Question 61
Selectable Answer
Which two protocols work in the control plane of P routers across the MPLS cloud? (choose two)
Answer:
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Question 62
Selectable Answer
An engineer configured the wrong default gateway for the Cisco DNA Center enterprise interface during the install.
Which command must the engineer run to correct the configuration?
Which command must the engineer run to correct the configuration?
Answer:
Question 63
Selectable Answer
Refer to the exhibit.
Reachability between servers in a network deployed with DHCPv6 is unstable.
Which command must be removed from the configuration to make DHCPv6 function?
Reachability between servers in a network deployed with DHCPv6 is unstable.
Which command must be removed from the configuration to make DHCPv6 function?
Answer:
Question 64
Selectable Answer
Refer to the exhibit.
A network administrator configured an IPv6 access list to allow TCP return frame only, but it is not working as expected.
Which changes resolve this issue?
A)
B)
C)
D)
A network administrator configured an IPv6 access list to allow TCP return frame only, but it is not working as expected.
Which changes resolve this issue?
A)
B)
C)
D)
Answer:
Explanation:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/122_55_se/configuration/guide/scg3750/swv6acl.html
Explanation:
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/122_55_se/configuration/guide/scg3750/swv6acl.html
Question 65
Selectable Answer
Which control plane process allows the MPLS forwarding state to recover when a secondary RP takes over from a failed primary RP?
Answer:
Question 66
Written Answer
DRAG DROP
Drag and drop the packet types from the left onto the correct descriptions on the right.
Drag and drop the packet types from the left onto the correct descriptions on the right.
Answer:
Explanation:
Unlike legacy network technologies such as ISDN, Frame Relay, and ATM that defined separate data and control channels, IP carries all packets within a single pipe. Thus, IP network devices such as routers and switches must be able to distinguish between data plane, control plane, and management plane packets to treat each packet appropriately.
From an IP traffic plane perspective, packets may be divided into four distinct, logical groups:
Explanation:
Unlike legacy network technologies such as ISDN, Frame Relay, and ATM that defined separate data and control channels, IP carries all packets within a single pipe. Thus, IP network devices such as routers and switches must be able to distinguish between data plane, control plane, and management plane packets to treat each packet appropriately.
From an IP traffic plane perspective, packets may be divided into four distinct, logical groups:
Question 67
Selectable Answer
Which routing protocol is used by the PE router to advertise routes to a CE router without redistribution or static after removing the RD tag from the P router?
Answer:
Question 68
Selectable Answer
Refer to the exhibit.
Users report that IP addresses cannot be acquired from the DHCP server. The DHCP server is configured as shown. About 300 total nonconcurrent users are using this DHCP server, but none of them are active for more than two hours per day.
Which action fixes the issue within the current resources?
Users report that IP addresses cannot be acquired from the DHCP server. The DHCP server is configured as shown. About 300 total nonconcurrent users are using this DHCP server, but none of them are active for more than two hours per day.
Which action fixes the issue within the current resources?
Answer:
Question 69
Selectable Answer
What is an advantage of implementing BFD?
Answer:
Question 70
Selectable Answer
Refer to the exhibit.
An OSPF neighbor relationship between R2 and R3 is showing stuck in EXCHANGE/EXSTART state. The neighbor is established between R1 and R2. The network engineer can ping from R2 to R3 and vice versa, but the neighbor is still down.
Which action resolves the issue?
An OSPF neighbor relationship between R2 and R3 is showing stuck in EXCHANGE/EXSTART state. The neighbor is established between R1 and R2. The network engineer can ping from R2 to R3 and vice versa, but the neighbor is still down.
Which action resolves the issue?
Answer:
Explanation:
After two OSPF neighboring routers establish bi-directional communication and complete DR/BDR election (on multi-access networks), the routers transition to the exstart state. In this state, the neighboring routers establish a master/slave relationship and determine the initial database descriptor (DBD) sequence number to use while exchanging DBD packets.
Neighbors Stuck in Exstart/Exchange State
The problem occurs most frequently when attempting to run OSPF between a Cisco router and another vendor’s router. The problem occurs when the maximum transmission unit (MTU) settings for neighboring router interfaces don’t match. If the router with the higher MTU sends a packet larger that the MTU set on the neighboring router, the neighboring router ignores the packet.
Explanation:
After two OSPF neighboring routers establish bi-directional communication and complete DR/BDR election (on multi-access networks), the routers transition to the exstart state. In this state, the neighboring routers establish a master/slave relationship and determine the initial database descriptor (DBD) sequence number to use while exchanging DBD packets.
Neighbors Stuck in Exstart/Exchange State
The problem occurs most frequently when attempting to run OSPF between a Cisco router and another vendor’s router. The problem occurs when the maximum transmission unit (MTU) settings for neighboring router interfaces don’t match. If the router with the higher MTU sends a packet larger that the MTU set on the neighboring router, the neighboring router ignores the packet.
Question 71
Selectable Answer
Refer to the exhibit.
A shoe retail company implemented the uRPF solution for an antispoofing attack. A network engineer received the call that the branch A server is under an IP spoofing attack.
Which configuration must be implemented to resolve the attack?
A)
B)
C)
D)
A shoe retail company implemented the uRPF solution for an antispoofing attack. A network engineer received the call that the branch A server is under an IP spoofing attack.
Which configuration must be implemented to resolve the attack?
A)
B)
C)
D)
Answer:
Question 72
Selectable Answer
Refer to the exhibit.
The OSPF routing protocol is redistributed into the BGP routing protocol, but not all the OSPF routes are distributed into BGP.
Which action resolves the issue?
The OSPF routing protocol is redistributed into the BGP routing protocol, but not all the OSPF routes are distributed into BGP.
Which action resolves the issue?
Answer:
Explanation:
If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default. You can use the internal keyword along with the redistribute command under router bgp to redistribute OSPF intra- and inter-area routes.
Use the external keyword along with the redistribute command under router bgp to redistribute OSPF external routes into BGP.
-> In order to redistribute all OSPF routes into BGP, we must use both internal and external keywords. The full command would be (suppose we are using OSPF 1): redistribute ospf 1 match internal external
Note: The configuration shows match internal external 1 external 2. This is normal because OSPF automatically appends “external 1 external 2” in the configuration. In other words, keyword external = external 1 external 2. External 1 = O E1 and External 2 = O E2.
Reference: https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5242-bgp-ospf-redis.html
Explanation:
If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default. You can use the internal keyword along with the redistribute command under router bgp to redistribute OSPF intra- and inter-area routes.
Use the external keyword along with the redistribute command under router bgp to redistribute OSPF external routes into BGP.
-> In order to redistribute all OSPF routes into BGP, we must use both internal and external keywords. The full command would be (suppose we are using OSPF 1): redistribute ospf 1 match internal external
Note: The configuration shows match internal external 1 external 2. This is normal because OSPF automatically appends “external 1 external 2” in the configuration. In other words, keyword external = external 1 external 2. External 1 = O E1 and External 2 = O E2.
Reference: https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5242-bgp-ospf-redis.html
Question 73
Selectable Answer
Refer to the exhibit.
A junior engineer updated a branch router configuration. Immediately after the change, the engineer receives calls from the help desk that branch personnel cannot reach any network destinations.
Which configuration restores service and continues to block 10.1.1.100/32?
A junior engineer updated a branch router configuration. Immediately after the change, the engineer receives calls from the help desk that branch personnel cannot reach any network destinations.
Which configuration restores service and continues to block 10.1.1.100/32?
Answer:
Explanation:
By using “deny” keyword in a route-map, we can filter out the prefix specified in the prefix-list.
But there is an implicit “deny all” statement in the prefix-list so we must permit other prefixes with “permit” keyword in the route-map.
Explanation:
By using “deny” keyword in a route-map, we can filter out the prefix specified in the prefix-list.
But there is an implicit “deny all” statement in the prefix-list so we must permit other prefixes with “permit” keyword in the route-map.
Question 74
Selectable Answer
Refer the exhibit.
Which action resolves intermittent connectivity observed with the SNMP trap packets?
Which action resolves intermittent connectivity observed with the SNMP trap packets?
Answer:
Question 75
Selectable Answer
Refer to the exhibit.
The connected routers do not show up as OSPF neighbors.
Which action resolves the issue?
The connected routers do not show up as OSPF neighbors.
Which action resolves the issue?
Answer:
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