Corporation XYZ is enabling multicast on its WLANs in order to enable company meetings to be streamed to employee laptops.
The company wishes to block specific unwanted multicast traffic from traversing the wireless network.
What is the best way to filter multicast traffic going toward wireless clients?
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A. B. C. D.D.
Multicast traffic is used to send data from a single source to multiple recipients simultaneously. In the context of wireless networks, it can be used for various purposes, such as video conferencing, multimedia streaming, and online gaming. However, in some cases, certain types of multicast traffic may not be desirable, and network administrators may want to block them from traversing the wireless network.
In the scenario presented in the question, Corporation XYZ is enabling multicast on its WLANs to stream company meetings to employee laptops. However, the company also wants to block specific unwanted multicast traffic from traversing the wireless network. To achieve this goal, the network administrator has several options, as presented in the answer choices:
A. Use a WLC ACL on the management interface: A WLC (Wireless LAN Controller) ACL (Access Control List) is a set of rules that can be applied to control the traffic that is allowed or denied to pass through the WLC. The management interface of the WLC is used for administrative purposes and is not typically used for user data traffic. Therefore, using a WLC ACL on the management interface would not be effective in filtering multicast traffic going towards wireless clients. This option can be eliminated.
B. Use a CPU ACL on the WLC: A CPU (Central Processing Unit) ACL is a type of ACL that is applied to control traffic that is sent to the CPU of the WLC. The CPU of the WLC is responsible for processing control traffic, such as management and signaling messages, as well as user data traffic. While a CPU ACL can be used to filter multicast traffic going towards wireless clients, it may not be the most efficient solution. Filtering traffic at the CPU level can consume processing resources and may impact the performance of the WLC. This option may be less preferred.
C. Use a WLC ACL on the dynamic interface for all WLANs: A dynamic interface is a logical interface that is created dynamically by the WLC for each WLAN. A WLC ACL can be applied to a dynamic interface to control the traffic that is allowed or denied to pass through the interface. Applying a WLC ACL on the dynamic interface for all WLANs can be an effective way to filter multicast traffic going towards wireless clients. This option may be a good choice.
D. Use an ACL on the first-hop router: The first-hop router is the router that is the first point of contact for traffic leaving the wireless network. Applying an ACL on the first-hop router can be an effective way to filter multicast traffic going towards wireless clients. However, this option requires that the first-hop router be configured to support multicast filtering, which may not always be the case. This option may be a viable choice if the first-hop router supports multicast filtering.
In summary, the best way to filter multicast traffic going towards wireless clients depends on the specific network configuration and requirements. Based on the answer choices provided, using a WLC ACL on the dynamic interface for all WLANs may be the most practical and efficient option.