Free H12-821 Exam Dumps Preview

In special scenarios, when advertising routes to an IBGP peer, a BGP device needs to set the next hop to its IP address to prevent blackhole routes.

Which of the following commands can be run in this case?

Which of the following statements is false about the session table mechanism on firewalls?

What are the traffic statistics methods? (Multiple choice)

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A Huawei firewall by default creates security zones named untrust, dmz, _________ and local. (Use Lowercase letters.)

On an OSPF network, all OSPF routers generate Router LSAs. If the E bit in a Router LSA is set to , the 1 router that generates this LSA is a/an ______ .

After the administrator of an enterprise deploys a DHCP server, employees complain that their clients cannot obtain IP addresses from the DHCP server.

Which of the following may cause this problem?

OSPF routers exchange Hello packets to establish neighbor relationships. The Hello packet sending modes vary by network type.
On which of the following types of networks are Hello packets multicast?

During the DHCP interaction process, the DHCP server and client exchange various types of packets.

Which of the following packets is not sent from the client to the server?

On an IS-IS network, each router can generate LSPs.

Which of the following events trigger the generation of a new LSP?

OSPF networks are classified into broadcast, P2P, P2MP, and NBMA networks.

Which of the following types of networks use the default Hello time (30s)?

On an OSPF network, if a router receives an update of an LSA that exists in the local LSDB, the router updates the LSDB and floods the LSA.

DRAG DROP

On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.

Which of the following statements regarding routing policy and policy-based routing are true?

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

The following figure shows a campus network . IS-IS is configured on all routers, and the network runs normally.

By default, which of the following routers have specific routes on the entire network?

STP ensures a loop-free network but has a slow network topology convergence speed, affecting communication quality. RSTP has made some improvements based on STP.

Which of the following improvements is not included?

A filter named si is configured on a device using the as-path-filter command and is applied to a specified BGP peer. The detailed configurations are as follows:

[SW1] ip as-path-filter si permit _65500$
[SW1] bgp 65100
[SW1-bgp] ipv4-family unicast
[SW1-bgp-af-ipv4] peer 10.1.1.2 as-path-filter si import After the configuration is complete, which of the following statements is true about the way the local device processes the routes received from the peer?

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?

In PIM-DM, which of the following processes are involved in SPT establishment?

BGP confederations are widely used because they can reduce the number of IBGP connections in an AS.

Which of the following statements is false about confederations?

Without a prior version check, an engineer configures IGMP snooping on a device and the version of IGMP snooping is earlier than the IGMP versions on user hosts.
In this case, which of the following situations will occur?

Which of the following statements are true about the packet filtering firewall?

As shown in the figure, data traffic is forwarded in tunnel mode along the path of STA -> HAP -> HAC ->
upper-layer network before roaming.

What is the flow direction of data traffic after Layer 3 roaming?

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When receiving a packet, a Huawei router matches the packet against ACL rules. The default ACL matching order used by the Huawei router is ______________

Which of the following statements about stack split is false?

On an RSTP network , port roles are optimized to overcome the disadvantages of STP .

Which of the following port roles are supported in RSTP?

To prevent loops on an STP network , after a designated port is elected, it must wait for a long time and can forward packets only after the status of all ports on the entire network is determined . To solve this problem, RSTP uses the P/A mechanism to speed up the downstream port's transition to the Forwarding state .

ASPF enables the firewall to support multi-channel protocols such as FTP and to define security policies for complex applications.

Four routers run ISIS and have established adjacencies.

The area IDs and router levels are marked in the following figure.
If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?

In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary
LSA.

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In BGP, Keepalive messages are used to maintain BGP peer relationships. When a BGP router receives a Keepalive message from a peer, the BGP router sets the state of the peer to Established and periodically sends Keepalive messages to maintain the connection. By default, the device sends Keepalive messages every seconds.

On an IS-IS network, routers send LSPs to exchange link state information. LSPs are classified into Level- 1 LSPs and Level-2 LSPs and have the same format.

Which of the following parts constitute the LSP ID in an LSP?

An edge port is a new port role added to RSTP to overcome the disadvantages of STP.

Which of the following statements is false about this port role?

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During BGP route summarization configuration, the keyword can be used to suppress all specific routes so that only the summary route is advertised. The summary route carries the Atomic-aggregate attribute rather than the community attributes of specific routes.

An IP prefix list is a common matching tool used in routing policies.

Which of the following cannot be configured as matching conditions in an IP prefix list on a Huawei router?

BFD can quickly detect faults in channels at multiple network layers, ensuring high reliability.
To which of the following layers does BFD belong?

Compared with RSTP, which of the following port roles are added to MSTP?

In IP multicast transmission , packets are transmitted from a source to a group of receivers .

Which of the following statements are true about IP multicast technologies?

Which of the following statements regarding OSPF route summarization commands are true?

OSPF has multiple types of routes with varying priorities.

Which of the following types of routes has the lowest priority when they have the same prefix?

VRRP is implemented based on the priority and preemption functions of VRRP routers.

Which of the following statements is false about the VRRP solution?

Which of the following attribute must be carried in an Update message?

Multiple BGP processes cannot be configured on the same router.

Route attributes are specific descriptions of routes. BGP route attributes can be classified into four types.

Which of the following are well-known discretionary attributes?

On an IS-IS network, each device needs to be configured with a network entity title (NET) , which consists of three parts, each containing different fields.

Which of the following fields are contained in the Area Address part ?

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

As shown in the figure, VRRP is associated with a BFD session. When a backup device detects a fault through BFD, the backup device immediately assumes the master role after the Master_Down_Timer timer expires.