An engineer working for telecommunication company needs to secure the LAN network using a prefix list.
Which best practice should the engineer follow when he implements a prefix list?
Click on the arrows to vote for the correct answer
A. B. C. D.D.
A prefix list is a tool used in network routing to filter and control the traffic flow based on the source or destination IP address. When implementing a prefix list to secure a LAN network, there are some best practices that engineers should follow to ensure that the network is properly protected. Let's discuss each answer option in detail:
A. An engineer must identify the prefix list with a number only.
This answer option is incorrect. While a prefix list can be identified with a number, it is not the only way to do so. Engineers can also use a name to identify a prefix list. In fact, using a name can be more descriptive and easier to understand than using a number.
B. The final entry in a prefix list must be /32.
This answer option is also incorrect. While it is true that a /32 prefix will match a single host IP address, it is not necessary for the final entry in a prefix list. Engineers can use any prefix length in a prefix list, depending on their requirements.
C. An engineer must include only the prefixes for which he needs to log activity.
This answer option is incorrect as well. Prefix lists are primarily used for filtering and controlling traffic flow, not for logging activity. While it is possible to configure a prefix list to log activity, it is not a best practice to include only the prefixes for which activity needs to be logged.
D. An engineer must use nonsequential sequence numbers in the prefix list so that he can insert additional entries later.
This answer option is also incorrect. While it is true that engineers can use nonsequential sequence numbers in a prefix list, it is not a best practice. In fact, using nonsequential sequence numbers can make the prefix list harder to read and understand. A better practice is to use sequential sequence numbers and leave enough space between entries to insert additional entries later if needed.
In summary, when implementing a prefix list to secure a LAN network, engineers should follow the best practices of using descriptive names to identify the prefix list, using any prefix length as needed, using prefix lists primarily for filtering and controlling traffic flow, and using sequential sequence numbers in the prefix list to make it easier to read and understand.