Cisco 642-883 Exam Questions And Information – (Jan-2018 Dumps)

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

Question: 21

When configuring Cisco IOS route maps, which command allows the route map processing to jump to another statement instead of exiting?

A. jump
B. next
C. set
D. continue
E. goto

Answer: D

Explanation:
Match Operations With Continue Clauses
If a match clause does not exist in the route-map entry but a continue clause does, the continue clause will be automatically executed and go to the specified route-map entry. If a match clause exists in a route-map entry, the continue clause is executed only when a successful match occurs. When a successful match occurs and a continue clause exists, the route map executes the set clauses and then goes to the specified route-map entry. If the next route map contains a continue clause, the route map will execute the continue clause if a successful match occurs. If a continue clause does not exist in the next route map, the route map will be evaluated normally. If a continue clause exists in the next route map but a match does not occur, the route map will not continue and will “fall through” to the next sequence number if one exists.
Set Operations With Continue Clauses
Set clauses are saved during the match clause evaluation process and executed after the route-map evaluation is completed. The set clauses are evaluated and executed in the order in which they were configured. Set clauses are only executed after a successful match occurs, unless the route map does not contain a match clause. The continue statement proceeds to the specified route-map entry only after configured set actions are performed. If a set action occurs in the first route map and then the same set action occurs again, with a different value, in a subsequent route map entry, the last set action may override any previous set actions that were configured with the same set command unless the set command permits more than one value. For example, the set as-path pretend command permits more than one autonomous system number to be configured.

Question: 22

Refer to the Cisco IOS route map configuration exhibit.

Which two statements are correct? (Choose two.)

A. The match prefix-list condition is a logical OR: match prefix list PL1 OR PL2.
B. All match conditions are logical OR: match prefix list PL1 OR PL2 OR match the APACL1 AS path access list.
C. The three match conditions are logical AND. match prefix list PL1 AND PL2 AND match the APACL1 AS path access list.
D. The local preference AND the metric will be set to 100 IF the route matches the PL1 OR PL2 prefix list AND the route must also match the APACL1 AS path access list.
E. All routes that are not matched by the sequence 10 route map statement will be dropped.

Answer: A, D

Explanation:
http://www.routeralley.com/ra/docs/route_maps.pdf
When match criteria is contained within a single line, a logical OR is applied.

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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