HCNA

H12-721 HCIP-Security-CISN

Use original educational practice content, randomized simulator sessions, score history and explanation review for H12-721.

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Les questions d’entraînement sont fournies en anglais afin de rester proches de la langue couramment utilisée dans les certifications IT.

QZ9 est une plateforme de formation indépendante. Toutes les questions d’entraînement sont originales et créées uniquement à des fins éducatives. Nous ne fournissons pas de contenu d’examen réel ni de contenu non autorisé. Microsoft, AWS, Cisco, CompTIA, PMI et les autres marques appartiennent à leurs propriétaires respectifs.

FournisseurHCNA

CodeH12-721

Duration90 Minutes

Questions240 refs

Informations examen

Une préparation basée sur les objectifs, sans contenu non autorisé

Certification metadata is preserved from the legacy QZ9 catalog. Questions remain English-only.

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Simulateur d’examen

Les questions d’entraînement sont fournies en anglais afin de rester proches de la langue couramment utilisée dans les certifications IT.

Question 1

DDos attacks work through the network to the target (usually a server, such as DNS server, WEB server) and sends a small amount of abnormal packets of non-traffic, so that the attacked server parses the message, causing the system to crash or become busy.

Question 2

In the TCP / IP protocol, TCP protocol provides reliable connectivity service using three-way handshake to achieve. The first handshake: establish a connection, the client sends a SYN packet (SYN = J) to the server, and enter SYN_SENT state, waiting for the server to confirm. Second handshake: the server receives a SYN packet and must issue an ACK packet (ACK = ) to confirm the client's SYN packet, but he is sending a SYN packet (SYN = K), ie, SYN-ACK packets, the server enters SYN_RCVD state. Third handshake: the client receives the SYN-ACK packet, the server sends an acknowledgment packet ACK (SYN = ASK = ), this package has been sent, the client and server enter into the ESTABLISHED state, completing the three-way handshake. About three-way handshake during the three parameters, which of the following statements is correct?

Question 3

The IKE first stage main mode negotiation process includes the following information? (Choose three answers)

Question 4

In-Band management and port management control information and business information is transmitted on the same channel.

Question 5

ESP verifies only the IP payload in NAT traversal, but the ESP port information will be encrypted causing the layer 4 information to be unusable with PAT. Using the IPsec NAT transparency feature can solve this problem, the ESP packet is encapsulated in a UDP header and contains the information necessary to enable PAT to work.