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Exam 100-105 topic 1 question 173 discussion

Actual exam question from Cisco's 100-105
Question #: 173
Topic #: 1
[All 100-105 Questions]

Refer to the exhibit. A network associate has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF. Which three of the interfaces shown in the exhibit will participate in OSPF according to this configuration statement? (Choose three.)

  • A. FastEthernet0 /0
  • B. FastEthernet0 /1
  • C. Serial0/0
  • D. Serial0/1.102
  • E. Serial0/1.103
  • F. Serial0/1.104
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Suggested Answer: BCD 🗳️
The "network 192.168.12.64 0.0.0.63 equals to network 192.168.12.64/26. This network has:
+ Increment: 64 (/26= 1111 1111.1111 1111.1111 1111.1100 0000) + Network address:
192.168.12.64
+ Broadcast address: 192.168.12.127
Therefore all interface in the range of this network will join OSPF.
by [deleted] at April 2, 2025, 2:53 p.m.

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