Question # 1 OSPF protocol needs to elect DR and BDR in which of the following network types? ()*
Point-to-multipoint
NBMA
Point-to-point type
Broadcast type
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Question # 2 The output information of a certain router is shown in the figure. Which of the following statements are correct? () (Multiple Choice Questions)
The DR priority of this routing interface is 10
The cost value of this interface is 1
This router is BDR
The Router ID of the router is 10.0.1.1
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The cost value of this interface is 1
This router is BDR
The Router ID of the router is 10.0.1.1
Question # 3 Is there any correct statement about the TTL field in the IPv4 header? ()
The range of TTL value is 0-255
Each time a message passes through a three-layer device. TL value minus 1
TTL value length is 8bit
When routing loops occur, the TL value can be used to prevent data packets from being forwarded indefinitely
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The range of TTL value is 0-255
Each time a message passes through a three-layer device. TL value minus 1
TTL value length is 8bit
When routing loops occur, the TL value can be used to prevent data packets from being forwarded indefinitely
Question # 4 The function of the 0SPF hel1o message is ()
Neighbor discovery
Maintain neighbor relations
Update LSA. Information
Synchronize the LSDB of the router
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Neighbor discovery
Maintain neighbor relations
Question # 5 Which of the following refers to network communication? ()*
Use instant messaging software (such as: QQ. WeChat) to chat with friends
Use a computer to access the company's official website
Use computer to watch videos online
Download emails from the company mailbox to your computer
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Use instant messaging software (such as: QQ. WeChat) to chat with friends
Use a computer to access the company's official website
Use computer to watch videos online
Download emails from the company mailbox to your computer
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