H12-821 Online Practice Questions and Answers

A switch runs MSTP. The configuration is shown in the figure. What is the role of this switch in MSTI 1?

A. Uncertain

B. Root switch

C. Non-root switch

D. Secondary root switch

Which of the following statements regarding the firewall zone security level is false?

A. The configured security level cannot be changed.

B. Two zones cannot be configured with the same security level.

C. The default security level of the new zone is 1.

D. Only the security level of the user-defined zone can be configured.

Which of the following statements regarding the LSA age field are true?

A. The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.

B. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again.

C. The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time.

D. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.

ON a stateful inspection Firewall where there is no session table, when the status detection mechanism is enabled and the second packet (CYN+ACK) of 3-way hadshakes reaches the firewall. Which of the following statements is true?

A. If the firewall security policy permits packets to pass, the session table is created.

B. By default, when status detection is disabled and the permit policy is configured packets can pass.

C. Packets must pass the firewall, and a session table is established.

D. If the firewall security policy permits packets to pass, the packets can pass the firewall.

A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane?

A. Voltage monitoring

B. Temperature monitoring

C. Fan control

D. System power-on and power-off control

What parameters can a DHCP6 server assign to a DHCPv6 client?

A. Gateway address

B. DNS server address

C. IPV6 address/prefix

D. SNTP server address

Which of the following statements about multicast packet forwarding is true?

A. If a multicast data packet fails the RPF check, the packet must have been received through a sub-optimal interface. However, this interface still receives and forwards the multicast traffic downstream.

B. IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.

C. The source address of a multicast packet is a unicast address.

D. In multicast transmission, the destination address of a packet can be the unicast address of a host.

An engineer sets the CAPWAP heartbeat detection interval to 20 of the active link before an active/standby switchover occurs?

A. 75s

B. 20s

C. 60s

D. 90s

In a route-policy, which of the following BGP attributes can be used in apply clauses?

A. MED

B. AS_Path

C. Tag

D. Local-Preference

If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.

A. TRUE

B. FALSE