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Huawei HCIE-Security (Huawei Certified Internetwork Expert-Security) Sample Questions:

1. A server on the network has been responding very slowly recently. By looking at its running status, it is found that its CPU and memory usage ratio is high, but there is little or no data transmission in these TCP session connections.
For the following judgments about this problem phenomenon, please choose the best one:

A) The server is under HTTP POST slow attack.
B) The server is under a TCP spoofing attack.
C) The server is under SYN flood attack.
D) The server is under UDP flood attack.

2. An FTP server ( DMZ ) on the existing network of the enterprise provides FTP services to the outside ( Untrust ), and a USG firewall is deployed on the external network port.
The following information is obtained by capturing packets on the FTP server:
Sequence Number Source Address Destination Address Protocol Packet Summary
1 1.1.1.1 192.168.1.2 TCP 3318>21 [SYN] Seq=0 Len=0 MSS=1460
2 192.168.1.2 1.1.1.1 TCP 21>3318 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460
3 1.1.1.1 192.168.1.2 TCP 3318>21[SYN] Seq=1 Ack=1 Win=65535 Len=0
......
13 1.1.1.1 192.168.1.2 FTP Request: PASV
14 192.168.1.2 1.1.1.1 FTP Response: 227 Entering Passive Mode (192, 168, 1, 2, 4, 162)
15 1.1.1.1 192.168.1.2 TCP 3319>1186 [SYN] Seq=0 Len=0 MSS=1460
16 192.168.1.2 1.1.1.1 TCP 1186>3319 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460
17 1.1.1.1 192.168.1.2 TCP 3319>1186 [SYN] Seq=1 Ack=1 Win=65535 Len=0
.....
The following descriptions are correct:

A) The NAT configuration of nat-policy must be completed on the firewall.
B) A servermap entry is automatically generated on the firewall.
C) The data channel has been established normally between the host 1.1.1.1 and the FFP server 192.168.1.2.
D) FTP server FTP service is active mode.

3. Which statement about MTU and PMTU is correct?

A) PMTU detection is to obtain the PMTU value of the specified destination IPv4 address through detection, and then use the MTU value to send packets.
B) The device will check the MTU on the inbound interface, and if the packet size exceeds the MTU value, it will be discarded.
C) MTU (Maximum Transfer Unit) refers to the size of the largest data packet that can be transmitted in the network, in bytes.
D) In an IP network, interfaces with different MTU values may be passed from the source address to the destination address, and the largest MTU value is the PMTU of the path.

4. When the IPsec negotiation fails, turn on the debug switch of IKE, and the following information is displayed: got NOTIFY of type INVALID_ID_INFORMATION or drop message from ABCD due to notification type INVALID_ID_INFORMATION, what does it mean?

A) LOCAL-ID-TYPE at both ends are inconsistent
B) IKE proposals at both ends do not match
C) ACL configurations on both ends do not match
D) IPsec proposals at both ends do not match

5. Huawei NIP5000 products are based on signature security.

A) FALSE
B) TRUE

Solutions: