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2021 Nov JN0-691 sample question
Q1. Click the Exhibit button. -- Exhibit --user@R1> show pfe statistics traffic Packet Forwarding Engine traffic statistics: Input packets: 47593914461368 2 pps Output packets: 28805646 3 pps Packet Forwarding Engine local traffic statistics: Local packets input : 36278104324 Local packets output : 2 Software input control plane drops : 0 Software input high drops : 0 Software input medium drops : 0 Software input low drops : 0 Software output drops : 0 Hardware input drops : 191367536738 Packet Forwarding Engine local protocol statistics: HDLC keepalives : 0 ATM OAM : 0 Frame Relay LMI : 0 PPP LCP/NCP : 0 OSPF hello : 3883169 OSPF3 hello : 0 RSVP hello : 1440704 LDP hello : 4782297 BFD : 0 IS-IS IIH : 0 LACP : 0 ARP : 765512 ETHER OAM : 0 Unknown : 1897610 Packet Forwarding Engine hardware discard statistics: Timeout : 0 Truncated key : 0 Bits to test : 0 Data error : 0 Stack underflow : 0 Stack overflow : 0 Normal discard : 191367536738 Extended discard : 0 Invalid interface : 0 Info cell drops : 191367536738 Fabric drops : 191367536738 Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics: Input Checksum : 0 Output MTU : 0 -- Exhibit --Referring to the exhibit, which counter indicates a possible denial of service attack?
A. hardware input drops
B. normal discard
C. info cell drops
D. fabric drops
Answer: A
Q2. Click the Exhibit button. -- Exhibit -- [edit] user@router# show interfaces ge-1/1/2 { vlan-tagging; unit 100 { vlan-id 100; family inet { address 192.168.0.1/30; } } } lo0 { unit 0 { family inet { address 10.10.10.1/32; } } } [edit] user@router# show protocols ospf area 0.0.0.0 { interface ge-1/1/2.0 { interface-type p2p; metric 250; } interface lo0.0; } [edit] user@router# run show ospf interface Interface State Area DR ID BDR ID Nbrs lo0.0 DR
0.0.0.0 10.10.10.1 0.0.0.0 0 [edit] user@router# -- Exhibit --Referring to the exhibit, why does only the loopback interface appear in the show ospf interface output?
A. The interface-type is not configured properly on the ge-1/1/2 interface.
B. The incorrect logical unit for the ge-1/1/2 interface is configured under the OSPF hierarchy.
C. The ge-1/1/2 interface is configured under the wrong OSPF area.
D. The metric configured on ge-1/1/2 is not valid.
Answer: B
Q3. Which command is used to determine a serial number of a previously installed FRU?
A. show log kmd
B. show log inventory
C. show log chassisd
D. show log dcd
Answer: B
Q4. What are three physical interface properties? (Choose three.)
A. clocking
B. protocol family
C. maximum transmission unit
D. frame check sequence
E. virtual circuit identifier
Answer: A, C, D
Q5. Which three statements are correct about ARP related troubleshooting? (Choose three.)
A. Most devices that run the Junos OS allow you to specify a manual ARP entry.
B. The monitor traffic interface <interface-name> command can be used to watch ARP packets.
C. There are no default ARP policers on any devices running the Junos OS.
D. An individual ARP entry can be cleared using the clear arp hostname command.
E. The clear arp command also clears the IPv6 neighbor cache.
Answer: A, B, D
Rebirth JN0-691 simulations:
Q6. Which CLI command would be used to verify the routing protocol daemon memory usage?
A. show route summary
B. show route detail
C. show system processes extensive
D. show chassis routing-engine
Answer: C
Q7. A customer operates a multi-vendor production network. They report that LSAs are aging out on Junos devices. Which OSPF parameter must be tuned to prevent this behavior?
A. LSA refresh interval
B. hello interval
C. dead interval
D. LSA retransmission interval
Answer: A
Q8. -- Exhibit –
[edit] user@R1# run show interfaces ge-1/1/2 terse Interface Admin Link Proto Local Remote ge-1/1/2 up up ge-1/1/2.0 up up aenet --> ae0.0 [edit] user@R1# run show interfaces ge-1/1/3 terse Interface Admin Link Proto Local Remote ge-1/1/3 up up ge-1/1/3.0 up up aenet --> ae0.0 [edit] user@R1# run show interfaces ae0 terse Interface Admin Link Proto Local Remote ae0 up down ae0.0 up down bridge [edit] user@R1# show interfaces ae0 aggregated-ether-options { lacp { periodic slow; system-priority 200; } } unit 0 { family bridge { interface-mode trunk; vlan-id-list 100; } } *************************************************************************
*
[edit] user@R2# run show interfaces ge-1/1/2 terse Interface Admin Link Proto Local Remote ge-1/1/2 up up ge-1/1/2.0 up up aenet --> ae0.0 [edit] user@R2# run show interfaces ge-1/1/3 terse Interface Admin Link Proto Local Remote ge-1/1/3 up up ge-1/1/3.0 up up aenet --> ae0.0 [edit] user@R2# run show interfaces ae0 terse Interface Admin Link Proto Local Remote ae0 up down ae0.0 up down bridge [edit] user@R2# show interfaces ae0 aggregated-ether-options { lacp { periodic fast; system-priority 100; } } unit 0 { family bridge { interface-mode trunk; vlan-id-list 100; } } -- Exhibit --You have configured a LAG and are now enabling LACP on the ae0 interface. You have configured and committed the configuration as shown in the exhibit. However, the exhibit also shows that the ae0 interface is now in the up/down state. What must you do to resolve this problem?
A. Configure both routers' ae0 LACP configuration to periodic fast.
B. Change the LACP system-priority of R1 to 300.
C. Configure R1's LACP configuration as active.
D. Configure R2's LACP configuration as passive.
Answer: C
Q9. Your router is not advertising all known BGP routes to its EBGP neighbor. Which statement is correct in this scenario?
A. You should create and apply an import policy to match all BGP routes with theacceptaction.
B. You should create and apply an export policy to match all BGP routes with theacceptaction.
C. You should configureadvertise-externalfor this EBGP neighbor.
D. You should configureadvertise-inactivefor this EBGP neighbor.
Answer: B
Q10. Click the Exhibit button. -- Exhibit --user@r2# run show route 100.1.1.0/24 detail inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden) 100.1.1.0/24 (1 entry, 1 announced) *Static PreferencE.5 Next hop typE.Reject Address: 0x8f7b5a4 Next-hop reference count: 2 StatE. Local AS: 65001 AgE.59 Task: RT Announcement bits (1): 2-KRT AS path: 65005 I user@r2# show protocols bgp group ibgp { type external; export to-bgp; neighbor 10.1.2.1 { local-address 10.1.2.2; family inet { unicast; } family inet6 { unicast; } peer-as 65005; } } user@r2# run show bgp summary Groups: 1 Peers: 1 Down peers: 0 Table Tot Paths Act Paths Suppressed History Damp State Pending inet6.0 0 0 0 0 0 0 inet.0 0 0 0 0 0 0 Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
10.1.2.1 65005 31 31 0 0 12:08 Establ
inet6.0: 0/0/0/0 inet.0: 0/0/0/
user@r2# show policy-options policy-statement to-bgp {
from protocol static; then accept;
}
user@r2# run show route advertising-protocol bgp 10.1.2.1 [edit]
user@r2#
-- Exhibit --Referring to the exhibit, router r2 does not advertise the static route to peer 10.1.2.1. What
is the problem?
A. The export policy is incorrect.
B. The static route has Next hop typE.Reject.
C. The export policy should be applied under the [edit protocols bgp group ibgp neighbor
10.1.2.1] hierarchy.
D. An AS path loop is detected.
Answer: D