H12-821 Online Practice Questions and Answers

DRAG DROP

What is the correct procedure for a VLAN pool to assign terminals to VLANs.

Select and Place:

Which of the following statements regarding OSPF route summarization is false?

A. OSPF supports two route summarization modes: ABR summarization and ASBR summarization.

B. Any router in OSPF can summarize routes.

C. Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas.

D. Route summarization can reduce routing information, decrease the routing table size, and improve router performance.

Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.

A. 30

B. 3.3

C. 10

D. 40

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 DR/BDR are false?

A. In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.

B. DR others listen on the multicast address 224.0.0.5.

C. All DR others establish neighbor relationships with DR and BDR only.

D. DR others listen on the network address 224.0.0.6.

Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?

A. 802.11ac

B. 802.11n

C. 802.11ax

D. 802.11b

When two routers exchange LSDB information using DD packets, a master/slave relationship is formed first, the router with a larger router ID is the master, and determine the MS bit.

A. TRUE

B. FALSE

Which of the following attacks is not the network layer attack?

A. IP spoofing attack

B. ICMP attack

C. Smurf attack

D. ARP spoofing attack

Which of the following statements regarding IGMPv1 and IGMPv2 are true?

A. 1GMPv2 supports only general query.

B. 1GMPv2 defines the Leave message type.

C. IGMPv1 does not define the IGMP Leave message type.

D. IGMPv1 supports general query.

Which of the following statements regarding the stateful inspection firewall is true?

A. When the stateful inspection firewall checks packets, packets of one same connection are not correlated.

B. Because UDP is a connectionless protocol, so the stateful inspection firewall cannot match UDP packets with the status table.

C. The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table.

D. The stateful inspection firewall needs to match the rules for each incoming packet.

Which of the following statements regarding BGP route advertisement are false?

A. All the BGP routes learned from all BGP peer will be advertised to other BGP peers.

B. Only the optimal routes preferred by BGP can be advertised to other BGP peers.

C. By default, the routes learned from an IBGP peer will not be forwarded to other IBGP peers.

D. Only the routes learned from IGPs can be advertised to other BGP peers.

After which of the following parameters are modified does an IS-IS neighbor relationship need to re-established?

A. The cost of an IS-IS interface is changed.

B. The IP address of an ISIS interface is changed.

C. The level of an ISIS interface is changed.

D. The interval at which an IS-IS interface sends IIH packets is changed.

A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?

A. The circuit level of S4/0/0 is Level-1.

B. S4/0/0 supports IPv6.

C. S4/0/0 sends IIH packets at the interval of 30s.

D. The cost of S4/0/0 is 20.

RSTP provides different functions in different scenarios. Which of the following statements Is false?

A. After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period

B. The role of the designated port that is enabled with root protection cannot be changed C. If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation

D. When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state

According to BGP route selection rules, the route with the higher Local_Pref is preferred.

A. TRUE

B. FALSE