Networking - Security - Discussion

Discussion :: Security - Security (Q.No.16)

16. 

Which of the following are valid ways to refer only to host 172.16.30.55 in an IP access list?

  1. 172.16.30.55 0.0.0.255
  2. 172.16.30.55 0.0.0.0
  3. any 172.16.30.55
  4. host 172.16.30.55
  5. 0.0.0.0 172.16.30.55
  6. ip any 172.16.30.55

[A]. 1 and 4
[B]. 2 and 4
[C]. 1, 4 and 6
[D]. 3 and 5

Answer: Option B

Explanation:

The wildcard 0.0.0.0 tells the router to match all four octets. This wildcard format alone can be replaced with the host command.

Gidion Mibaluro said: (May 15, 2015)  
How to calculate the number of host? Please give me the formula, I want to know it please.

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