Free and Premium Huawei H12-321 Dumps Questions Answers

Correct

False

A-MPP-D

A-B-D

A-B-C-D

A-D

Load balancing between the 2.4 GHz and 5 GHz radios is considered in band steering. An AP determines the radio with which a STA preferentially associates based on numbers of access users on the 2.4 GHz and 5 GHz radios.

Check whether the number of access users on an AP exceeds the start threshold for load balancing between radios. If not, STAs can preferentially associate with the 5 GHz radio.

If the number of access users on an AP exceeds the start threshold for load balancing between radios, the AP determines the frequency band to which the STA connects based on radio load difference computed according to the formula (Number of access users on the 5 GHz radio -Number of access users on the 2.4 GHz radio/Number of access users on the 5 GHz radio x 100%).

After the number of users associated with an AP reaches the start threshold for load balancing between radios, if the value obtained based on the formula (Number of access users on the 5 GHz radio - Number of access users on the 2.4 GHz radio/Number of access users on the 5 GHz radio x 100%) is greater than the gap-threshold value, the AP preferentially associates with the STA on the 5 GHz radio.

By default, global revertive switchover is enabled on the standby AC.

By default, global revertive switchover is disabled on the standby AC.

In the N+1 backup scenario, revertive switchover cannot be disabled on the standby AC.

In the N+1 backup scenario, revertive switchover can be disabled on the standby AC.

For intra-AC roaming/ AC1 serves as the HAC for STAs.

For intra-AC roaming, AC2 serves as the FAC for STAs.

For inter-AC roaming, API serves as the HAP for STAs.

For inter-AC roaming, AP3 serves as the FAP for STAs.

User

User group

Organizational unit

Domain

When receiving a new user online request, the AP first calculates the channel utilization rate on the current radio. If the new user threshold is not reached, the new user is allowed to go online.

If the channel utilization reaches the new user threshold after the new user goes online, the access request of other new users is rejected, and an alarm is sent, but the SSID cannot be hidden.

For the access of the roaming user, check whether the channel utilization has reached the roaming user threshold. If it is reached, the roaming user access request is rejected and an alarm is sent.

The AP periodically detects the channel utilization of the radio. Once it falls below the new user threshold, it sends a release alarm to allow new users to go online.

When the load difference between the 5G and 2.4G radios is within the equalization threshold, the AP will direct the terminal to associate with the 5G.

When the load on the 5G radio exceeds 2.4G at the equalization threshold, the AP will direct the terminal to associate with 2.4G.

When the load on the 5G radio exceeds 2.4G in the equalization threshold, if the terminal is associated with 5G, the AP will always reject the terminal association until the terminal associates 2.4G.

If the load balancing difference threshold is set to 10, it means that if the number of terminals on the 5G radio exceeds more than 10 of the 2.4G radio, the load between the two frequencies is considered to be unbalanced.

b, a, d, c

b, d, a, c

a, d, b, c

a, b, d, c

Forward normal data traffic and drop attack traffic

Drop normal data traffic and send attack traffic to the AC

Forward normal data traffic and send attack traffic to the AC

Drop normal data traffic and attack traffic

The MP periodically sends a broadcast PREQ, receives the MP/MPP response unicast PREP, and establishes a round-trip route between any two points.

The MPP periodically sends the broadcast RANN, and the received MP sends a unicast PREQ to the MPP. After receiving the MPP, the MPP responds to the PREP and establishes a route between the MP and the MPP.

The MPP periodically sends the broadcast RANN, and the received MP sends a unicast PREP to the MPP to establish a route between the MP and the MPP.

MPP periodically sends a broadcast PREQ, and the received MP responds to the unicast PREP to establish a route between the MP and the MPP.

2->4->l->3

4->l->2->3

4->2->l->3

2->l->4->3

3.6m

5.6m

8m

9.7m

An HSB group can be enabled in global mode.

An AP needs to be added offline to both the active and standby ACs before it can go online on the two ACs.

If an online AP on the active AC is added offline to the standby AC, the AP status is displayed as fault on the standby AC.

An HSB group takes effect and notifies service modules of status changes only after the HSB group is enabled.

TRUE

FALSE

Multicast

Unicast

Broadcast

Anycast

PMK caching

Key negotiation between STA and AP

Active STA steering

Home agent deployed on the AC

Port number 8080 can be changed to 8443

Portal can be changed to webauth

url-parameter ssid ssid means SSID=ssid

url-parameter ssid ssid means any ssid

1. An AP connects to an online Mesh neighbor through air interfaces.

2. The AP and neighbor negotiate the key, and then set up a Mesh route.

3. The AP obtains an IP address through DHCP.

4. The AP discovers the AC and goes online.

1. An AP connects to an online Mesh neighbor through air interfaces.

2. The AP and neighbor set up a Mesh route, and then negotiate the key.

3. The AP obtains an IP address through DHCP.

4. The AP discovers the AC and goes online.

1. An AP connects to an online Mesh neighbor through air interfaces.

2. The AP and neighbor negotiate the key.

3. The AP obtains an IP address through DHCP.

4. The AP and neighbor set up a Mesh route.

5. The AP discovers the AC and goes online.

1. Once the AP is powered on, it goes online and obtains configurations from the AC.

2. The AP performs link establishment and key negotiation according to the obtained configurations.

The engineer has insufficient Agile Controller account privileges.

User information is synchronized from the AD directory server

Agile Controller creates the same user information

The related user information in the AD directory server is deleted.

4->3->2->1

4->2->3->1

2->3->4->1

2->4->3->1

030831302E32332E3130302E31

040831302E32332E3130302E31

030B31302E32332E3130302E31

030B31302E32332E31302E3031

Deploy the ACU2 on the network.

Configure the VLAN pool.

Configure a security policy of high security.

Deploy the AC6005 on the network.

STA roaming indicates the process in which STAs switch from one AP to another.

In both Layer 2 and Layer 3 roaming, STAs' IP addresses remain unchanged.

The APs used to implement WLAN roaming must be of the same model.

When an AC receives an association/re-association request, it determines that the STA roams if an entry about the STA already exists.

The same radio of an AP can only be added to a load balancing group.

If it is a multi-frequency AP, the load balancing between the radios in the same frequency band on the AP is implemented.

A dual-band AP can be added to two load balancing groups at the same time.

Limited members in each load balancing group, supporting up to 32 members

AC1

AC2

Either of them

None of them

An AC can issue STP configurations to APs only when wired interfaces of APs are not bound to an Eth-Trunk.

Mesh links only transparently transmit STP packets.

An STP-enabled AP does not forward STP packets to the wireless side. STP takes effect only on the AP's wired side.

STP can prevent loops for multiple rings on a Mesh network.

Dual-link HSB: backs up AP, STA, and CAPWAP link information.

VRRP HSB: backs up AP, STA, and CAPWAP link information.

No matter in hot standby or cold standby mode, a standby AC can provide backup services for only one active AC.

Dual-link backup is a cold backup mode, which does not back up STA information. An AP sets up a link with both the active and standby ACs. During an active/standby switchover or a revertive switchover, STAs need to go online again and services are temporarily interrupted.

STP

MSTP

TTL

Repeat frame number detection

After the Option 43 field is configured, the AP sends unicast Discovery Request packets only to the AC IP address passed by the Option 43.

If the AC that the option 43 advertises the IP address does not respond to the AP, the AP finds that the AC fails.

To configure the option 43 field, you need to advertise the IP address of the primary AC and the standby AC to which the AP belongs. You also need to advertise the IP addresses of other primary ACs.

Configure the DHCP server option 43 parameter field. The command for the IP address of the primary AC and the standby AC is option 43 sub-option 2 ipaddress &

After an AC is configured as the Master Controller, it is added to the roaming group by default, and can manage other ACs.

The Master Controller delivers instructions to managed ACs through the CAPWAP tunnel.

Master Controller is a logical role. Any AC can be configured as the Master Controller.

Each AC must have a Master Controller specified.

The same security policy

Same SSID

The same data forwarding mode

The same service VLAN

TRUE

FALSE

AP does not need to go online again

AP needs to go online again

Users do not need to go online again

Users need to go online again

00

01

10

11

The Agile Controller can only use one synchronization mode, which prevents interference between the two modes.

The first synchronization must be manual, and automatic synchronization can be used subsequently.

The automatic synchronization time can be modified.

Manual synchronization can be used only three times within a single day, which prevents increase of network loads.

Correct

False

The core of the dynamic channel adjustment algorithm is the iterative exhaustive algorithm, iterating all possible "AP-channel" combinations, and finally selecting a set of optimal combinations.

The goal of the TPC algorithm is to select an appropriate transmit power to meet the coverage requirements of the AP.

The minimum interference threshold means that the interference strength to the neighbor is very low, the interference is acceptable, and the two APs are not aware of each other and can simultaneously transmit messages.

If the interference of the neighbor is less than the minimum interference threshold, determine whether to reduce the transmit power according to the difference between the two.

Correct

False

After Layer 3 roaming is performed, the VLAN IDs in the service set of APs are changed.

If the VLAN IDs before and after roaming are the same, the STA roams at Layer 2.

Layer 2 roaming indicates that STAs roam within the same subnet.

Layer 3 roaming indicates that STAs roam between different subnets.

The AP periodically sends a Probe Request frame with the specified multicast address on different channels. After receiving the AP, the AP detects that the AP is a neighbor AP.

Active detection is mainly used to establish neighbor relationships between legal APs.

Active detection is mainly used to obtain the maximum interference signal strength between legal neighbors, the most critical of which is the signal strength of neighbor APs.

Active detection and passive detection are used to collect interference from illegal APs.

The wave has a different phase from the point source.

The wave has the same phase as the point source.

Smaller than the first Fresnel zone

Larger than the first Fresnel zone

The core of the Dynamic Channel Allocation (DCA) algorithm is the exhaustion and iteration algorithms, which list all possible AP-Channel combinations and choose the optimal combination.

The Transmit Power Control (TPC) algorithm aims to choose a proper transmit power which can meet coverage requirements of an AP.

Interference specified by the lower interference threshold is low, and within the allowed range. Two neighbor APs cannot detect interference from each other and can send packets simultaneously.

If the interference caused by a neighbor is smaller than the lower interference threshold, the algorithm determines whether to reduce the transmit power according to the difference between the interference caused by the neighbor and the lower interference threshold.

Mesh enabled RF is best to use 2.4G frequency band

The “distance” parameter configuration of adjacent Mesh nodes should be the same

It is best to configure the short GI mode to improve the air interface bandwidth of the Mesh regardless of the distance.

The power parameters of adjacent Mesh nodes should be configured identically to avoid bidirectional transmission bandwidth imbalance.

Figure (a) shows the active/standby mode.

Figure (b) shows the active/standby mode.

Figure (a) shows the load balancing mode.

Figure (b) shows the load balancing mode.

Destination port number in the packets that the WLAN device sends to the Portal server

Number of the port that WLAN device uses to process Portal protocol packets

Source port number in the packets that the WLAN device sends to the Portal server

Number of the port that the WLAN device uses to receive Portal protocol packets

Flood attack detection

Spoof attack detection

Weak IV attack detection

Anti-brute force cracking

TRUE

FALSE

1->2->3->4->5

1->3->4->5->2

1->5->3->2->4

1->4->5->3->2

Improve the terminal's own business experience and overall performance of the wireless channel

Improve wireless channel performance

Load balancing

Spectrum navigation

A rogue AP is an AP not managed by the local AC.

A rogue STA is a STA that does not go online through the local AC.

A rogue bridge is a WDS device not managed by the local AC.

All ad-hoc devices are rogue devices.

Smart roaming directs sticky STAs to APs with better signals, preventing STAs from sticking to the original AP.

Smart roaming directs STAs to APs with better signals in a timely manner.

Smart roaming can be implemented only when it is supported by STAs.

Smart roaming enables the active probe function, so that APs can quickly collect neighbor information. Once a neighboring AP meets the condition, active roaming is triggered.

5G radio configuration transmission power is higher than 2.4G 3-8dB

For the terminal to send a probe request to probe the AP, the AP preferentially responds to the probe on the 5G, and responds to the probe on the 2.4G after responding several times on the 5G.

If the terminal initiates association with the 2.4G radio, the AP refuses to associate, and the association is allowed only after the number of rejections reaches a certain threshold. For the association on the 5G radio, the AP immediately allows the association.

Configure the rate of the beacon on the 5G to be higher than the 2.4G radio. The beacon period is greater than the 2.4G radio. The number of probe retransmissions is less than 2.4G.

Signal transmission frequency

Distance between the receive and transmit antennas

Antenna beamwidth

Earth curvature

VLAN

ACL

Static ARP entry

Static routes

Specific RADIUS attributes

Forward normal data traffic and discard attack traffic

Discard normal data traffic and report attack traffic

Forward normal data traffic and report attack traffic

Drop normal data traffic and discard attack traffic

API preferentially uses the load balancing algorithm for calculation and allows the association request from STA6.

API preferentially uses the load difference threshold algorithm for calculation and allows the association request from STA6.

API preferentially uses the load balancing algorithm for calculation and rejects the association request from STA6.

API preferentially uses the load difference threshold algorithm for calculation and rejects the association request from STA6.

MP

MPP

MAP

VAP

Flooding attack

Spoofing attack

Weak IV attack

Brute force

The limitations of coverage are broken

Reduce reliance on wired networks

Wireless signal is stronger

Support AP or AC function of Mesh device is more powerful

Option A

Option B

Option C

Option D

Users can be assigned to the same VLAN multiple times, and the IP usually does not change.

The number of users in each VLAN is evenly divided.

The number of users in each VLAN is unevenly divided.

The user is back online, the VLAN is easy to change, and the IP will change.

Based on channel usage

Based on the number of users

Based on the terminal SNR

Based on the number of APs

Correct

False

Each directory server has a DN parameter

The DN parameter is only available in the LDAP server.

DN is a parameter that needs to be manually configured by the directory server administrator.

The DN parameter is only available in the AD server.

The AP only establishes a CAPWAP tunnel with the AC.

The AP establishes a CAPWAP tunnel with both the primary and backup ACs.

The AP periodically exchanges CAPWAP packets with the active and standby ACs to detect link status.

The AP periodically exchanges CAPWAP packets with the primary AC to detect link status.

The transmit power of the AP determines the coverage of its RF signal. The larger the AP power, the larger its coverage.

The global tuning algorithm mainly includes the dynamic channel adjustment algorithm TPC and the transmission power control algorithm DCA.

The traditional RF power control method only statically sets the transmit power to the maximum value, simply pursuing the signal coverage, but excessive power may cause unnecessary interference to other wireless devices.

When dynamically adjusting power, it is necessary to choose an optimal power that balances coverage and signal quality.

To limit the total duration for the user connection.

To specify the point of time at which user access is allowed.

To specify the point of time before which the user must disconnect from the network.

To specify the time period in which user access is allowed.

TRUE

FALSE

a

b

c

d

[AC-wlan-view] regulatory-domain-profile name domain1

[AC-wlan-view] air-scan-profile name wlan-airscan

[AC-wlan-view] rrm-profile name profile-name

[AC-wlan-view] sta-load-balance static-group name static-1

Correct

False

0,0

0,1

1,0

1,0

The AP establishes a Mesh air interface link with the Mesh neighbors that have been online, performs key negotiation, establishes a mesh route, obtains an IP address through the DHCP process, finds the AC, and performs subsequent online processes.

The AP establishes a Mesh air interface link with the Mesh neighbors that have been online, establishes a Mesh route, performs key negotiation, obtains an IP address through the DHCP process, finds the AC, and performs subsequent online processes.

The AP establishes a Mesh air interface link with the Mesh neighbors that have been online, performs key negotiation, obtains an IP address through the DHCP process, establishes a Mesh route, finds the AC, and performs subsequent online processes.

Initial power-on of the AP After the AC is taken online, the AP will re-establish chain-building and key negotiation according to the new configuration.

(a)

(b)

(c)

(d)

All STAs in a Mesh BSS have the same Mesh profile. If two Mesh profiles have the same parameters, the profiles are considered the same.

A Mesh profile contains the following fields: Mesh ID, A path selection protocol identifier (fixed value), and A path selection metric identifier (fixed value).

After a Mesh BSS is set up or an STA joins a BSS, the STA generates a Mesh profile.

An STA will not modify its Mesh profile unless the profile is deleted from the BSS (the STA is a member of the BSS).

API and STA1

API and STA2

AP2 and STA1

AP2 and STA2

Global RF tuning

Interface RF Tuning

Local RF tuning

Process RF tuning

RADIUS server

AD server

DNS server

Portal server

The HAC at the tunnel ingress discards unknown unicast packets.

The HAC discards broadcast or multicast ARP, ND, DHCP, and mDNS packets to prevent loops.

After broadcast/multicast packets are transparently transmitted to the FAC, the FAC converts the packets to unicast packets and forwards the packets over a specific tunnel based on the home AP connected to it.

The FAP discards unknown unicast packets and forwards other packets to roaming STAs.