H12-821_V1.0 Practice Questions

A.  

After a stack splits, the MAC addresses of the two stacks change immediately.

B.  

If the master and standby switches are still in the same stack after the stack splits, the slave switches separated from the original master and standby switches re-elect the master and standby switches due to protocol packet timeout.

C.  

If the master and standby switches are in two stacks after the split, the stack where the original master switch resides updates the topology and selects a new standby switch. The original standby switch becomes the master switch in the new stack and a new standby switch is elected.

D.  

After a stack splits, multiple stacks have the same IP address and MAC address. To prevent network faults, the stacks perform MAD detection. The stack that fails the MAD detection shuts down all physical ports except reserved ports.

A.  

TRUE

B.  

FALSE

A.  

TRUE

B.  

FALSE

A.  

Load balancing

B.  

Improved reliability

C.  

Increased link bandwidth

D.  

Route backup

A.  

User passwords can be processed using PAP or CHAP.

B.  

By default, the MAC address of a terminal is used as the user name and the last 6 hexadecimal digits of the terminal MAC address are used as the password for MAC address authentication.

C.  

No client software needs to be installed on user terminals.

D.  

A MAC address authentication system consists of three types of entities: terminal, access device, and authentication server.

A.  

Index of the prefix list

B.  

Longest mask length to be matched

C.  

Shortest mask length to be matched

D.  

Mask length

A.  

10.1.1.1/32

B.  

10.1.1.0/6

C.  

10.1.1.0/24

D.  

10.0.0.0/16

A.  

TRUE

B.  

FALSE

A.  

After a high priority is configured for BFD packets, BFD packets are preferentially forwarded.

B.  

To quickly learn about the network status and performance requirements, you can set the interval for sending BFD packets to the minimum value.

C.  

On a live network, some devices switch traffic only when a BFD session changes to the Up state. If a routing protocol goes Up later than an interface, no route is available for switching traffic back, leading to traffic loss. To resolve this issue, configure a delay to compensate for the time difference caused when the routing protocol goes Up later than the interface.

D.  

If a BFD session flaps, master/backup switchovers are frequently performed on the application associated with the BFD session. To prevent this, set the WTR time of the BFD session.

A.  

UDP port 3784

B.  

UDP port 4784

C.  

TCP port 3784

D.  

TCP port 4784