Free Cisco 640-878 Exam Dumps Questions & Answers


Exam Code/Number:	640-878Join the discussion
Exam Name:	Building Cisco Service Provider Next-Generation Networks Part 2
Certification:	Cisco
Free Question Number:	126
Publish Date:	Aug 25, 2026
# of views:	3501
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Total 126 questions

Question 1

Your switch network has been configured to support multiple VLANs. In order for the users on one VLAN to communicate with users on another VLAN, which additional configuration is required?

A.Enable inter-VLAN routing on a router or on a Layer 3 capable switch
B.Enable a routing protocol like EIGRP on a router or on a Layer 3 capable switch
C.Enable IP routing on a Layer 2 switch
D.Enable a switch virtual interface on the router, using the interface vlan global configuration command
E.subinterface configuration command
F.Enable a switch virtual interface on the switch, using the encapsulation dot1q

Question 2

Which configuration error within an AS can cause a Cisco IOS XR router to not announce certain prefixes to its EBGP peers?

A.Some prefixes were set with a MED of 0.
B.Some prefixes were mistagged with the no-export BGP community.
C.The inbound BGP route policy has only set actions that are defined without any pass actions that are defined.
D.The outbound BGP route policy has only set actions that are defined without any pass actions that are defined.

Question 3

A network administrator is troubleshooting an issue whereupon they able to ping the web server, but unable to web browse to the same web server. When the administrator telnets to the webserver on port 80, the administrator gets a connection refused message. At which three layers of the OSI model does the problem exist? (Choose three.)

A.Layer 4
B.Layer 3
C.Layer 2
D.Layer 7
E.Layer 6
F.Layer 1
G.Layer 5

Question 4

Refer to the show command exhibit.

Which statement is true?

A.It shows the contents of the uncommitted configuration.
B.It shows the contents of the failed configuration.
C.It shows the contents of the running configuration.
D.It shows the result of the target configuration merged with the running configuration.

Question 5

Cisco IP NGN service providers can offer multiple services to their customers by using which type of technology in their core networks?

A.PBB
B.Frame Relay
C.SONET/SDH
D.IP/MPLS
E.ATM