Latest H12-821_V1.0 Study Guides 2023 – With Test Engine PDF [Q18-Q38]

NO.18 Which of the following statements about WLAN roaming are true?

APs for roaming do not need to have overlapping signal coverage.

APs for roaming must be in the same extended service set (ESS).

APs for roaming must have overlapping signal coverage.

APs for roaming must be in the same basic service set (BSS).

NO.19 What is the correct procedure for a VLAN pool to assign terminals to VLANs.

NO.20 Which of the following statements regarding OSPF route summarization is false?

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

Any router in OSPF can summarize routes.

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.

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

NO.21 Regarding the route-policy set-cost configuration below, which of the following statements is true?

The route 11.1.0.0/16 is permitted by node 10, and its tost Is set to 300.

The cost of all routes is set to 200.

All the routes that are not permitted by node 10 will be denied.

The route 11.1.0.0/16 will continue to match node 20 after permitted by node 10, and (he final cost is set to 200.

NO.22 As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?

AC1

Random access

None

AC2

NO.23 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?

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

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

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

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

NO.24 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.

TRUE

FALSE

NO.25 In BGP, the origin attribute of the routes imported using the import-route command is incomplete.

TRUE

FALSE

NO.26 RSTP provides different functions in different scenarios. Which of the following statements Is false?

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

The role of the designated port that is enabled with root protection cannot be changed

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

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

NO.27 Which of the following statements regarding the summary automatic command and BGP route summarization is false?

After this command is configured, BGP sends only the summarized routes to peers

This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization

This command enables automatic summarization for the locally imported routes

After this command is configured, BGP summarizes routes based on natural network segments

NO.28 There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)

NO.29 Which Of the following IEEE 802.11 standards is also known as Wi-Fi 6?

802.11ac

802.11n

802.11ax

802.11b

NO.30 Which of the following statements regarding an IP prefix are true?

An IP prefix filter is used to filter IP address prefixes and cannot match an IP prefix number and a prefix length at the same time.

An IP prefix filter cannot be used to filter data packets.

An IP prefix filter is used to filter IP address prefixes and can match an IP prefix number and a prefix length at the same time.

An IP prefix filter can be used to filter data packets.

NO.31 Which of the following statements about the forwarding plane of a switch is false?

Provides high-speed and non-blocking data channels.

Can encapsulate and decapsulate packets.

Can collect packet statistics.

Consists of main control boards and interface boards.

NO.32 BFD control packets are encapsulated in UDP packets for transmission. What is the destination port number of multi-hop BFD control packets?

4784

3784

5784

2784

NO.33 Which of the following statements is false?

If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.

A device with a higher router priority has a higher election priority.

When a router with the highest router priority joins an OSPF network, this router will become the new DR.

If two devices have the same router priority, the device with a larger router ID has a higher election priority.

NO.34 Which of the following attacks is not the network layer attack?

IP spoofing attack

ICMP attack

Smurf attack

ARP spoofing attack

NO.35 A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?

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

S4/0/0 supports IPv6.

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

The cost of S4/0/0 is 20.

NO.36 Which of the following PIM protocol packets have unicast destination addresses.

Register Stop

Bootstrap

Graft

Assert

NO.37 As shown in the figure, SWA, SWB, SWC, and SWD run the Rapid Spanning Tree Protocol (RSTP). Which of the following statements are true?

Once receiving OPOUs, the edge port re-partlci pates in the calculation of the spanning tree.

After a port is Configured as an edge port, the port can quickly enter the Forwarding state.

You can enable the edge port on SWD’s GEO/0/2 connected to the terminal so that this port can quickly enter the Forwarding state.

You can enable the edge port on SWC’s GE0/0/2 connected to the terminal so that this port can quickly enter the forwarding state.

NO.38 After which of the following parameters are modified does an IS-IS neighbor relationship need to re-established?

The cost of an IS-IS interface is changed.

The IP address of an ISIS interface is changed.

The level of an ISIS interface is changed.

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

Latest H12-821_V1.0 Study Guides 2023 – With Test Engine PDF [Q18-Q38]

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