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Cisco 300-510リアル試験問題保証付き 更新された問題集
質問 52
A network consultant is troubleshooting IS-IS instances to identify why a routing domains is having communication problems between the two instances. Which description of the possible cause of issues in the routing domain is true?
- A. The interface mode ip router is-is command was not included in the script
- B. The same interface cannot be advertised in two different IS-IS instances
- C. The configured IS-IS NSEL value is not allowing the routing systems to establish a neighborship
- D. The IS-IS "ISP" and "ISP2" instances are unrelated and unable to intercommunicate
正解: B
解説:
Reference:
irs-instance-vrf.html
質問 53 
Refer to the exhibit. Router 1 is a core ABR in a Cisco Unified MPLS environment. All of the router 1 BGP peers are established, but traffic between customers is failing. Which BGP configuration must be added to the configuration?
- A. It must be configured with a route reflector
- B. It must be configured with send labels
- C. It must be configured for graceful restart
- D. It must be configured with PIC edge
正解: B
質問 54
Which command is used to enable BIDIR-PIM under global configuration mode for Cisco IOS XE Software?
- A. ipv4 pim bidir-enable
- B. multicast-routing
- C. Ip pim bidlr-enable
- D. ip pim bidir ip
正解: C
質問 55
After changing the IP address on an IOS XR router, an engineer cannot ping the new address Which step did the engineer forget to complete?
- A. roll back the configuration
- B. save the running configuration
- C. commit the configuration
- D. merge the configuration
正解: C
質問 56
What are three requirements for a static IPv6-in-IPv4 tunnel? (Choose three.)
- A. Cisco Express Forwarding must be enabled.
- B. A dynamic IPv6 address must be configured.
- C. Each tunnel endpoint must support IPv4 and IPv6.
- D. A static IPv4 address must be configured.
- E. A dynamic IPv4 address must be configured.
- F. A static IPv6 address must be configured.
正解: C,D,F
質問 57
What is the purpose of a BGP confederation?
- A. It limits the number of routes a device receives from its peers, which reduces CPU load.
- B. It redirects traffic away from route reflectors, which reduces their operating load.
- C. It reduces the number of iBGP peers and increases stability.
- D. It improves service by increasing the number of simultaneous iBGP peering sessions.
正解: C
質問 58
Refer to the exhibit.
Which task must you perform on interface g1/0/0 to complete the SSM implementation?
- A. disable IGMP
- B. configure OSPFv3
- C. enable CDP
- D. configure IGMPv3
正解: D
解説:
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-ssm.html
質問 59
Which two statements about mapping multicast IP addresses to MAC addresses are true? (Choose two.)
- A. The mapping process may generate overlapping addresses, which can cause receivers to receive unwanted packets
- B. All destination MAC addresses begin with an octet of binary 1s
- C. All multicast MAC addresses end with 0x0100.5E
- D. All mapped multicast MAC addresses begin with 0x0100.5E
- E. The router performs the mapping before it hands the packet off to a switch
正解: A,D
質問 60
Refer to the exhibit.
The green policy is designed with low delay, and the pink policy is designed with low cost. What is the next hop for node A on its way to node D, with the objective of achieving a low delay?
- A. 192.168.3.2
- B. 192. 168.1.2
- C. 192.168.1.6
- D. 192.168.3.6
正解: B
質問 61
Refer to the exhibit.
After troubleshooting BGP traffic steering issue, which action did the network operator take to achieve the correct effect of this configuration?
- A. Routes that have originated through AS 65517 have the local preference set to 150.
- B. Routes that have passed through AS 65517 have the local preference set to 150.
- C. Routes directly attached to AS 65517 have the local preference set to 150.
- D. Routes that have passed through AS 65517 have the local preference set to 150 and the traffic is denied.
正解: B
質問 62
Refer to the exhibit. Which LSA type is indicated by this router output?
- A. type 1 LSA
- B. type 3 LSA
- C. type 4 LSA
- D. type 2 LSA
正解: A
質問 63
What are two differences between OSPF and IS-IS? (Choose two.)
- A. OSPF elects a DR and a BDR, and IS-IS elects a DIS.
- B. OSPF is a link-state routing protocol, and IS-IS is a distance-vector routing protocol.
- C. OSPF uses a router ID to identify a router, and IS-IS uses a system ID.
- D. Unlike IS-IS routers, an OSPF router belongs to only one area in addition to the backbone area.
- E. Unlike OSPF. IS-IS supports virtual links.
正解: A,C
質問 64 
Refer to the exhibit. Which effect of this configuration is true?
- A. It sets the keepalive timer to 30 milliseconds and the hold timer to 240 milliseconds
- B. It sets the hold timer to 30 milliseconds and the keepalive timer to 240 milliseconds
- C. It sets the keepalive timer to 30 seconds and the hold timer to 240 seconds.
- D. It sets the hold timer to 30 seconds and the keepalive timer to 240 seconds
正解: C
解説:
Explanation
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/command/irg-cr-book/bgp-s1.html#wp1552800140
質問 65
A network engineer is troubleshooting OSPF multiarea. Which Cisco IOS XR feature should the engineer use in order to streamline OSPF issue?
- A. DR support for topology management
- B. hierarchical CLI
- C. show lp ospf topology command
- D. routing process enabled by default on all interfaces
正解: C
質問 66
Refer to the exhibit.
An engineer is troubleshooting an OSPF issue. Router 1 has a neighbor relationship with router 2. Only router 1 classful EIGRP routes can be seen on router 2. In order for all EIGRP routes to be redistributed correctly, which action should be taken?
- A. Router 1 must have the keyword subnets included in the redistribution command for all EIGRP routes to be redistributed.
- B. Router 1 must have the keyword metric-type 1 included in the redistribution command for all EIGRP routes to be redistributed.
- C. Router 1 must remove the AS number 1 from the redistribution command for all EIGRP routes to be redistributed.
- D. Router 1 must have the keyword ospf-metric included in the redistribution command for all EIGRP routes to be redistributed.
正解: A
質問 67
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