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2021 Nov 642-883 answers
Q31. When using the Cisco IOS XR route policy language to define a logical if-then-else condition, which logical operator has the highest precedence?
A. AND
B. OR
C. NOT
D. IS
E. IN
Answer: C
Explanation:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.0/routing/configuration/guide/rc3rpl.ht ml
C:Documents and Settingsuser-nwzDesktop1.JPG
Q32. Refer to the Cisco IOS show command output shown in the exhibit.
Which of the following statements is correct?
A. The best path to 10.2.10.1/32 was chosen because of the AS path.
B. The best path to 10.2.10.1/32 was chosen because of the weight.
C. The best path to 10.2.10.1/32 was chosen because of the local preference.
D. The best path to 10.2.10.1/32 was chosen because of the MED.
E. The best path to 10.2.10.1/32 was chosen because of the route origin.
Answer: B
Q33. RAG DROP
Answer:
Q34. A network engineer cannot connect different routers by eBGP using peer groups. Which two actions establish an adjacency between both routers? (Choose two.)
A. Ensure that the peer group statements match across all routers.
B. Ensure that ebgp-multihop is configured.
C. Ensure that the remote-as statement is configured with the correct peer AS.
D. Configure a weight value that is lower than the default value of 32768.
E. Specify the weight attribute first.
Answer: B,C
Q35. Referring to the partial Cisco IOS-XR BGP configuration exhibit, when trying to commit this configuration, the following error is displayed:
% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue 'show configuration failed' from this session to view the errors.
What is wrong with the configuration?
A. IPv6 unicast routing has not been enabled globally using the ipv6 unicast-routing command
B. The configuration is missing the required network command
C. The update-source loopback 0 commands must be configured under the respective neighbor address-family
D. The configuration is missing the address-family ipv4 unicast and address-family ipv6 unicast commands under router bgp 65111
Answer: D
Up to the minute 642-883 exam answers:
Q36. RAG DROP
Answer:
Q37. In an AS with 10 routers running IBGP, how many IBGP sessions will be required to establish fully meshed IBGP peerings?
A. 10
B. 20
C. 45
D. 50
E. 99
F. 100
Answer: C
Q38. Refer to the route policies exhibit.
Which five route policies will cause the routes to be dropped or passed? (Choose five)
A. route-policy one will cause the routes to be dropped.
B. route-policy two will cause the routes to be dropped.
C. route-policy three will cause the routes to be dropped.
D. route-policy four will cause the routes to be dropped.
E. route-policy five will cause the routes to be dropped.
F. route-policy one will cause the routes to be passed.
G. route-policy two will cause the routes to be passed.
H. route-policy three will cause the routes to be passed.
I. route-policy four will cause the routes to be passed.
J. route-policy five will cause the routes to be passed.
Answer: A,C,E,G,I
Q39. An engineer is working for a service provider who is strategically important to the Internet data traffic. The CTO is promoting a core infrastructure upgrade to connect via optical links network service providers. Which three concerns must be addressed while planning the new BGP features and functionalities? (Choose three.)
A. BGP suboptimal routing
B. IPv4 exhaustion
C. routers and switches hardware capabilities
D. route dampening of current customers
E. multihoming policies of new customers
F. IGP reconvergence time on the inter-AS links
G. BGP blackholing when acting as transit autonomous system
Answer: A,C,G
Q40. Which option describes how.an engineer must configure route summarization on a Cisco IOS XE OSPF-enabled network of routers?
A. area range command under the router OSPF process of the ABR
B. area range command under the router OSPF process of the router wanting to originate the summary route from
C. summary-address command under the OSPF process of the ABR
D. summary-address command under the OSPF process of the router wanting to originate the summary route from
E. network statement for the aggregate address under the router OSPF process on the ABR
F. network statement for the aggregate address under the router OSPF process of the router wanting to originate the summary route from
Answer: A