Cisco 644-906 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 644-906
Exam Name/Title: Implementing and Maintaining Cisco Technologies Using IOS XR
Certification Provider: Cisco
Corresponding Certification: Cisco Specialist

Exam Questions: 77
Updated On: Jul 19, 2026

Question #1

In which two ways do you set the maximum number of Telnet sessions to 10? (Choose two.)

A. telnet max-servers 10

B. telnet ipv4 server max-servers 10

C. telnet ipv4 max-servers 10

D. telnet vrf default ipv4 server max-servers 10

Discussion 0

Correct Answer: B,D Vote an answer

Question #2

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 neighbor 1.1.1.1 remote-as 2000 address-family vpnv4 unicast ! address-family vpnv6 unicast ! !

B. router bgp 1000 address-family ipv4 unicast ! address-family ipv6 unicast ! !

C. router bgp 1000 neighbor 1.1.1.1 remote-as 2000 address-family ipv4 unicast ! address-family ipv6 unicast ! !

D. router bgp 1000 address-family vpnv4 unicast ! address-family vpnv6 unicast ! !

Discussion 0

Correct Answer: B Vote an answer

Question #3

Which uRPF mode specifies that the source address of the packet is checked against the FIB to make sure that it is being received on the interface that is selected as the best path to this source address?

A. strict mode

B. symmetric mode

C. loose mode

D. asymmetric mode

Discussion 0

Correct Answer: A Vote an answer

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Question #4

Which of the following QoS criteria cannot be configured on a policy map that is applied in the ingress direction on a Cisco CRS-1 interface in Cisco IOS XR Software?

A. bandwidth

B. priority

C. set qos-group

D. police

E. shape average

F. random-detect

Discussion 0

Correct Answer: A Vote an answer

Question #5

How would MPLS Label Distribution Protocol, Graceful Restart be configured on TenGigE 0/0/0/1?

A. Interface Ten0/0/0/1 mpls ip Graceful-restart

B. mpls ldp address-family ipv4 unicast mpls ip graceful-restart

C. router ospf interface Ten 0/0/0/1 address-family ipv4 uni mpls ip graceful-restart

D. mpls ldp graceful restart interface Ten 0/0/0/1

Discussion 0

Correct Answer: D Vote an answer

Question #6

HOTSPOT

Discussion 0

Correct Answer:

Question #7

Which two of the following are correct commands to activate the PIE file <hfr-mgbl-p.pie4.0.1>? (Choose two.)

A. install add disk0:hfr-mgbl-p-4.0.1 activate

B. install activate disk0:hfr-mgbl-p.pie-4.0.1

C. install activate tftp://172.20.165.36/hfr-mgbl-p.pie-4.0.1

D. install add tftp://172.20.165.36/hfr-mgbl-p.pie-4.0.1 activate

Discussion 0

Correct Answer: B,D Vote an answer

Question #8

What are the three potential use cases of NetFlow in an actual network deployment? (Choose three.)

A. providing a means for traffic accounting and billing for customers

B. providing deep application inspections and controls

C. identifying the traffic source and destination for optimizing peering and transit links

D. providing the network telemetry for identifying and mitigating DDoS attacks

E. providing traffic traces that are comparable to what is provided by a packet sniffer and RMON

Discussion 0

Correct Answer: A,C,D Vote an answer

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