When the network administrator tried to access the internal network device through Telnet, it was found that it could not be accessed. Which of the following is not the likely cause?

• A.The route is unreachable, and the client and server cannot establish a TCP connection
• B.ACL is bound in the VTY user interface
• C.The number of users logged into the device has reached the upper limit
• D.The protocol inbound all is configured on the VTY user interface

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Which statement is correct about this configuration? (Multiple choice)
[Quidway]dhcp enable[Quidway]interface vlanif 10[Quidway-Vlanif10]ip addres 10.1.1.1255.255255.128[Quidway-Vlanif10]dhcp select gloal[Quidway-Vlanif10]quit[Quidway]dhcp server ping packets 10

• A.This command is to configure the clients under the VLANIF10 interface to obtain IP addresses from the global support
• B.This command is used to configure and enable DHCP service
• C.The maximum number of ping packets received by the DHCP server is 10
• D.The interface address pool has priority over the global address allocation. That is, if there is an interface address pool on the interface, even if the global address pool also exists, the client will give priority to obtaining addresses from the interface address pool.
• E.The maximum number of ping packets sent by the DHCP server is 10

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Assuming that the neighbor relationship between BGP routers has been established successfully, the configuration on R1 is as shown in the figure.

Which router can the routing entry 10.10.10.0/24 published by 1 be delivered to the farthest?

• A.R3
• B.R1
• C.R4
• D.R2

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Which description is correct about the characteristics of a high-availability network? (Multiple choice)

• A.Quick recovery after failure
• B.Cannot fail frequently
• C.will not fail
• D.Once a failure occurs, the business can only be restored through manual intervention

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DHCP Relay is also known as DHCP relay. If DHCP Relay needs to be configured, which of the following steps need to be included? (Multiple choice)

• A.Configure the interface number and the IP address of the interface to enable the DHCP Relay function
• B.Configure option82 insertion function
• C.Configure the group name of the DHCP server group
• D.Configure the IP address of the DHCP server in the DHCP server group

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