Practice Free 300-410 Exam Online Questions
Refer to the exhibit.
An administrator is attempting to disable the automatic logout after a period of inactivity. After logging out the console stopped responding to all keyword inputs.
Remote access through SSH still work resolves the issue?
- A . Configure the exec command on line con 0.
- B . Configure the absolute-timeout command on line con 0.
- C . Configure the default exec-timeout command on line con 0.
- D . Configure the no exec-timeout command on line con 0.
Refer to the exhibit.
An engineer configures SW101 to send OSPFv3 interfaces state change messages to the server. However, only some OSPFv3 errors are being recorded.
Which organization resolves the ..?
- A . snmp-server enable traps ospfv3 state-change if-state-change
- B . snmp-server-enable traps ospfv3 state-change restart-status-change
- C . snmp-server-enable traps ospfv3 state-change neighbor-state-change.
- D . snmp-server-enable traps ospfv3 state-change if-state-change neighbor-state-change
Which two solutions are used to overcome a flapping link that causes a frequent label binding exchange between MPLS routers? (Choose two)
- A . Create link dampening on links to protect the session.
- B . Increase input queue on links to protect the session.
- C . Create targeted hellos to protect the session.
- D . Increase a hold-timer to protect the session.
- E . Increase a session delay to protect the session.
A, C
Explanation:
To avoid having to rebuild the LDP session altogether, you can protect it. When the LDP session between two directly connected LSRs is protected, a targeted LDP session is built between the two LSRs. When the directly connected link does go down between the two LSRs, the targeted LDP session is kept up as long as an alternative path exists between the two LSRs.
For the protection to work, you need to enable it on both the LSRs. If this is not possible, you can enable it on one LSR, and the other LSR can accept the targeted LDP Hellos by configuring the command mpls ldp discovery targeted-hello accept.
Reference: https://www.ccexpert.us/mpls-network/mpls-ldp-session-protection.html Or from the reference at https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/5eU6DfQV/TECMPL-3201.pdf
Troubleshooting LDP Issues
Problem:
I. When a link flaps (for a short time),
…
Solution:
+ When LDP session supported by link hello is setup, create a targeted hello to protect the session.
Which feature drops packets if the source address is not found in the snooping table?
- A . IPv6 Source Guard
- B . IPv6 Destination Guard
- C . IPv6 Prefix Guard
- D . Binding Table Recovery
A
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6_fhsec/configuration/xe-3s/ip6f-xe-3s-book/ip6-snooping.pdf
Refer to the exhibit.
The ACL is placed on the inbound Gigabit 0/1 interface of the router. Host 192.168.10.10cannot SSH to host 192.168.100.10 even though the flow is permitted.
Which action resolves the issue without opening full access to this router?
- A . Move the SSH entry to the beginning of the ACL
- B . Temporarily move the permit ip any any line to the beginning of the ACL to see if the flow works
- C . Temporarily remove the ACL from the interface to see if the flow works
- D . Run the show access-list FILTER command to view if the SSH entry has any hit statistic associated with it
Refer to Exhibit.
The network administrator configured the branch router for IPv6 on the E0/0 interface. The neighboring router is fully configured to meet requirements, but the neighbor relationship is not coming up.
Which action fixes the problem on the branch router to bring the IPv6 neighbors up?
- A . Enable the IPv4 address family under the router ospfv3 4 process by using the address-family ipv4 unicast command
- B . Disable IPv6 on the E0/0 interface using the no ipv6 enable command
- C . Enable the IPv4 address family under the E0/0 interface by using the address-family ipv4 unicast command
- D . Disable OSPF for IPv4 using the no ospfv3 4 area 0 ipv4 command under the E0/0 interface
A
Explanation:
Explanation
Once again, Cisco changed the IOS configuration commands required for OSPFv3 configuration. The new OSPFv3 configuration uses the “ospfv3” keyword instead of the earlier “ipv6 router ospf” routing process command and “ipv6 ospf” interface commands.
The Open Shortest Path First version 3 (OSPFv3) address families feature enables both IPv4 and IPv6 unicast traffic to be supported. With this feature, users may
have two processes per interface, but only one process per address family (AF).
Refer to Exhibit.
Traffic from the branch network should route through HQ R1 unless the path is unavailable. An engineer tests this functionality by shutting down interface on the BRANCH router toward HQ_R1 router but 192.168.20.0/24 is no longer reachable from the branch router.
Which set of configurations resolves the issue?
- A . HQ_R1(config)# ip sla responder
HQ_R1(config)# ip sla responder icmp-echo 172.16.35.2 - B . BRANCH(config)# ip sla 1
BRANCH(config-ip-sla)# icmp-echo 172.16.35.1 - C . HQ_R2(config)# ip sla responder
HQ_R2(config)# ip sla responder icmp-echo 172.16.35.5 - D . BRANCH(config)# ip sla 1
BRANCH(config-ip-sla)# icmp-echo 172.16.35.2
D
Explanation:
In the configuration above, the engineer has made a mistake as he was tracking 172.16.35.6 (the backup path) instead of tracking the main path (172.16.35.2). Therefore, when he shut down the main path, the track 1 was still up so traffic still went through the main path -> it failed.
To fix this issue, we just need to correct the tracking interface of the main path.
A CoPP policy is applied for receiving SSH traffic from the WAN interface on a Cisco ISR4321 router. However, the SSH response from the router is abnormal and stuck during the high link utilization. The problem is identified as SSH traffic does not match in the ACL.
Which action resolves the issue?
- A . Rate-limit SSH traffic to ensure dedicated bandwidth.
- B . Apply CoPP on the control plane interface.
- C . Increase the IP precedence value of SSH traffic to 6.
- D . Apply CoPP on the WAN interface inbound direction.
B
Explanation:
Explanation
The problem is “SSH traffic does not match in the ACL” and “CoPP policy is applied for receiving SSH traffic from the WAN interface” so we should apply CoPP on the control plane interface instead.
Which transport layer protocol is used to form LDP sessions?
- A . UDP
- B . SCTP
- C . TCP
- D . RDP
C
Explanation:
LDP multicasts hello messages to a well-known UDP port (646) in order to discover neighbors. Once the discovery is accomplished, a TCP connection (port 646) is established and the LDP session begins. LDP keepalives ensure the health of the session. Thanks to the LDP session, LDP messages create the label mappings required for a FEC. Withdraw messages are used when FECs need to be torn down.
Refer to the exhibit.
Although summarization is configured for R1 to receive 10.0.0.0/8. more specific routes are received by R1.
How should the 10.0.0.0/8 summary route be received from the neighbor, attached to R1 via Fast Ethernet0/0 interface?
- A . R1 should configure the ip summary-address eigrp <AS number> 10.0.0.0.255.0.0.0 command under the Fast Ethernet 0/0 interface.
- B . The summarization condition is not met Router 10 1 100.10 requires a route for 10 0.0.0/8 that points to null 0
- C . The summarization condition is not met. The network 10.1.100.0/24 should be changed to 172.16.0.0/24.
- D . R1 should configure the ip summary-address eigrp <AS number> 10.0.0.0 0.0.0.255 command under the Fast Ethernet 0/0 interface.