New Cisco 642-883 Exam With Updated Exam Questions – [Jan-2018 Dumps]

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642-883 exam questions, 642-883 PDF dumps; 642-883 exam dumps:: https://www.dumpsschool.com/642-883-exam-dumps.html (130 Q&A) (New Questions Are 100% Available! Also Free Practice Test Software!)

Latest and Most Accurate Cisco 642-883 Dumps Exam Questions and Answers:

Question: 21

Which configuration implements the most secured OSPF authentication mode on Cisco IOS XE?

A. interface Gi0/0/0/0
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 cisco
B. router ospf 1
area 1
authentication message-digest
interface GigabitEthernet0/0/0/0
message-digest-key 1 md5 cisco
C. router ospf 1
area 1
interface GigabitEthernet0/0/0/0
authentication message-digest
message-digest-key 1 md5 cisco
D. router ospf 1
area 1 authentication
interface GigabitEthernet0/0/0/0
ip ospf authentication-key cisco
E: interface Gi0/0/0/0
ip ospf authentication
ip ospf authentication-key cisco

Answer: A

Question: 22

Which three potential issues can cause an OSPF adjacency to not come up? (Choose three.)

A. wrong area configured on OSPF peers
B. wrong authentication key configured on OSPF peers
C. different OSPF instance numbers configured on OSPF peers
D. different OSPF instances and VRFs configured with the command: router ospf vrf
E. having the no passive-interface statement configured for the interfaces on which OSPF adjacencies are expected to form
F. Layer 2 connectivity problems on the shared medium of the participating OSPF-enabled routers

Answer: A, B, F

Question: 23

On Cisco IOS XR Software, which set of commands is used to enable the gi0/0/0/1 interface for OSPF in area 0?

A. interface gi0/0/0/0
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
network 10.1.1.1 0.0.0.0 area 0
B. interface gi0/0/0/0
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
network 10.1.1.1 255.255.255.255 area 0
C. router ospf 1
area 0
interface GigabitEthernet0/0/0/1
D. interface gi0/0/0/0
ip address 10.1.1.1 255.255.255.0
ip ospf 1 area 0
E. router ospf 1
address-family ipv4 unicast
interface GigabitEthernet0/0/0/1 area 0
F. router ospf 1
address-family ipv4 unicast
interface GigabitEthernet0/0/0/1
area 0

Answer: C

Question: 24

Which three statements are true regarding the OSPF router ID? (Choose three.)

A. The OSPF routing process chooses a router ID for itself when it starts up.
B. The router-id command is the preferred procedure to set the router ID.
C. If a loopback interface is configured, its address will always be preferred as the router ID over any other methods.
D. After the router ID is set, it does not change, even if the interface that the router is using for the router ID goes down. The router ID changes only if the router reloads or if the OSPF routing process restarts.
E. In OSPF version 3, the OSPF router ID uses a 128-bit number.

Answer: A, B, D

Question: 25

Which two OSPF network scenarios require OSPF virtual link configuration? (Choose two.)

A. to connect an OSPF non-backbone area to area 0 through another non-backbone area
B. to connect an NSSA area to an external routing domain
C. to connect two parts of a partitioned backbone area through a non-backbone area
D. to enable route leaking from Level 2 into Level 1
E. to enable route leaking from Level 1 into Level 2
F. to enable OSPF traffic engineering

Answer: A, C

Question: 26

What is function of the RP/0/RSP0/CPU0:PE1(config-ospf)#distance Cisco IOS-XR command?

A. To modify the administrative distance of the OSPF routes
B. To modify the default seed metric of the OSPF external routes
C. To modify the OSPF default reference bandwidth
D. To modify the OSPF cost

Answer: A

Explanation:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.8/routing/command/reference/rr38ospf.pdf

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