Assume that there are four flows a, b, c, and d each of which are 50M, and the total port bandwidth is 100M. Traffic congestion occurs, and congestion management is performed on it. Among them, traffic a belongs to PQ queue scheduling, traffic b, c, and d belong to WFQ queue scheduling, and the weight ratio is 1:2:2. Regarding the description of the scheduling results of the four flows, which is wrong? (Multiple choice)

• A.Traffic a passes 100M
• B.Flow b passes through 10M, flow c and d pass through 20M
• C.Flow b passes through 25M, flow c and d pass through 12.5M
• D.Traffic a passes 50M

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DHCP REQUEST message must be sent in the form of broadcast.

• A.False
• B.True

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The Tos field is used for QoS marking in the IP message, and the first 6 bits of the Tos field are used to mark the DSCP.

• A.False
• B.True

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On serial interfaces, static routing can be configured by specifying the next-hop address or outgoing interface.

• A.False
• B.True

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Which of the following IEEE802.11 standards support 2.4G and 5G? (Multiple choice)

• A.802.11ac
• B.802.11g
• C.802.11n
• D.802.11ax

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