GB0-191-ENU 무료 덤프문제 온라인 액세스

In the switching network shown in the figure, all switches have enabled the STP protocol.

According to the information in the figure, which switch will be selected as the root bridge?

• A.SWC
• B.SWA
• C.Insufficient information, unable to judge
• D.SWB

The two routers MSR-1 and MSR-2 are interconnected through the S0/0 interface, and the two routers learn the routes of the LAN segment by running the RIP protocol.
See the following configuration commands on MSR-1:
[MSR-1-Serial0/0] rip authentication-mode md5 rfc2453 H3C
Then the correct interpretation of this command is ______. (Multiple choice)

• A.Configure RIP to use MD5 cipher text authentication
• B.Specify the message format specified by RFC2453 for MD5 authentication
• C.Configure RIP to use MD5 plaintext authentication
• D.Specify the H3C private extended protocol message format for MD5 authentication

For the understanding of packet switching, the correct one of the following statements is ______. (Multiple choice)

• A.Each packet carries the address identification of the receiver and the sender, and the packet can be forwarded directly without any operation, thereby improving efficiency
• B.The transmitted information is divided into packets of a certain length and forwarded in units of packets
• C.Packet switching is a switching method based on cut-through switching
• D.Packet switching includes frame-based packet switching and cell-based packet switching

The following description of Trunk ports and links is wrong. ______. (Multiple choice)

• A.The PVID value of the Trunk port cannot be modified
• B.The data frames transmitted on the Trunk link are all with VLAN ID
• C.Trunk link can carry data frames with different VLAN IDs
• D.When the Trunk port sends a data frame, if the data frame does not have a VLAN ID, add the corresponding PVID value to the data frame as the VLAN ID

The default subnet mask for class B addresses is ______.

• A.255.255.0.0
• B.None of the above is correct
• C.255.0.0.0
• D.255.255.255.0