You want to create a standard access list that denies the subnet of th...
First, you must know that a /19 is 255.255.224.0, which is a block size of 32 in the third octet. Counting by 32, this makes our subnet 192 in the third octet, and the wildcard for the third octet would be 31 since the wildcard is always one less than the block size.
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You want to create a standard access list that denies the subnet of th...
Explanation:
Access List:
- An access list is a set of rules used on a router to control traffic that is allowed to pass through the router and reach its destination.
Standard Access List:
- A standard access list is used to filter traffic based on the source IP address only.
Denying Subnet:
- In this case, we want to deny the subnet of the host 172.16.198.94/19.
Starting the List:
- To deny the subnet 172.16.198.94/19, we need to start our access list with the network address 172.16.192.0 and wildcard mask 0.0.31.255.
Correct Option:
- The correct option to start the access list would be:
- access-list 10 deny 172.16.192.0 0.0.31.255
Explanation:
- This access list entry denies all hosts in the subnet range 172.16.192.0 to 172.16.223.255, which includes the subnet of the host 172.16.198.94/19.