Cisco 200-125 Exam

An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP properties box for the sales server?

  • A. IP address: 192.168.20.14 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.9
  • B. IP address: 192.168.20.254 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.20.1
  • C. IP address: 192.168.20.30 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.25
  • D. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.17
  • E. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.25
Answer: Option C.
Explanation: 

A /29 network has only 8 IP addresses, of which 6 are usable IP addresses. This means that 192.168.20.24 represents the network, 192.168.20.25 is the first usable IP address, 192.168.20.30 is the last usable IP address and 192.168.20.31 is the broadcast address on the network. Another way to write /29 is
255.255.255.248, so the answer is C.

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