What are the differences between traffic policing and traffic shaping?

For traffic shaping, you can adjust the usage of the buffer for the traffic that exceeds the CIR.
For traffic policing, you can adjust the usage of the buffer for the traffic that exceeds the CIR.
For traffic shaping, the router buffers excess packets until the bandwidth is available again.
Traffic policing uses the token bucket algorithm and traffic shaping uses the SPD algorithm.
Traffic shaping is applied in the inbound direction and traffic policing is applied in the outbound direction.

Answer(s): C

Which of the following statements regarding URPF, IPSG, and DAI are false?

IPSG checks the source IP addresses and source MAC addresses of IP packets, and DAI checks only the mapping between IP addresses and MAC addresses.
DAI binding entries cannot be manually configured.
URPF can be used to defend against DDoS attacks from forged sources.
IPSG checks IP packets to defend against attacks using spoofed source IP addresses, and DAI checks ARP packets to filter out attack sources.

Answer(s): C

By default, WRED is configured on a newly deployed Huawei router. Which of following statements regarding WRED are true?

When traffic exceeds the minimum threshold, WRED starts to discard all inbound traffic (tail drop).
Traffic with low bandwidth is more likely to be discarded than traffic with high bandwidth.
WRED selectively discards multiple TCP flows to avoid global synchronization.
WRED can be used to set different drop thresholds and packet loss rations for data packets with different priorities.

Answer(s): D

Which of the following statements regarding RADIUS are true?

Authentication, authorization, and accounting are separated in RADIUS protocol.
RADIUS authentication, and Portal authentication cannot be used together because users can be authenticated using the Portal server when Portal authentication is enabled.
MAC address authentication does not require a user name and password. Therefore, users cannot be authenticated through RADIUS when using MAC address authentication.
RADIUS supports user access in wired and wireless modes.

Answer(s): D

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