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Which description about the LDP Session establishment process is correct? (multiple choice)
A. The two LSRs send Hello messages to each other. The Hello message carries the transport address, and the larger transport address is used as the initiator to initiate the TCP connection.
B. If the Transport Address is not carried in the Hello Message, then the destination IP address of the Hello Message is used to establish the TCP connection, and the larger destination IP address is used as the initiator to initiate the TCP connection.
C. The initiative side will send the Advertisement Message, to negotiate and establish the LDP session related parameters, including the LDP protocol version, label distribution mode, Keepalive hold timer value, maximum PDU length, and label space, etc.
D. If the passive side can accept the relevant parameters, then send the Initialization Message, while sending Keepalive message to the initiative side.
Answer: AD

HCP Server is responsible for the client IP address allocation. When configuring a DHCP server, what of the following steps are included? (Multiple choice)
A. Enable the DHCP function globally
B. Configure Option 82 of DHCP
C. Configure the global address pool when using DHCP server mode of the global address pool
D. Configure the port address pool when using the DHCP server mode of the port address pool
Answer: ACD

Which several common configuration way does VXLAN support? (Multiple choice)
A. configuration through virtualization software
B. configuration via SDN controller
C. configuration through SNMP protocol
D. automatic configuration
Answer: AB

Flow mirroring is divided into local flow mirroring and remote flow mirroring.
A. True
B. False
Answer: A

Which of the following are the main roles of port-mirroring? (Multiple choice)
A. port-mirroring
B. Local observing port
C. Remote port-mirroring
D. relay port
Answer: ABC

The rapid detection technology can detect the communication failure with adjacent devices as soon as possible, so that the system can take timely measures to ensure uninterrupted service.
A. True
B. False
Answer: A

Which description about MAC address spoofing attack is not correct?
A. MAC address spoofing attack mainly uses the switch MAC address learning mechanism.
B. Attacker can through counterfeit source MAC address data frame send to switch to implement MAC address spoofing attack.
C. MAC address spoofing attack will cause the switch learn the wrong mapping relation between MAC address and IP address.
D. MAC address spoofing attacks will lead to the switch to be sent to the correct destination of the data is sent to the attacker.
Answer: C

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Man-in-the-Middle Attack or IP/MAC Spoofing attack all can lead to information leakage and other hazards, and are more common in the Intranet.

In order to prevent Man-in-the-Middle Attack or IP/MAC spoofing attacks, which configuration methods can be used?

A. Configure the Trusted/Untrusted interface.

B. Limit the maximum number of MAC addresses that allowed to learn on the switch interface.

C. Open DHCP snooping to check the CHADDR field function in DHCP REQUEST packets.

D. Configure DHCP snooping on the switch with DAI or IPSG linkage.

Answer: D

Single-packet attack means attacker control the zombie host, send a large number of attack packets to the target network, resulting in the attack network congestion, system resources exhausted.

A. True

B. False

Answer: B

The interface IP address and virtual IP address of the VRRP can be the same.

A. True

B. False

Answer: A

Which description about the LDP Session establishment process is correct? (multiple choice)

A. The two LSRs send Hello messages to each other. The Hello message carries the transport address, and the larger transport address is used as the initiator to initiate the TCP connection.

B. If the Transport Address is not carried in the Hello Message, then the destination IP address of the Hello Message is used to establish the TCP connection, and the larger destination IP address is used as the initiator to initiate the TCP connection.

C. The initiative side will send the Advertisement Message, to negotiate and establish the LDP session related parameters, including the LDP protocol version, label distribution mode, Keepalive hold timer value, maximum PDU length, and label space, etc.

D. If the passive side can accept the relevant parameters, then send the Initialization Message, while sending Keepalive message to the initiative side.

Answer: AD

In the process of building the LDP session will experience openSent state, when openSent state received Initialization Message, then sending KeepAlive Message, its state will be migrated to ( ) £®

A. initialized

B. openrec

C. operational

D. non-existent

Answer: B


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1.A flow mirroring port can transmit the specified service flows on the mirroring port to the monitoring device for analysis and monitoring.

A. TRUE

B. FALSE

Answer: A


2.In peer-to-peer VPN model, which of the following devices is directly connected to a client and is responsible for connecting VPN services to the carrier network?

A. CE

B. PE

C. P

D. Client device

Answer: B


3.QoS provides different service quality to meet a variety of different needs.

Which of following functions are provided by the QoS? (Multiple Choice)

A. Provide dedicated bandwidth.

B. Reduce the packet loss ratio.

C. Prevent and manage network congestion.

D. Setting the source address of packets.

Answer: ABC



4.Which IP precedence value represents the critical service traffic?

A. 0

B. 2

C. 5

D. 6

Answer: C



5.What about all outgoing labels in the label forwarding table of a MPLS-capable device for the same route with the same next hop?

A. They must be different.

B. They must be the same.

C. They may be the same.

Answer: B

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Knowledge Points
Network Security
1.Basic concept of network security and basic functions and principles of firewall
2.Firewall NAT technology and anti-attack techniques
3.Dual-node cluster hot backup technique of firewall
4.Knowledge and networking application of Eudemon firewalls of Huawei
High Availability(HA)
1.Bidirectional Forwarding Detection(BFD) principles
2.Basic principles of VRRP,IP Reroute,FRR
3.Principles and networking applications of NSF and GR
QoS
1.IP QoS model and differentiated services(DiffServ) model
2.Basic principles of classification and marking, traffic policing and shaping, congestion management, congestion avoidance, and link efficiency mechanisms
3.Class-based QoS principles

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