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2021 Dec 644-906 pdf:
Q21. Which two commands will allow you to check if interface Bundle-Ether1 has ACL Ethernet_In applied to its ingress? (Choose two.)
A. show access-list ipv4 Ethernet_In
B. show interface Bundle-Ether1 access-list
C. show running-config interface Bundle-Ether 1
D. show running-config ipv4 access-list Ethernet_In
E. show ipv4 interface Bundle-Ether 1
Answer: C,E
Q22. Which Cisco IOS XR only command will show the status of IPv4 interfaces that have been configured under the OSPF process?
A. show ospf interface
B. show ipv4 ospf interface
C. show ip ospf interface
D. show ospf interface all
E. show ospfv3 interface
F. show ospf address-family
Answer: A
Q23. What are the two commands to show all log entries except BGP or configuration-related ones? (Choose two.)
A. show log | excl [BGP,CONFIG]
B. show log | excl BGP | excl CONFIG
C. show log | excl (BGP,CONFIG)
D. show log | excl "BGP|CONFIG"
Answer: B,D
Q24. What are the two minimum tasks and configurations that are required for the forwarding of multicast traffic using Source-Specific Multicast? (Choose two.)
A. installing services PIE on the router
B. installing multicast PIE on the router
C. configuring multicast-routing on interfaces
D. configuring PIM on interfaces
Answer: B,C
Q25. Which Cisco IOS XR show command is used to display the IPv4 BGP table?
A. show bgp
B. show bgp summary
C. show bgp neighbors
D. show route bgp
E. show bgp vpnv4
F. show bgp table
Answer: A
Latest 644-906 actual test:
Q26. Referring to the configuration output exhibit, which set of commands below will allow you to insert a new line just before the permit any statement?
A. :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)# 2.5 deny udp any eq tftp any
B. :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)# insert after 2 deny udp any eq tftp any
C. :router #resequence access-list ipv4 Ethernet_In :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)#25 deny udp any eq tftp any
D. :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)#move 3 to 4 :router(config-ipv4-acl)#3 deny udp any eq tftp any
Answer: C
Q27. What is the correct Cisco IOS XR command to configure an autonomous system number 1000 for BGP and to support IPv4, IPv6, and unicast routing?
A. router bgp 1000 address-family ipv4 unicast ! address-family ipv6 unicast ! !
B. router bgp 1000 neighbor 1.1.1.1 remote-as 2000 address-family ipv4 unicast ! address-family ipv6 unicast ! !
C. router bgp 1000 address-family vpnv4 unicast ! address-family vpnv6 unicast ! !
D. router bgp 1000 neighbor 1.1.1.1 remote-as 2000 address-family vpnv4 unicast ! address-family vpnv6 unicast ! !
Answer: A
Q28. In which two ways do you set the maximum number of Telnet sessions to 10? (Choose two.)
A. telnet vrf default ipv4 server max-servers 10
B. telnet ipv4 server max-servers 10
C. telnet max-servers 10
D. telnet ipv4 max-servers 10
Answer: A,B
Q29. In order to determine the hardware and firmware revision of a linecard, what is the correct command that should be invoked?
A. RP/0/RP0/CPU0:CRS-MC#show version
B. RP/0/RP0/CPU0:CRS-MC#show platform
C. RP/0/RP0/CPU0:CRS-MC(admin)#show platform
D. RP/0/RP0/CPU0:CRS-MC#show diagnostic summary
E. RP/0/RP0/CPU0:CRS-MC(admin)#show diag details
Answer: E
Q30. Which statement is false?
A. The NTP stratum describes how many hops away that a system is from an authoritative time source.
B. A Cisco IOS XR device can be directly connected to an atomic clock and provide a stratum 1 service.
C. A Cisco IOS XR device can be configured as a stratum 1 master clock source.
D. UTC is a global time scale that is distributed by atomic clocks over the Internet, over specialist long-wave radio transmissions, or with the Global Positioning System (GPS) network.
Answer: B