300-420 Question 306
Select 3An organization is designing a network to support periodic publication of routing updates between two remote sites connected over a WAN. Which of the following considerations should be prioritized when configuring periodic publication of routing information to ensure network efficiency and stability?
- A
Choose an optimal interval for periodic updates to avoid excessive network traffic.
- B
Ensure the routing protocol supports triggered updates instead of relying solely on periodic updates.
- C
Configure route summarization to minimize the size of the updates being transmitted.
- D
Disable periodic updates to reduce unnecessary communication over the WAN.
- E
Use a high-frequency periodic update interval to ensure real-time routing changes are reflected.
Show answer and explanation
Correct answers: A, B, C
Explanation
Periodic publication of routing updates is crucial for maintaining accurate routing tables across a network. However, to ensure network efficiency and stability, it's important to optimize the interval of updates, leverage features like triggered updates to avoid unnecessary traffic, and implement route summarization to reduce the size of routing advertisements. Disabling periodic updates or using excessively frequent updates can negatively impact network performance.
- A. Correct.
Choosing an optimal interval for periodic updates helps balance the trade-off between routing update timeliness and WAN bandwidth usage. Excessively frequent updates can overload the WAN, while updates that are too infrequent may cause stale routing information.
- B. Correct.
Routing protocols that support triggered updates (in addition to periodic updates) can optimize network efficiency by sending updates only when necessary, reducing unnecessary WAN traffic.
- C. Correct.
Route summarization reduces the size of periodic updates by aggregating routes into a single advertisement, which minimizes WAN bandwidth consumption and improves network stability.
- D. Incorrect.
Disabling periodic updates entirely would prevent the routing protocol from working as intended and could lead to stale routing information, which would compromise network reliability.
- E. Incorrect.
Using a high-frequency periodic update interval can unnecessarily increase network traffic, leading to WAN congestion and inefficient use of resources.