H12-222_V2.5-ENU

Regarding the description of the MAC address spoofing attack, which of the following is wrong?
A . MAC address spoofing attack mainly uses the MAC address learning mechanism of the switch.
B . The attacker can implement MAC address spoofing attacks by sending a forged source Mac address data frame to the switch.
C . MAC address spoofing attacks will cause the switch to learn the wrong mapping relationship between MAC address and IP address.
D . MAC address spoofing attacks will cause the switch to send data to the correct destination instead of the attacker.

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Answer: C

In the admission control scenario of the Agile Controller, which of the following options about the roles of the RAD IUS server and client is correct?
A . The Agile Controller integrates all the functions of the RADIUS server and client.
B . The Agile Controller acts as a RADIUS server, and the user terminal acts as a RADIUS client.
C . The authentication device (such as an 802.1X switch) acts as a RADIUS server, and the user terminal acts as a RADIUS client.
D . The Agile Controller acts as a RADIUS server and an authentication device (such as an 802.1X switch) as a RADIUS client.

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Answer: D

The dynamic IP address assigned by the DHCP server to the client usually has a certain lease period, so regarding the description of the lease period, which of the following is wrong?
A . The lease renewal timer is 50% of the total lease. When the "lease renewal timer" expires, the DHCP client must update the IP address.
B . The rebinding timer is 87.5% of the total lease period.
C . If the "rebinding timer" expires, but the client is still there; after receiving a response from the server, it will continue to send DHCP REQUEST messages to the DHCP server that has previously assigned an IP address until the total lease expires
D . During the lease period, if the client receives a DHCP NAK message, the client will immediately stop using this IP address, return to the initialization state, and apply for a new IP address again.

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Answer: C

When two devices with the same priority compete for the role of Master at the same time, the device with the interface with the smaller IP address should be selected as the Master device.
A . True
B . False

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Answer: B

Regarding the description of the LDP Session establishment process, which of the following is correct? (Multiple Choice)
A . Two LSRs send HELLO messages to each other. The HELLO message carries the transmission address, and the party with the larger transmission address acts as the active party to initiate the establishment of a TCP connection.
B . If the Hello Message does not carry the Transport Address, the destination IP address of the Hello Message is used to establish a TCP connection, and the party with the larger IP address is the active party to initiate the establishment of the TCP connection.
C . The proactive party will send an Advertisement Message to negotiate the relevant parameters for establishing an LDP session, including the LDP protocol version and label distribution method. KeePalive maintains the timer value, maximum PDU length, and label space.
D . If the passive party can accept the relevant parameters, it will send Initialization I, message, and at the same time send a keepalive message to the active party.

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Answer: AD

​​In the network shown in the following figure, if you want to realize the remote LAP session between SWA and SWC, which of the following statement is correct?

A . The configuration in the figure can be achieved
B . Need to configure the direct connection port to establish a TCP connection
C . Need to create a remote peer, and then specify the Isr-id of the peer
D . Specify the Isr-id of the peer in the system view

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Answer: C

In the process of the client applying for an IP address through DHCP and assigning an IP address to the DHCP server, which of the following messages are usually unicast? (Multiple Choice)
A . DHCP OFFER
B . DHCP REQUEST
C . DHCP DISCOVER
D . DHCP ACK

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Answer: AD

In the firewall inter-domain security policy, which of the following data flows is not in the outbound direction?
A . Data flow from the DMZ zone to the untrust zone
B . Data flow from the trust zone to the DMZ zone
C . Data flow from trust zone to untrust zone
D . Data flow from DMZ area to local area

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Answer: D

Which common configuration methods does VXLAN support? (Multiple Choice)
A . Configuration via virtualization software
B . Configure via SDN controller
C . Configure via SNMP protocol
D . Automatic configuration

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Answer: AB

The command to configure the linkage between BFD and static default route is:
A . IP route-static 0.0.0.0.0.0.0.0 10.0.12.2 bfd-session 1
B . IP route-static 0.0.0.0.0.0.0.0 10.0.12.2 track bfd-session 1
C . IP route-static 0.0.0.0.0.0.0.0 10.0.12.2 track 1
D . IP route-static 0.0.0.0.0.0.0.0 10.0.12.2 track session1

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Answer: B