1 term 1 {
from {
protocol bgp;
route-filter 0.0.0.0/0 orlonger;
}
then {
preference 245;
}
}
user@P1# show protocols bgp group IBGP
local-address 172.24.255.1;
family inet {
unicast; } family inet-vpn {
unicast; } cluster 172.24.255.1; peer-as 50; neighbor 172.24.255.3; neighbor 172.24.255.2 {
local-preference 200;
import imp-bgp1; } neighbor 172.24.255.4; -- Exhibit -
The operator of the network shown in the exhibit wants to make 172.24.255.2 the preferred path for routes. However, the router still prefers a different peer.
What is the problem?
A. The default protocol preference is more preferred than the preference set in the policy.
B. The local preference setting is below the default.
C. The import policy is setting the protocol preference less preferred than the default.
D. The default protocol preference is less preferred than the preference set in the policy.
正解：A

質問 5：
What is the primary mechanism that prevents BGP routing loops?
A. the underlying IGP's loop prevention mechanism
B. SPF tree
C. AS path
D. routing policy
正解：C