What would be the effect of issuing the command access-group 115 in on the s0/0/1 interface?

Scenario

An administrator is trying to ping and telnet from Switch to Router with the results shown below:

Click the console connected to RouterC and issue the appropriate commands to answer the questions.
For this question-we only need to use the show running-config command to answer all the questions below:
Router>enable
Router#show running-config




What would be the effect of issuing the command access-group 115 in on the s0/0/1 interface?
A. No host could connect to Router through s0/0/1
B. Telnet and ping would work but routing updates would fail.
C. FTP, FTP-DATA, echo, and www would work but telnet would fail
D. Only traffic from the 10.4.4.0 network would pass through the interface

Correct Answer: A
Explanation/Reference:

The above command will only the IP (0.0.0.0). Also there is no such IP address exists.
The wildcard mask of access-list 115 is 255.255.255.0, means that only host with IP addresses x.x.x.0 will be accepted. If the 4th part of an IP address is 0, then definitely it would be a network address. So no host can communicate with other network using S0/0/1 interface.
But it will accept the packet with source IP address – 10.10.0.0/8. The 4th octet is 0, and is not a network address but a valid IP address. So confusion… confusion… Anyhow other 3 choices (B, C, D) will definitely not the answer and Choice A is closest to the result, So the Answer is A.

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