The Router ID of the OSPF process takes effect immediately after modification.

• A.False
• B.True

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The configuration of the country code will affect the actual transmission frequency and maximum transmission power.

• A.False
• B.True

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As shown in the information in the figure, when learning this switch needs to forward the frame with the destination MAC address of 5489-98ec-f011, which of the following description is correct?

• A.The switch does not find a matching entry in the MAC address table, so it will discard the frame
• B.The switch will flood the frame on all ports except the port that received the frame
• C.The switch needs to send a request to discover the device with the MAC address of 5489 98ec-f011
• D.The switch will send a message that the destination is unreachable to the source device

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vty configuration as shown in the figure, the user authority level is set to level 3.
[Huawei]user-interface vty o 14
[Huawei-ul-vtyo-14]acl 200o inbound
[Huavei-ui-vtyo-14]user privilege level 3
[Huavei-ui-vtyo-14]authentication-node password Please configure the login password (maxim length 16):huawei

• A.False
• B.True

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Which of the following statement about the transport layer protocol is correct? (Multiple choice)

• A.UDP uses the STNOACK flag to request and confirm the establishment of a connection
• B.TCP establish a connection is a three-way handshake process, TCP terminates the connection will have to go through four-way handshake
• C.UDP is suitable for the transmission of delay-sensitive traffic, and can be reorganized according to the sequence number field in the message header
• D.The range of well-known port numbers is 0-1023

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