640-821 試験問題を無料オンラインアクセス

試験コード:640-821
試験名称:Introduction to Cisco Networking Technologies
認定資格:Cisco
無料問題数:91
更新日:2026-05-29
評価
100%

問題 1

A router receives a packet on interface 172.16.45.66/26. The source IP of the packet is
172.16.45.126/26 and the destination is 172.16.46.191/26. How will the router handle the packet?

問題 2

According to the information provided in the exhibit, from where was the currently running version of IOS loaded?

問題 3

A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

問題 4

Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?

問題 5

A network administrator is connecting PC hosts A and B directly through their Ethernet interfaces as shown in the graphic. Ping attempts between the hosts are unsuccessful.
What can be done to provide connectivity between the hosts? (Choose two.)

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