Regenerate 642-883 Testing Bible 2021

NEW QUESTION 1
Which configuration is used when matching a prefix-list <name> in a route map?

• A. match ip address prefix-list mylist
• B. match ip address mylist
• C. match ip next-hop mylist
• D. ip local-policy route-map mylist
• E. ip-policy route-map mylist

Answer: A

NEW QUESTION 2
A Cisco IOS XR router is a member in OSPF 1 and EIGRP 100 domains, and needs to redistribute OSPF learned routes into EIGRP. Which configuration achieves this goal?

• A. router eigrp 100address-family ipv4 redistribute ospf 1
• B. router eigrp 100redistribute ospf 1 route-policy OS_INTO_EIGroute-policy OS_INTO_EIG set eigrp-metric 100 10 255 1 155
• C. router eigrp 100address-family ipv4redistribute ospf 1 route-policy OS_INTO_EIGroute-policy OS_INTO_EIG set eigrp-metric 100 10 255 1 155
• D. router eigrp 100default-metric 100 1 255 1 1500redistribute ospf 1

Answer: C

NEW QUESTION 3
An engineer wants to use an address family to configure internal BGP peer 10.1.1.1 as a route reflector client for unicast and multicast prefixes. Which option accomplishes this configuration?

• A. router bgp 140address-family ipv4 unicast neighbor 10.1.1.1remote-as 140address-family ipv4 unicast route-reflector-clientexitaddress-family ipv4 multicast route-reflector-client
• B. router bgp 140 neighbor 10.1.1.1address-family ipv4 unicast address-family ipv4 multicast remote-as 150route-reflector-client exit
• C. router bgp 140address-family ipv4 unicast route-reflector-clientaddress-family ipv4 multicast remote-as 140neighbor 10.1.1.1
• D. router bgp 140address-family ipv4 unicast neighbor 10.1.1.1remote-as 150address-family ipv4 unicast route-reflector-clientexitaddress-family ipv4 multicast route-reflector-client

Answer: A

NEW QUESTION 4
An EIGRP domain is redistributed into an OSPF NSSA area. On which router would this redistribution occur?

• A. stub border router
• B. summary router
• C. autonomous system boundary router
• D. backbone router

Answer: C

NEW QUESTION 5
Refer to the exhibit.

Which configuration is correct for RX4 for an e-BGP session with R1?

• A. router bgp 100address-family ipv4 unicast!neighbor 10.10.14.1remote-as 10address- family ipv4unicastroute-policy POLICY in
• B. router bgp 100address-family ipv4 unicast!neighbor 10.10.14.1remote-as 100
• C. router bgp 100!neighbor 10.10.14.1remote-as 100
• D. router bgp 100!neighbor 10.10.14.1remote-as 10address-family ipv4 unicast

Answer: A

NEW QUESTION 6
What is defined by using the Cisco IOS XR policy-global configuration command?

• A. the default BGP route policy
• B. global variables that can be referenced by any route policy
• C. the global default route policy
• D. hierarchical route policy
• E. nested route policy

Answer: B

Explanation:
Global Configuration Mode Prompt: (config)
Enter global configuration mode from executive (EXEC) mode by using the configure command. Global configuration commands generally apply to the whole system rather than just one protocol or interface. You can enter all other configuration submodes listed in this section from global configuration mode.
RP/0/RP0/CPU0:router# configure RP/0/RP0/CPU0:router(config)#
Global Parameter Configuration Mode Prompt: (config-rpl-gl)
Enter global parameter configuration mode by using the policy-global command in global configuration mode.
In global parameter configuration mode, you can create or modify a global policy by entering successive commands and then terminating the configuration by entering the end- global command.
For example, to configure global parameters: RP/0/RP0/CPU0:router(config)# policy-global RP/0/RP0/CPU0:router(config-rp-gl)# glbpathtype ebgp RP/0/RP0/CPU0:router(config-rp-gl)# glbtag 100 RP/0/RP0/CPU0:router(config-rp-gl)# end-global

NEW QUESTION 7
A static default route has been inserted into the configuration of a Cisco IOS XE router. Which option advertises the route into the OSPF domain?

• A. router ospf 1 network 0.0.0.0 area 0 redistribute static subnets
• B. router ospf 1 redistribute static
• C. router ospf 1 redistribute static subnets
• D. router ospf 1 default-information originate

Answer: D

NEW QUESTION 8
Which AS path access list is used by a multihomed customer to only announce their own address space to their service providers to prevent the multihomed customer from becoming a transit AS?

• A. ip as-path access-list permit.*
• B. ip as-path access-list permit^$
• C. ip as-path access-list permit _$
• D. ip as-path access-list permit _^
• E. ip as-path access-list permit local-as ip as-path access-list deny *
• F. ip as-path access-list deny.* ip as-path access-list permit *

Answer: B

Explanation:

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NEW QUESTION 9
Refer to the exhibit.

R1 and XR2 cannot establish OSPF adjacency. Which option is the root cause of this issue?

• A. stub flag mismatch
• B. mismatched passwords
• C. process ID mismatch
• D. mismatched authentication types
• E. MTU mismatch

Answer: D

NEW QUESTION 10
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 AN
• D. match prefix list PL1 AND PL2 AND match the APACL1 AS path access list.
• E. 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.
• F. All routes that are not matched by the sequence 10 route map statement will be dropped.

Answer: AD

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

NEW QUESTION 11
Which series of commands configures area 1 as an OSPF totally stubby area on a Cisco IOS XR router?

• A. router ospfv3 1 router-id 10.10.10.1area 0interface GigabitEthernet 0/0/0/1 area 1stub no-summaryinterface GigabitEthernet 0/0/0/2
• B. router ospfv3 1 router-id 10.10.10.1default-information originate area 0interface GigabitEthernet 0/0/0/1 area 1stubinterface GigabitEthernet 0/0/0/2
• C. ipv6 prefix-list default permit ::0/0 router ospfv3 1router-id 10.10.10.1default-information originate area 0interface GigabitEthernet 0/0/0/1 distribute-list prefix-list default in area 1interface GigabitEthernet 0/0/0/2
• D. router ospfv3 1 router-id 10.10.10.1area 0interface GigabitEthernet 0/0/0/1area 1interface GigabitEthernet 0/0/0/2 no-summarypassive
• E. router ospfv3 1 router-id 10.10.10.1area 0interface GigabitEthernet 0/0/0/1 area 1stubinterface GigabitEthernet 0/0/0/2 default-cost 20

Answer: A

NEW QUESTION 12
Which three BGP configuration groupings are supported on Cisco IOS XR Software? (Choose three.)

• A. peer-group
• B. af-group
• C. bgp-group
• D. session-group
• E. neighbor-group
• F. as-group

Answer: BDE

Explanation:
•Commands relating to a peer group found in Cisco IOS Release 12.2 have been removed from Cisco IOS XR software. Instead, the af-group, session-group, and neighbor-group configuration commands are added to support the neighbor in Cisco IOS XR software:
–The af-group command is used to group address family-specific neighbor commands within an IPv4 or IPv6 address family. Neighbors that have the same address family configuration are able to use the address family group name for their address family- specific configuration. A neighbor inherits the configuration from an address family group by way of the use command. If a neighbor is configured to use an address family group, the neighbor will (by default) inherit the entire configuration from the address family group. However, a neighbor will not inherit all of the configuration from the address family group if items are explicitly configured for the neighbor.
–The session-group command allows you to create a session group from which neighbors can inherit address family-independent configuration. A neighbor inherits the configuration from a session group by way of the use command. If a neighbor is configured to use a session group, the neighbor (by default) inherits the session group's entire configuration. A neighbor does not inherit all the configuration from a session group if a configuration is done directly on that neighbor.
–The neighbor-group command helps you apply the same configuration to one or more neighbors. Neighbor groups can include session groups and address family groups. This additional flexibility can create a complete configuration for a neighbor. Once a neighbor group is configured, each neighbor can inherit the configuration through the use command. If a neighbor is configured to use a neighbor group, the neighbor (by default) inherits the
neighbor group's entire BGP configuration.
–However, a neighbor will not inherit all of the configuration from the neighbor group if items are explicitly configured for the neighbor. In addition, some part of the neighbor group's configuration could be hidden if a session group or address family group was also being used.

NEW QUESTION 13
DRAG DROP
Drag and drop the terms on the left onto the appropriate definition on the right.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Is a network that solely purchases transit from other networks to reach the Internet – Tier 3 ISP
Peers with some networks, but purchases IP transit or pays settlements to reach some portion of the Internet– Tier 2 ISP
Peers with other ISPs of the same Tier level to form the backbone of the Internet – Tier 1 ISP
Provides or sells access and bandwidth into its backbone infrastructure and network access points – NSP
Interconnects network service providers – NAP

NEW QUESTION 14
Refer to the exhibit.

R1 is advertising subnets 1.1.1.X/32 via eBGP. XR2 must accept only the first seven subnets in its BGP table. Which configuration must occur on XR2 to meet these parameters?

• A. route-policy INBOUND if destination in FILTER then pass endifrouter bgp 100 neighbor10.10.14.1 address-family ipv4 unicastroute-policy INBOUND in
• B. router bgp 100neighbor 10.10.14.1 address-family ipv4 unicastroute-policy FILTER in
• C. router bgp 100neighbor 10.10.14.1 address-family ipv4 unicastroute-policy SUBNETS in
• D. route-policy INBOUNDif destination in SUBNETS thenpass endifrouter bgp 100 neighbor 10.10.14.1 address-family ipv4 unicastroute-policy INBOUND in

Answer: A

NEW QUESTION 15
Refer to the show command output in the exhibit.

For which reason will this router drop all traffic that is destined to the 1.1.1.0/24 network?

• A. The 1.1.1.0/24 route is not synchronized.
• B. The BGP next hop for reaching the 1.1.1.0/24 network is not reachable.
• C. The metric of the 1.1.1.0/24 route is set to 0.
• D. The weight of the 1.1.1.0/24 route is set to 0.
• E. The 1.1.1.0/24 route is an incomplete route.
• F. The IBGP split-horizon rule is preventing the router to use the IBGP route.

Answer: B

NEW QUESTION 16
Which option is a characteristic of intermediate systems on multiarea IS-IS?

• A. Level 2 contains routing information only for the local area.
• B. Level 2 contains routing information only for stub areas.
• C. Level 1 contains routing information only for the backbone area.
• D. Level 1 contains routing information onlyfor the local area.

Answer: D

NEW QUESTION 17
Which RPLs can be used to conditionally advertise a default route based on the prefix 1.1.1.1 being in the routing table?

• A. route-policy RPL_Default_Originate if rib-has-route in (1.1.1.1/32)pass else drop endifend-policy
• B. route-policy RPL_Default_Originate if rib-has-route in (1.1.1.1/32)drop else pass endifend-policy
• C. route-policy RPL_Default_Originate if route in (1.1.1.1/32)pass else drop endifend-policy
• D. route-policy RPL_Default_Originate if not rib-has-route in (1.1.1.1/32)pass else drop endifend-policy

Answer: A

NEW QUESTION 18
Refer to the exhibit.

IS-IS adjacency is not established between XR2 and R1. Which action fixes this issue?

• A. unify IS-IS process IDs on each router
• B. configure on R1 under IS-IS is-type level-1-2
• C. configure on R1 under IS-IS area-password CISCO
• D. configure on XR2 under IS-IS under Gi0/0/0/0 address-family ipv4 unicast

Answer: D

NEW QUESTION 19
A network engineer is configuring IS-IS in Cisco IOS XR. Where is BFD configured?

• A. RP/0/RSP0/CPU0:router(config-isis-if)#
• B. RP/0/RSP0/CPU0:router(config)#
• C. RP/0/RSP0/CPU0:router(config-bfd)#
• D. RP/0/RSP0/CPU0:router(config-isis-if-af)#

Answer: A

NEW QUESTION 20
Refer to the IS-IS configuration exhibit.

This is the typical IS-IS configuration of the routers in an AS using IS-IS as the IGP. This AS is in the transition phase of integrating IPv6 into the network. During this transition phase, some of the routers within the AS might be running IPv4 only, some might be running IPv6 only, and others might be running both IPv4 and IPv6. To avoid any black holes for the IPv6 traffic, which configuration change can be made?

• A. Disable IS-IS adjacency checks.
• B. Enable IPv6 adjacency over IPv4 IS-IS peering.
• C. Enable multi-topology IS-IS.
• D. Disable the IPv4 unicast address-family.
• E. Enable IS-IS wide metric to support the single-topology mode.

Answer: C

NEW QUESTION 21
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

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NEW QUESTION 22
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