If it is UDP, the value of the protocol field of the network layer is 6 ()

• A.False
• B.True

Comment: *

Name: *

Email: *

Verification: *

Which frequencies does IEEE802.11n support? ()

• A.2.4GHz
• B.5GHz
• C.2.5GHz
• D.6GHz

Comment: *

Name: *

Email: *

Verification: *

How many planes does a network device have? ()*

• A.Control plane
• B.Data plane
• C.Business plane
• D.Management plane

Comment: *

Name: *

Email: *

Verification: *

The administrator cannot log in to the Huawei router through Telnet, but other administrators can log in normally. What are the possible reasons for the following items? ()

• A.The administrator user account has been deleted
• B.The authority level of the administrator user account has been modified to 0
• C.The administrator user account has been disabled
• D.The Telnet service of the AR2200 router has been disabled

Comment: *

Name: *

Email: *

Verification: *

Is there any correct statement about the TTL field in the IPv4 header? ()

• A.TTL value length is 8bit
• B.Each time a message passes through a three-layer device. TL value minus 1
• C.The range of TTL value is 0-255
• D.When routing loops occur, the TL value can be used to prevent data packets from being forwarded indefinitely

Comment: *

Name: *

Email: *

Verification: *